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Brief Description of Vector Signal Analysis

R&S

FSV-K70

Operating Manual 1176.7578.02 ─ 09

Figure 2-46: Pattern Symbol Check algorithm

2.5 Signal Model, Estimation and Modulation Errors

This section describes the signal and error models used within the R&S

FSV-K70 VSA

option. The estimation algorithms used to quantify specific modulation errors are then
outlined. The chapter is divided into two parts:

2.5.1

PSK, QAM and MSK Modulation.................................................................................. 51

2.5.1.1

Error Model................................................................................................................... 51

2.5.1.2

Estimation..................................................................................................................... 52

2.5.1.3

Modulation Errors..........................................................................................................53

2.5.2

FSK Modulation.............................................................................................................60

Signal Model, Estimation and Modulation Errors

Содержание FSV-K70

Страница 1: ...R S FSV K70 Vector Signal Analysis Operating Manual Operating Manual 1176 7578 02 09 ÚÙÜ2 Test Measurement ...

Страница 2: ...wever note the differences described in Chapter 1 4 Notes for Users of R S FSV 1307 9002Kxx Models on page 9 R S FSV3 1307 9002K03 R S FSV7 1307 9002K07 R S FSV13 1307 9002K13 R S FSV30 1307 9002K30 R S FSV40 1307 9002K39 1307 9002K40 2017 Rohde Schwarz GmbH Co KG Mühldorfstr 15 81671 München Germany Phone 49 89 41 29 0 Fax 49 89 41 29 12 164 Email info rohde schwarz com Internet www rohde schwarz...

Страница 3: ... 2 5 Signal Model Estimation and Modulation Errors 50 3 Instrument Functions for Vector Signal Analysis 67 3 1 Measurement Result Display 69 3 2 Softkeys and Menu Overview for Vector Signal Analysis R S FSV K70 107 3 3 Configuring VSA Measurements 141 3 4 Further Information 201 4 Remote Control Commands R S FSV K70 204 4 1 Notation 204 4 2 ABORt Subsystem 207 4 3 CALCulate subsystem 207 4 4 DISPl...

Страница 4: ...QUESTionable MODulation n PHASe Register 336 5 6 STATus QUESTionable MODulation n MAGnitude Register 337 5 7 STATus QUESTionable MODulation n CFRequency Register 337 5 8 STATus QUESTionable MODulation n IQRHO Register 337 5 9 STATus QUESTionable MODulation n FSK Register 338 6 Support 339 6 1 Explanation of Error Messages 339 6 2 Flow Chart for Troubleshooting 348 6 3 Frequently Asked Questions 35...

Страница 5: ...ns typical measurement examples and general infor mation e g safety instructions etc A printed version is delivered with the instrument A PDF version is available for download on the Internet 1 1 2 Operating Manuals and Help Separate operating manuals are provided for the base unit and the software options Base unit manual Contains the description of all instrument modes and functions It also prov...

Страница 6: ...is delivered with the instrument 1 1 6 Data Sheets and Brochures The data sheet contains the technical specifications of the R S FSVA FSV It also lists the options and their order numbers as well as optional accessories The brochure provides an overview of the instrument and deals with the specific char acteristics See www rohde schwarz com brochure datasheet FSV 1 1 7 Release Notes and Open Sourc...

Страница 7: ...hods may be available to per form the same task In this case the procedure using the touchscreen is described Any elements that can be activated by touching can also be clicked using an addition ally connected mouse The alternative procedure using the keys on the instrument or the on screen keyboard is only described if it deviates from the standard operating pro cedures The term select may refer ...

Страница 8: ...key is displayed Contents of the help dialog box The help dialog box contains four tabs Contents contains a table of help contents View contains a specific help topic Index contains index entries to search for help topics Zoom contains zoom functions for the help display To change between these tabs press the tab on the touchscreen Navigating in the table of contents To move through the displayed ...

Страница 9: ... of R S FSV 1307 9002Kxx Models Users of R S FSV 1307 9002Kxx models should consider the following differences to the description of the newer R S FSVA FSV 1321 3008Kxx models Functions that are based on the Windows 10 operating system e g printing or set ting up networks may have a slightly different appearance or require different set tings on the Windows XP based models For such functions refer...

Страница 10: ... demodulator The implemented mod ulation modes and the associated predefined symbol mappings are also listed The last part of this chapter deals with vector and scalar modulation errors 2 1 Block Diagram of Digital Signal Processing Hardware for I Q Data The following sections describe the digital hardware used to capture I Q data for vector signal analysis with the R S FSV K70 2 1 1 Block Diagram...

Страница 11: ...nd Input The following block diagram provides an overview on how digital baseband input is processed in the R S FSV K70 option The digital baseband input requires option R S FSV B17 Figure 2 2 Block diagram of digital hardware for digital baseband input B17 in vector signal analy sis The digital I Q data stream is fed into the analyzer via the connector of the digital base band interface R S FSV B...

Страница 12: ...suppressed Only for very wide signals FSK no TX filter used it can be necessary to try higher values for Capture Oversampling see Capture Oversam pling on page 154 increasing the I Q bandwidth The I Q data delivered to the DSP section has no considerable amplitude or phase distortion and a suitable bandwidth The I Q Capture dialog of the vector signal analysis shows the sample rate and the usable ...

Страница 13: ...ion option R S FSV B70 R S FSVA B40 128 MHz 25 Hz 32 MHz R S FSVA FSV with active band width extension option B160 1 28 GHz 25 Hz restricted to 160 MHz 1307 9002K39 12 5 MHz 25 Hz 3 125 MHz Using this sample rate the resulting I Q data bandwidth can be determined from the figure Relation between maximum usable bandwidth and sample rate RF input in the base unit description section Working with I Q...

Страница 14: ...t channels fall within the demodulation bandwidth 2 2 4 Modulation and Demodulation Filters Sample points are required for demodulation in the analyzer where only information of the current symbol and none of neighbouring symbols is present symbol points These points are also called ISI free points ISI intersymbol interference If the trans mitter does not provide an ISI free signal after the trans...

Страница 15: ...er meas filtering It is calculated by the analyzer from the above filters convolution operation Transmit filter Meas Filter Table 2 2 Typical combinations of Tx and Meas filters Transmit filter Measurement filter analyzer Remarks RC raised cosine filter combination without intersymbol interference ISI RRC root raised cosine RRC filter combination without ISI GMSK filter combination with low ISI Li...

Страница 16: ...the reference signal i e not the instantaneous frequency or magnitude of the MSK signal 2 2 5 Transmit filters The transmit filters required for common standards are provided by the R S FSV K70 Table 2 3 Overview of predefined Transmit filters RC Raised cosine RRC Root raised cosine Gauss Gauss filter GMSK Gauss filter convolved with a rectangular filter typically used for MSK Linearized GMSK Stan...

Страница 17: ...e demodu lator and have already been filtered with the Transmit filter For MSK PSK QAM and User QAM the measurement filter filters the real part and imaginary part of these signals For FSK the measurement filter filters the instantane ous frequency of these signals The R S FSV K70 defines the error signal as the difference between the reference signal and the measurement signal Thus the measuremen...

Страница 18: ... S FSV K70 have low pass characteristics they suppress high frequency distortion components in the Meas Ref Error signal The errors are weighted spectrally Thus turning off the measurement filter can have an influence on the numeric and graphical error values However the measurement filter should be switched off if non linear distortions have to be measured they usually pro duce high frequency com...

Страница 19: ...s at 1 5 Fsymbol 40dB Rectangular Rectangular filter in the time domain with a length of 1 symbol period integrate and dump effect RRC Root Raised Cosine Filter The roll off parameter Alpha is set according to the Transmit filter if the Auto according to Trans mit filter option is enabled see Auto on page 175 Other wise it must be set manually If the Transmit filter is also a Root Raised Cosine fi...

Страница 20: ...TLAB pcode on the Internet at http www rohde schwarz com search term FILTWIZ Figure 2 6 FILTWIZ filter tool for the R S FSV K70 It is possible to load customized transmit filters and customized measurement filters If a customized transmit filter is selected the internal receive filter coefficients are calcu lated automatically on the fly Note that this is different to the R S FSQ K70 where it is n...

Страница 21: ...les to the R S FSVA FSV You can transfer the vaf filter files to the R S FSVA FSV using a USB memory device To load a user transmit TX filter 1 1 Open the Modulation tab of the Modulation Signal Description dialog 2 Select Transmit filter Type User 3 Select Load User Filter 4 Load your vaf file from the USB stick To load a user measurement filter 1 Open the Measurement Filter tab of the Demodulati...

Страница 22: ...Keying PSK With this type of modulation the information is represented by the absolute phase position of the received signal at the decision points All transitions in the I Q diagram are possible The complex constellation diagram is shown The symbol numbers are entered in the diagram according to the mapping rule BPSK NATURAL 0 1 Figure 2 7 Constellation diagram for BPSK including the symbol mappi...

Страница 23: ...78 02 09 0 1 2 3 Figure 2 9 Constellation diagram for QPSK GRAY including the symbol mapping 0 1 2 3 Figure 2 10 Constellation diagram for QPSK NATURAL including the symbol mapping 0 1 2 3 Figure 2 11 Constellation diagram for QPSK including the symbol mapping for WCDMA Symbol Mapping ...

Страница 24: ...1 2 3 4 5 6 7 Figure 2 12 Constellation diagram for 8PSK GRAY including the symbol mapping 0 1 2 3 4 5 6 7 Figure 2 13 Constellation diagram for 8PSK NATURAL including the symbol mapping 0 1 2 3 4 5 6 7 Figure 2 14 Constellation diagram for 8PSK including the symbol mapping for DVB S2 Symbol Mapping ...

Страница 25: ... in practical applications because it prevents signal tran sitions through the zeros in the I Q plane This reduces the dynamic range of the modulated signal and the linearity requirements for the amplifier In practice the method is used for 3π 8 8PSK for example and in conjunction with phase differential coding for π 4 DQPSK Symbol mapping The logical constellation diagram for 3π 8 8PSK comprises ...

Страница 26: ... Q symbol stream after 3π 8 rotation in I Q plane if the symbol number 7 is transmitted six times in a row 0 1 2 3 Figure 2 17 Constellation diagram for 3π 4 QPSK including the symbol mapping for EDGE 0 1 2 3 Figure 2 18 Constellation diagram for π 4 QPSK Natural including the symbol mapping Symbol Mapping ...

Страница 27: ...llation points on the diagonals while other standards define the coordinate axes In Table 2 5 the symbols are assigned to phase shifts The QPSK INMARSAT map ping corresponds to simple QPSK with phase differential coding Tables Table 2 6 and Table 2 7 show two types of differential 8PSK modulation Another type of differential PSK modulation is shown in Table 2 6 Differential coding according to VDL...

Страница 28: ...l binary indica tion MSB LSB 000 001 010 011 100 101 110 111 Phase shift 0 45 135 90 270 315 225 180 Table 2 8 D8PSK VDL Logical symbol mapping Modulation symbol binary indica tion MSB LSB 000 001 010 011 100 101 110 111 Phase shift 0 45 135 90 315 270 180 225 2 3 4 Rotating Differential PSK Modulation Phase differential modulation is frequently combined with an additional phase shift e g π 4 DQPS...

Страница 29: ...ary indication MSB LSB 00 01 10 11 Phase shift 180 45 90 45 90 45 0 45 Table 2 11 π 4 DQPSK Natural Logical symbol mapping Modulation symbol binary indication MSB LSB 00 01 10 11 Phase shift 0 45 90 45 180 45 90 45 Table 2 12 π 4 DQPSK APCO25 and APCO25Phase2 Logical symbol mapping Modulation symbol binary indication MSB LSB 00 01 10 11 Phase shift 0 45 90 45 90 45 180 45 2 3 5 Offset QPSK Offset ...

Страница 30: ...35 2 1 0 1 2 2 1 0 1 2 Inphase Quadrature 2 1 0 1 2 2 1 0 1 2 Inphase Quadrature Offset QPSK reduces the dynamic range of the modulated signal with respect to nor mal QPSK and therefore the demands on amplifier linearity by avoiding zero cross ings A distinction is made in the analyzer display In the Vector I Q result display of the measurement or reference signal the time delay is not compensated...

Страница 31: ...pping diagram versus the instantaneous frequency An instantaneous frequency of zero in the baseband corresponds to the input frequency of the analyzer 2FSK NATURAL With 2FSK the symbol decision is made by a simple frequency discriminator 1 1 1 0 Symbol Numbers Figure 2 23 Constellation diagram for 2FSK NATURAL including the logical symbol mapping 4FSK With 4FSK the symbol decision is made by a fre...

Страница 32: ...ation diagram for 4FSK NATURAL including the logical symbol mapping 1 3 1 3 3 1 Symbol Numbers 1 0 1 2 Figure 2 25 Constellation diagram for 4FSK GRAY including the logical symbol mapping 1 3 1 3 0 2 Symbol Numbers 1 3 1 1 Figure 2 26 Constellation diagram for 4FSK for APCO C4FM and APCO Phase 2 including the logical symbol mapping Symbol Mapping ...

Страница 33: ...1176 7578 02 09 8FSK NATURAL 3 7 5 7 2 1 Symbol Numbers 1 0 1 7 3 5 7 3 7 6 5 1 7 4 1 7 Figure 2 27 Constellation diagram for 8FSK NATURAL including the logical symbol mapping 16 FSK Figure 2 28 Constellation diagram for 16FSK including the logical symbol mapping Symbol Mapping ...

Страница 34: ... LSB 0 1 Phase shift 90 90 Table 2 15 MSK GSM Logical symbol mapping Modulation symbol binary indication MSB LSB 0 1 Phase shift 90 90 Figure 2 29 MSK for GSM and NATURAL and DMSK Constellation Diagram including the symbol mapping Similar to PSK differential coding can also be used with MSK In this case too the information is represented by the transition of two consecutive symbols The block dia g...

Страница 35: ... demodulation symbol numbers should be distributed evenly with respect to the symbol alphabet As a rule of thumb the result length should correspond to at least 8 times the modula tion order For example with 64 QAM a result length of at least 8 64 512 symbols should be used QAM Mappings The following QAM mappings are obtained from the mapping of the 1st quadrant which is always rotated by π 2 for ...

Страница 36: ...hexa decimal and binary 0 1 2 3 4 5 6 7 8 9 A B C D E F 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 Figure 2 32 Constellation diagram for 16QAM including the logical symbol mapping for EDGE hexa decimal and binary 0 1 2 3 4 5 6 7 8 9 A B C D E F 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 Figure 2 33 Constellation diagram for ...

Страница 37: ... 36 37 38 39 3A 3B 3C 3D 3E 3F 000000 000001 000010 000011 000100 000101 000110 000111 001000 001001 001010 001011 001100 001101 001110 001111 Figure 2 35 Constellation diagram for 64QAM including the logical symbol mapping for DVB C hex adecimal and binary the binary form shows the upper right section of the diagram only 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 1...

Страница 38: ...agram only 2 3 9 User QAM In the case of a User QAM modulation the information can be represented by the sig nal amplitude and or the signal phase 16APSK C D E F R 2 R 1 0 1 2 3 4 5 6 7 8 9 A B Figure 2 38 Constellation diagram for 16APSK including the logical symbol mapping for DVB S2 For DVB S2 16APSK mappings the ratio of the outer circle radius to the inner circle radius γ R2 R1 depends on the...

Страница 39: ...ius to the inner circle radius γ1 R2 R1 and the ratio of the outer circle radius to the inner circle radius γ2 depend on the utilized code rate and comply with Table 2 18 Table 2 18 Optimum constellation radius ratios γ1 and γ2 linear channel for 32APSK Code Rate Modulation coding spectral efficiency γ1 γ2 2 3 3 74 2 84 5 27 3 4 3 99 2 72 4 87 4 5 4 15 2 64 4 64 5 6 4 43 2 54 4 33 8 9 4 49 2 53 4 ...

Страница 40: ...al 1176 7578 02 09 0 1 Figure 2 40 Constellation diagram for OOK 4ASK 4ASK is a 4 ary Amplitude Shift Keying mapping type With this type of modulation the information is solely represented by the absolute amplitude of the received signal at the decision points Symbol Mapping ...

Страница 41: ...Brief Description of Vector Signal Analysis R S FSV K70 41 Operating Manual 1176 7578 02 09 0 1 2 3 Figure 2 41 Constellation diagram for 4ASK Symbol Mapping ...

Страница 42: ...ef Description of Vector Signal Analysis R S FSV K70 42 Operating Manual 1176 7578 02 09 2 4 Demodulation Overview Figure 2 42 Demodulation stages of the vector signal analysis option Demodulation Overview ...

Страница 43: ...search for one pattern at a time The pattern search can be switched on or off via the Pattern Search dialog see Pat tern Search on page 160 Extraction of Result Range The Result Range can be aligned to a burst a pattern or simply the start of the Cap ture Buffer see Result Range on page 165 Within this stage the Result Range is cut from the Capture Buffer starting at a point that is specified by t...

Страница 44: ... amplitude droop Alterna tively it is possible to disable the estimation algorithm For FSK modulated signals estimates for the signal amplitude signal timing carrier frequency error FSK deviation error and the carrier frequency drift are calculated The measurement signal is subsequently corrected with these estimates Compensation for FSK deviation error and carrier frequency drift can be enabled o...

Страница 45: ...ssible to decide whether the burst candidates comply with the user settings All bursts must have a length between Min Burst Length Search Tolerance and Max Burst Length Search Tolerance to be accepted See Continuous Signal Burst Signal on page 147 and Search Tolerance on page 159 for a more detailed description of these parameters Figure 2 43 Burst Search parameters You can influence the robustnes...

Страница 46: ...urthermore this stage can function as a filter If the burst search and I Q pattern search are switched on and the parameter Meas Only If Pattern Symbols Correct is set to true only bursts with the correct pattern are demodulated see Meas only if pattern symbols correct on page 161 During the I Q pattern search stage the capture buffer is searched for an I Q pattern by trying different time and fre...

Страница 47: ...oscillators LO of the transmitter device under test and the receiver R S FSVA FSV are normally not cou pled their phase offset with respect to each other is unknown The unknown transmis sion delay between DUT and R S FSVA FSV adds a further unknown phase offset Due to this unknown phase offset the result of the demodulation can be ambiguous with respect to the absolute phase position because of th...

Страница 48: ...Brief Description of Vector Signal Analysis R S FSV K70 48 Operating Manual 1176 7578 02 09 Figure 2 45 Demodulation and Symbol Decision algorithm Demodulation Overview ...

Страница 49: ...tart of the pattern The extracted sequence is then compared to the selected pattern If the demodulation has been ambiguous with respect to the absolute phase position the extracted sequence needs to be compared to all possible rotated versions of the selected pattern For example in the case of QPSK modulation the rotational symme try has the order four i e there are four pattern hypotheses If the ...

Страница 50: ... section describes the signal and error models used within the R S FSV K70 VSA option The estimation algorithms used to quantify specific modulation errors are then outlined The chapter is divided into two parts 2 5 1 PSK QAM and MSK Modulation 51 2 5 1 1 Error Model 51 2 5 1 2 Estimation 52 2 5 1 3 Modulation Errors 53 2 5 2 FSK Modulation 60 Signal Model Estimation and Modulation Errors ...

Страница 51: ...ignal model for PSK QAM and MSK modulation is depicted in Fig ure 2 47 and can be expressed as 0 2 t n e e c t REF g j c t REF g t MEAS t t f j j Q Q Q I I I where REFI t and REFQ t the inphase and quadrature component of the reference signal gI and gQ the effects of the gain imbalance cI and cQ the effects of an IQ offset ϑ the quadrature error α the amplitude droop f0 the carrier frequency offse...

Страница 52: ...5 Signal Model Estimation and Modulation Errors on page 50 Subsequently the measurement signal is corrected with the determined parameter vector Note that with a subset of the parameters you can enable or disable correction see Demodulation on page 169 Estimation ranges The estimation ranges are determined internally according to the signal description For continuous signals the estimation range c...

Страница 53: ...Error Vector Magnitude EVM Figure 2 49 Modulation error EVM magnitude error phase error The magnitude of the error vector in the diagram is specified as the error vector magni tude EVM It is commonly normalized to the mean reference power The EVM should not be confused with the magnitude error see below Magnitude Error The magnitude error is defined as the difference between the measurement vector...

Страница 54: ...ation measure ments The phase error should not be confused with the error vector phase The error vector phase is the absolute phase of the error vector see Figure 2 50 The effects of the different modulation errors in the transmitter on the result display of the analyzer are described on the next pages All diagrams show the equivalent com plex baseband signal Modulation Error Ratio MER The modulat...

Страница 55: ... 52 Effect of gain imbalance The gain difference in the I and Q channels during signal generation in the transmitter is referred to as gain imbalance The effect of this error on the constellation diagram and the unit circle are shown in Figure 2 52 In the example the gain in the I channel is slightly reduced which causes a distortion of coordinates in the I direction The unit cir cle of the ideal ...

Страница 56: ...ion of the gain imbalance and the quadrature error is significant Quadrature Error Figure 2 53 Effect of Quadrature Error The quadrature error is another modulation error which is shown in figure Figure 2 53 In this diagram the I and Q components of the modulated carrier are of identical ampli tude but the phase between the two components deviates from 90 This error also distorts the coordinates I...

Страница 57: ...on is selected in the demodulation settings In this case the I Q imbalance does not affect the EVM Note that the I Q imbalance is not estimated and cannot be compensated for in a BPSK signal Amplitude Droop The decrease of the signal power over time in the transmitter is referred to amplitude droop 0 50 100 150 200 0 0 2 0 4 0 6 0 8 1 1 2 Time Symbols Magnitude of Meas Signal relative Figure 2 54 ...

Страница 58: ...tion is level dependent the high est effects occur at high input levels while low signal levels are hardly affected The signal is scaled in the analyzer so that the average square magnitude of the error vec tor is minimized The Table 2 19 shows the signal after scaling Table 2 20 Amplitude transfer functions Amplitude transfer function transmitter Amplitude transfer function analyzer Table 2 20 sh...

Страница 59: ... high input levels while low signal levels are hardly affected These effects are caused for instance by saturation in the transmitter output stages The sig nal is scaled in the analyzer so that the average square magnitude of the error vector is minimized The Table 2 21 shows the signal after scaling Table 2 22 Phase transfer functions Nonlinear distortions phase distortion transmitter Phase disto...

Страница 60: ...iates from actual requirements The two effects described cannot be distinguished in the Constellation I Q diagram but in statistical and spectral analyses of the error signal 2 5 2 FSK Modulation Signal Model Frequency shift keying FSK involves the encoding of information in the frequency of a transmitted signal As opposed to other modulation formats such as PSK and QAM the FSK process is a non li...

Страница 61: ...finite and real valued constellation of M values ς1 ς2 ςM The maximum absolute constellation point is denoted by ςMAX The maximum phase contribution of a data symbol is given by dt t g h MAX MAX 2 The reference deviation of the FSK signal is defined as dt t g h T T MAX MAX REF 1 2 In the R S FSV K70 the frequency pulse filter is normalized such that 2 1 dt t g and the constellation for M FSK is as...

Страница 62: ...magni tude and phase frequency are present as well as additive noise The measured signal model is expressed as t n e t A t MEAS t j DIST DIST with n t is a disturbing additive noise process of unknown power ADIST t is the distorted magnitude model and φDIST t is the distorted phase model The magnitude model is given by t DIST e K t A with K is a constant scaling factor which can be interpreted as ...

Страница 63: ...on of the distortion parameters listed previously is performed separately for the magnitude and phase frequency distortions as illustrated in Figure 2 57 It is noted that the estimation of the timing offset is performed only on the frequency of the signal as the reference magnitude is assumed to be constant over the estimation range For details on the estimation range see Chapter 2 5 1 2 Estimatio...

Страница 64: ... 2 0 0 n E d REF MEAS d FREQ T n f f n f B n f f f B C with respect to the model parameters B f0 fd and τ The term denotes the reference instantaneous frequency with a possibly fractional delay of samples For FSK modulation the default sampling period used for estimation is the capture sampling period 2 5 2 3 Modulation Errors A 2FSK signal is generated using a GMSK frequency pulse Examples of car...

Страница 65: ...carrier fre quency drift FSK deviation error The FSK deviation error is the difference between the measured frequency deviation and the reference frequency deviation as entered by the user see FSK Ref Deviation on page 145 The evidence of a deviation error in the instantaneous frequency of an FSK signal is demonstrated in Figure 2 59 Signal Model Estimation and Modulation Errors ...

Страница 66: ...ctor Signal Analysis R S FSV K70 66 Operating Manual 1176 7578 02 09 Figure 2 59 The reference and measured instantaneous frequency of a GMSK signal with reference deviation error Signal Model Estimation and Modulation Errors ...

Страница 67: ...w are provided as descri bed for the base unit The MEAS key opens a submenu identical to the VSA menu and additionally dis plays the Chapter 3 3 1 6 Display Configuration on page 175 dialog box when pressed Measurement Result Display Various different result displays for VSA measurements are available The different dis play types are described in Chapter 3 1 Measurement Result Display on page 69 I...

Страница 68: ...he Meas Config Menu R S FSV K70 126 3 2 9 Softkeys of the Marker Menu R S FSV K70 128 3 2 10 Softkeys of the Marker To Menu R S FSV K70 130 3 2 11 Softkeys of the Lines Menu 132 3 2 12 Softkeys of the Input Output menu R S FSV K70 136 3 2 13 Softkeys of the Save Recall Menu R S FSV K70 139 3 2 14 Available Context Menus 140 3 3 Configuring VSA Measurements 141 3 3 1 Settings Overview 141 3 3 2 Def...

Страница 69: ...result range see Chapter 3 3 1 4 Result Range and Evaluation Range Settings on page 165 You can also define how detailed the trace is displayed Display Points Sym parameter in the Display Configuration dialog Distinction between Source Result type and Result type transformation The Display Config dialog provides the following settings Source Here you can choose the data source for which you want t...

Страница 70: ...Displayed Measurement Settings 102 Result Ranges and Evaluation Ranges 103 Saving Measurement Results 105 3 1 1 Result types The following result types are available depending on the source type Magnitude Absolute 70 Magnitude Relative 71 Phase Wrap 72 Phase Unwrap 73 Frequency Absolute 74 Frequency Relative 75 Real Imag I Q 76 Eye Diagram Real I 77 Eye Diagram Imag Q 78 Eye Diagram Frequency 79 C...

Страница 71: ...f Signal Figure 3 1 Result display Magnitude Absolute in normal mode SCPI commands CALC FEED XTIM DDEM MEAS to define the required source type see CALCulate n FEED on page 247 CALC FORM MAGN to define the result type see CALCulate n FORMat on page 247 TRAC DATA to query the trace results see TRACe n DATA on page 325 3 1 1 2 Magnitude Relative Magnitude of the source signal the signal amplitude is ...

Страница 72: ...7 DISP TRAC Y MODE REL to define relative values see DISPlay WINDow n TRACe t Y SCALe MODE on page 263 TRAC DATA TRACE1 to query the trace results see TRACe n DATA on page 325 3 1 1 3 Phase Wrap The phase or argument of the signal the display is limited to the phase value range of 180 180 t MEAS t PhaseMEAS with t n TD and TD the duration of one sampling period at the sample rate defined by the di...

Страница 73: ...DEM MEAS to define the required source type see CALCulate n FEED on page 247 CALC FORM PHASe to define the result type see CALCulate n FORMat on page 247 TRAC DATA TRACE1 to query the trace results see TRACe n DATA on page 325 3 1 1 4 Phase Unwrap The phase of the signal the display is not limited to 180 180 Available for source types Meas Ref Signal Measurement Result Display ...

Страница 74: ... page 247 TRAC DATA TRACE1 to query the trace results see TRACe n DATA on page 325 3 1 1 5 Frequency Absolute The instantaneous frequency of the signal source the absolute value is displayed in Hz Available for source types Meas Ref Signal Capture Buffer Meas Ref signal t MEAS dt d t FREQMEAS 2 1 with t n TD and TD the duration of one sampling period at the sample rate defined by the display point...

Страница 75: ...due to the fact that the phase of zero or a complex value close to zero is of limited significance but still influences the result of the instantaneous fre quency measurement Figure 3 5 Result display Frequency Absolute in normal mode SCPI commands CALC FEED XTIM DDEM MEAS to define the required source type see CALCulate n FEED on page 247 CALC FORM FREQ to define the result type see CALCulate n F...

Страница 76: ...eas Ref Signal Figure 3 6 Result display Frequency Relative in normal mode SCPI commands CALC FEED XTIM DDEM MEAS to define the required source type see CALCulate n FEED on page 247 CALC FORM FREQ to define the result type see CALCulate n FORMat on page 247 DISP TRAC Y MODE REL to define relative values see DISPlay WINDow n TRACe t Y SCALe MODE on page 263 TRAC DATA TRACE1 to query the trace resul...

Страница 77: ...commands CALC FEED XTIM DDEM MEAS to define the required source type see CALCulate n FEED on page 247 CALC FORM RIMag to define the result type see CALCulate n FORMat on page 247 TRAC DATA TRACE1 to query the trace results see TRACe n DATA on page 325 3 1 1 8 Eye Diagram Real I The eye pattern of the inphase I channel the x axis value range is from 1 to 1 sym bols MSK 2 to 2 Available for source t...

Страница 78: ... define the result type see CALCulate n FORMat on page 247 TRAC DATA TRACE1 to query the trace results see TRACe n DATA on page 325 3 1 1 9 Eye Diagram Imag Q The eye pattern of the quadrature Q channel the x axis range is from 1 to 1 sym bols MSK 2 to 2 Available for source types Meas Ref Signal Display lines are available in eye diagrams which allow you to determine the size of the eye see also ...

Страница 79: ...1 1 10 Eye Diagram Frequency Shows the eye diagram of the currently measured frequencies and or the reference signal The time span of the data depends on the evaluation range capture buffer Available for source types Meas Ref Signal Display lines are available in eye diagrams which allow you to determine the size of the eye see also Chapter 3 3 9 Measuring the Size of an Eye on page 200 SCPI comma...

Страница 80: ...ALC FEED XTIM DDEM MEAS to define the required source type see CALCulate n FEED on page 247 CALC FORM CONS to define the result type see CALCulate n FORMat on page 247 TRAC DATA TRACE1 to query the trace results see TRACe n DATA on page 325 3 1 1 12 Constellation I Q Rotated The complex source signal as an X Y plot As opposed to the common Constellation I Q display the symbol decision instants inc...

Страница 81: ... n FORMat on page 247 TRAC DATA TRACE1 to query the trace results see TRACe n DATA on page 325 3 1 1 13 Vector I Q The complex source signal as an X Y plot all available samples as defined by the dis play points per symbol parameter see Display Points Sym on page 179 are drawn and connected The scaling of the capture buffer is relative to the current reference level if you are using the RF input r...

Страница 82: ...define the result type see CALCulate n FORMat on page 247 TRAC DATA TRACE1 to query the trace results see TRACe n DATA on page 325 3 1 1 14 Constellation Frequency The instantenous frequency of the source signal without inter symbol interference as an X Y plot only the symbol decision instants are drawn and not connected Available for source types Meas Ref Signal SCPI commands CALC FEED XTIM DDEM ...

Страница 83: ...s defined by the display points per symbol parameter see Display Points Sym on page 179 are drawn and connected Available for source types Meas Ref Signal SCPI commands CALC FEED XTIM DDEM MEAS to define the required source type see CALCulate n FEED on page 247 CALC FORM COVF to define the result type see CALCulate n FORMat on page 247 TRAC DATA TRACE1 to query the trace results see TRACe n DATA o...

Страница 84: ...ace results see TRACe n DATA on page 325 3 1 1 17 Error Vector Magnitude EVM Displays the error vector magnitude as a function of symbols or time C t EV t EVM with t n TD and TD the duration of one sampling period at the sample rate defined by the display points per symbol parameter see Display Points Sym on page 179 The normalization constant C is chosen according to the EVM normalization By defa...

Страница 85: ...C FORM MAGN to define the result type see CALCulate n FORMat on page 247 TRAC DATA TRACE1 to query the trace results see TRACe n DATA on page 325 3 1 1 18 Magnitude Error Displays the magnitude error of the measurement signal with respect to the reference signal as a function of symbols over time t MAG t MAG t ERR MAG REF MEAS _ with t n TD and TD the duration of one sampling period at the sample ...

Страница 86: ...FORM MAGN to define the result type see CALCulate n FORMat on page 247 TRAC DATA TRACE1 to query the trace results see TRACe n DATA on page 325 3 1 1 19 Phase Error Displays the phase error of the measuremente signal with respect to the reference sig nal as a function of symbols over time t PHASE t PHASE t ERR PHASE REF MEAS _ with t n TD and TD the duration of one sampling period at the sample ra...

Страница 87: ...symbols over time t FREQ t FREQ t ERR FREQ REF MEAS _ with t n TD and TD the duration of one sampling period at the sample rate defined by the display points per symbol parameter see Display Points Sym on page 179 Note that this measurement does not consider a possible carrier frequency offset This has already been compensated for in the measurement signal This measurement is mainly of interest wh...

Страница 88: ...e error of the instantaneous frequency of the measurement signal with respect to the reference signal as a function of symbols over time The results are normalized to the symbol rate PSK and QAM modulated signals the estimated FSK deviation FSK modulated signals or one quarter of the symbol rate MSK modulated signals t FREQ t FREQ t ERR FREQ REF MEAS _ with t n TD and TD the duration of one sampli...

Страница 89: ...o define the result type see CALCulate n FORMat on page 247 DISP TRAC Y MODE REL to define relative values see DISPlay WINDow n TRACe t Y SCALe MODE on page 263 TRAC DATA TRACE1 to query the trace results see TRACe n DATA on page 325 3 1 1 22 Result Summary Shows the Modulation Accuracy results in a table Depending on the modulation type you are using the result summary shows different measurement...

Страница 90: ...r more information see Chapter A 1 2 1 PSK QAM and MSK Modulation on page 362 The following results are displayed EVM Error Vector Magnitude RMS Peak SCPI command CALCulate n MARKer m FUNCtion DDEMod STATistic EVM on page 224 MER Modulation Error Ratio RMS Peak SCPI command CALCulate n MARKer m FUNCtion DDEMod STATistic SNR on page 234 Phase Error RMS Peak SCPI command CALCulate n MARKer m FUNCtio...

Страница 91: ...DDEMod STATistic QERRor on page 232 Amplitude Droop SCPI command CALCulate n MARKer m FUNCtion DDEMod STATistic ADRoop on page 222 Power SCPI command CALCulate n MARKer m FUNCtion DDEMod STATistic MPOWer on page 230 For each result the R S FSVA FSV calculates and shows various statistical values Current value Mean value To calculate the mean value the R S FSVA FSV averages the number of results de...

Страница 92: ...Error Shows the deviation error of FSK modulated signals in Hz The FSK deviation error is the difference of the FSK deviation of the measured signal and the FSK refer ence deviation you have set SCPI command CALCulate n MARKer m FUNCtion DDEMod STATistic FDERror on page 225 FSK Meas Deviation Shows the estimated deviation of FSK modulated signals in Hz SCPI command CALCulate n MARKer m FUNCtion DD...

Страница 93: ...ror Phase Error Power Magnitude Error Rho Power The following results that are based on internal estimation algorithms see Chapter 2 5 Signal Model Estimation and Modulation Errors on page 50 are calculated over the Estimation range see also Chapter 2 5 1 2 Estimation on page 52 Table 3 2 Results calculated over the estimation range PSK MSK QAM FSK Carrier Frequency Error FSK Deviation Error I Q O...

Страница 94: ...ent column is displayed Note that if the values are in a logarithmic representation e g the I Q Off set the linear values are averaged Peak value In the Peak column the maximum value that occurred during several evaluations is displayed Note that when the value can be positive and negative e g the phase error the maximum absolute value maintaining its sign is displayed The peak value of Rho is han...

Страница 95: ...t the R S FSV K70 application must know which bit sequences are correct i e which bit sequences may occur This knowledge must be provided as a list of possible data sequences in xml format which is loaded in the R S FSV K70 see Chapter 3 3 7 Working With Known Data Files on page 194 If such a file is loaded in the application the BER result display is available Available for source types Modulatio...

Страница 96: ...nt value during the current measurement Accumulative Total value over several measurements for BER Total of Errors Total of Bits similar to average function SCPI commands CALC FEED XTIM DDEM MACC to define the required source type see CALCulate n FEED on page 247 CALC FORM BER to define the result type see CALCulate n FORMat on page 247 CALC BER to query the results see CALCulate n BERate on page ...

Страница 97: ...r I Q Constellation Frequency Vector Frequency Symbols Binary Octal Decimal Hexadecimal Error Vector EVM Real Imag I Q Vector I Q Modulation Errors Magnitude Error Phase Error Frequency Error Absolute Frequency Error Relative Modulation Accuracy Result Summary Bit Error Rate BER 3 1 3 Spectral Displays Spectral evaluations can be carried out for all result displays that show the time or symbols on...

Страница 98: ...ult display is too long the total length is divided into several subblocks of 4096 points each and the results are averaged The subblocks overlap each other by 25 of the block length In addi tion the input signal or the subblocks are evaluated with a FLATTOP window If the valuation range is active the FLATTOP window is also restricted to the area inside the evaluation lines Following the FFT the s...

Страница 99: ...Instrument Functions for Vector Signal Analysis R S FSV K70 99 Operating Manual 1176 7578 02 09 Figure 3 19 Spectrum diagram Single sided display for real input signals Measurement Result Display ...

Страница 100: ...e x axis They show the distribution i e probabilities of occurrence of the values as a set of bars Note that only samples within the evaluation range contribute to the statistic measure ment In all statistical displays a vertical line shows the value of the 95 percentile Table 3 5 Available statistical displays depending on source type Source Type Result Type Capture Buffer Magnitude Absolute Real...

Страница 101: ...tistics dia gram is calculated for the real and imaginary parts The input signal of the basic display is quantized and the probability of occurrence is shown by a bargraph The quantization can be set via the number of bars in the display area by using the Range X Axis Quantize parameter see Ranges statistic mea surements on page 112 In the basic setting 101 bars are used The Figure 3 21 shows an e...

Страница 102: ...ending on the result type the following information may be displayed in the channel bar Editing settings in the channel bar Some settings that are displayed in the channel bar can easily be edited by touching the setting in the display with a finger or mouse pointer The corresponding edit dia log box is displayed in which you can edit the setting For some settings a context sensitive menu is also ...

Страница 103: ...earch active see Auto On Off on page 161 Stat Count Statistics count for averaging and other statistical operations see Statistics Count on page 119 cannot be edited directly Capt Count Capture count the current number of captures performed if several captures are necessary to obtain the number of results defined by Statistics Count cannot be edited directly For more information on general measure...

Страница 104: ...on a single result range such as the EVM vs Time display or the data in the Current column of the Result Summary In this case you can use the capture buffer display to navigate through the available result ranges Select Result Rng softkey and analyze the indi vidual result ranges in another window The currently displayed result range is indica ted by a blue bar in the capture buffer display Evalua...

Страница 105: ...ts for further evaluation or documentation purposes You can save a screenshot of the display to a file or print it and you can export the trace data in ASCII format To print or store a screenshot 1 Press the PRINT key 2 Press the Device Setup softkey 3 To copy the screenshot to the clipboard or print it on a printer select the corre sponding option Before you print to a printer make sure a printer...

Страница 106: ... Q data to a file and reload it on the instrument again later 1 Select a window that displays I Q data 2 Press the SAVE RCL hardkey and then the Save softkey 3 Define a file name for the data file 4 Select IQ Data from the list of items to be stored 5 Press Save to close the dialog and store the data to the file 6 To load the data again later press the SAVE RCL hardkey and then the Load softkey Se...

Страница 107: ... menu R S FSV K70 107 Softkeys of the Frequency Menu R S FSV K70 110 Softkeys of the Amplitude Menu R S FSV K70 110 Softkeys of the Auto Set Menu R S FSV K70 116 Softkeys of the Sweep Menu R S FSV K70 118 Softkeys of the Trace Menu R S FSV K70 120 Softkeys of the Trigger Menu R S FSV K70 124 Softkeys of the Meas Config Menu R S FSV K70 126 Softkeys of the Marker Menu R S FSV K70 128 Softkeys of th...

Страница 108: ...on of the individual dialog boxes see Chapter 3 3 1 Settings Overview on page 141 Digital Standards Opens a submenu and a file selection dialog to manage predefined measurement set tings for conventional mobile radio standards See Managing standard settings files for details For an overview of predefined standards and settings see Chapter B Predefined Standards and Settings on page 375 Load Standa...

Страница 109: ... at the time of deliv ery Remote command SENSe DDEMod FACTory VALue on page 286 New Folder Digital Standards Creates a new folder in the file system in which you can save the settings file This function is only available if the Save Current Settings as Standard dialog box is open Display Config Opens the Display Configuration dialog box to configure the measurement results display See Chapter 3 3 ...

Страница 110: ... define the fixed step size for the center frequency The softkey indicates the current setting This function is only available if Stepsize Auto Man on page 110 is set to Man Remote command SENSe FREQuency CENTer STEP on page 316 Frequency Offset Opens an edit dialog box to enter a frequency offset that shifts the displayed frequency range by the specified offset The softkey indicates the current f...

Страница 111: ...erence level in dBm The reference level value is the maximum value the AD converter can handle without distortion of the measured value Signal levels above this value will not be measured correctly which is indicated by the IFOVL status display To get an ideal reference level use Auto Level function For more information see Auto Level on page 117 Remote command DISPlay WINDow n TRACe t Y SCALe RLE...

Страница 112: ...e 265 Y Axis Autorange Ranges Adapts the y axis to the current measurement results only once not dynamically in the focussed window To adapt the range of all screens together use the Y Axis Auto Range All Screens function For more information see Y Axis Auto Range All Screens on page 118 Remote command DISPlay WINDow n TRACe t Y SCALe AUTO VALue on page 263 Ranges statistic measurements Opens a su...

Страница 113: ...atistic measurements Defines the scaling type of the y axis The default value is absolute scaling Remote command CALCulate n STATistics SCALe Y UNIT on page 252 Default Settings Ranges statistic measurements Resets the x and y axis scalings to their preset values for the current measurement window Remote command CALCulate n STATistics PRESet on page 251 Adjust Settings Ranges statistic measurement...

Страница 114: ...2 is installed the preamplifier is only active below 7 GHz If option R S FSV B24 is installed the preamplifier is active for all frequencies This function is not available for input from the R S Digital I Q Interface option R S FSV B17 Remote command INPut GAIN STATe on page 276 RF Atten Manual Mech Att Manual Opens an edit dialog box to enter the attenuation irrespective of the reference level If...

Страница 115: ... Att Auto softkeys To define the electronic attenuation use the El Atten Mode Auto Man softkey Note This function is not available for stop frequencies or center frequencies in zero span 7 GHz In this case the electronic and mechanical attenuation are summarized and the electronic attenuation can no longer be defined individually As soon as the stop or center frequency is reduced below 7 GHz this ...

Страница 116: ...igital I Q Interface option R S FSV B17 Remote command INPut COUPling on page 271 Bypassing the YIG Filter If the option R S FSVA B11 is installed the YIG preselector can be bypassed This function is only available for R S FSVA instruments If the YIG preselector at the input of the R S FSVA is removed from the signal path you can use the maximum bandwidth for signal analysis However image frequenc...

Страница 117: ...mote command SENSe ADJust CONFigure LEVel DURation on page 284 Meas Time Auto Settings The level measurement is used to determine the optimal reference level automatically see the Auto Level softkey This softkey resets the level measurement duration for automatic leveling to the default value depending on the signal description see Signal Description on page 146 Upper Level Hysteresis Settings Def...

Страница 118: ...tinuous Sweep Sets the continuous sweep mode the sweep takes place continuously according to the trigger settings This is the default setting The trace averaging is determined by the Statistic Count Remote command INIT CONT ON see INITiate n CONTinuous on page 269 Single Sweep Sets the single sweep mode after triggering starts the number of sweeps that are defined by using the Statistic Count soft...

Страница 119: ...p mode captures the I Q data once and evaluates it In continuous sweep mode captures I Q data continuously for each evaluation the average is calculated over the last 10 capture sets moving average Manual In single sweep mode captures I Q data until the defined number of evaluations have been performed In continuous sweep mode captures I Q data continuously if trace averaging is selected the avera...

Страница 120: ...If you right click on a trace in the display or a trace setting in the information channel bar or touch it for about 1 second a menu is displayed which corresponds to the softkey functions available for traces Trace 1 Trace 2 Trace 3 Trace 4 Trace 5 Trace 6 120 Clear Write 121 Max Hold 121 Min Hold 121 Average 121 View 121 Blank 122 Evaluation Meas Ref 122 Trace Wizard 122 Trace Mode 122 Evaluatio...

Страница 121: ...e 6 The minimum value is determined from several measurements and displayed The R S FSVA FSV saves the smallest of the previously stored currently measured values in the trace memory This mode is useful e g for making an unmodulated carrier in a composite signal visi ble Noise interference signals or modulated signals are suppressed whereas a CW signal is recognized by its constant level This mode...

Страница 122: ...ce 4 Trace 5 Trace 6 Hides the selected trace Remote command DISP TRAC OFF see DISPlay WINDow n TRACe t STATe on page 260 Evaluation Meas Ref Trace 1 Trace 2 Trace 3 Trace 4 Trace 5 Trace 6 Defines whether the trace displays the evaluation of the measured signal or the refer ence signal if Meas Ref Signal is used as the signal source see Source on page 177 Remote command CALCulate n TRACe t VALue ...

Страница 123: ...Blank For details see Chapter 3 4 1 Trace Mode Overview on page 201 Select Max Avg Min Trace Wizard Configures several traces to predefined display modes in one step Trace 1 Max Hold Trace 2 Average Trace 3 Min Hold Trace 4 6 Blank For details see Chapter 3 4 1 Trace Mode Overview on page 201 Select Max ClrWrite Min Trace Wizard Configures several traces to predefined display modes in one step Tra...

Страница 124: ...er Offset Unit 126 Free Run The start of a sweep is not triggered Once a measurement is completed another is started immediately Remote command TRIG SOUR IMM see TRIGger n SEQuence SOURce on page 331 External Defines triggering via a TTL signal at the EXT TRIG GATE IN input connector on the rear panel Remote command TRIG SOUR EXT see TRIGger n SEQuence SOURce on page 331 IF Power Baseband Power De...

Страница 125: ...te command TRIGger n SEQuence LEVel IFPower on page 329 For digital input via the R S Digital I Q Interface R S FSV B17 TRIGger n SEQuence LEVel BBPower on page 328 Trigger Polarity Sets the polarity of the trigger source The sweep starts after a positive or negative edge of the trigger signal The default set ting is Pos The setting applies to all modes with the exception of the Free Run and Time ...

Страница 126: ...n page 330 Trigger Offset Unit Toggles between symbols and seconds as the trigger offset unit 3 2 8 Softkeys of the Meas Config Menu R S FSV K70 The Meas Config menu provides functions for measurement configuration Settings Overview 126 Modulation Signal Description 126 Frontend 127 I Q Capture 127 Config Pattern 127 Burst Pattern Search 127 Range Settings 127 Demod Meas Filter 128 Display Config ...

Страница 127: ...see Frontend on page 149 I Q Capture Displays the I Q Capture tab of the Frontend I Q Capture Settings dialog box A live preview of the signal in the capture buffer with the current settings is displayed in the preview area at the bottom of the dialog box The preview area is not editable directly Note that this works only in continuous sweep mode For details on the available settings see I Q Captu...

Страница 128: ...isplays the Marker menu which contains the following softkeys Marker 1 2 3 4 128 Marker Norm Delta 128 Couple Screens On Off 129 Link Mkr1 and Delta1 129 Marker to Trace 130 All Marker Off 130 Marker 1 2 3 4 Selects the corresponding marker and activates it Marker 1 is always a normal marker After Marker 2 to 4 have been switched on they are delta markers that are referenced to Marker 1 These mark...

Страница 129: ...ed diagrams Figure 3 25 Coupled markers in screens A B and D Remote command CALCulate n MARKer m LINK on page 234 Link Mkr1 and Delta1 The delta marker 1 is linked to marker 1 so if the x axis value of the marker 1 is changed the delta marker 1 will follow on the same x position The link is off by default You can set the two markers on different traces to measure the difference e g between a max h...

Страница 130: ... 130 Move Marker to Trace 131 Search Settings 131 Search Direction 131 Marker Real Marker Imag 131 Search Limits 131 Peak 131 Next Peak 131 Max Peak 132 Min 132 Next Min 132 Select 1 2 3 4 Selects the normal marker or the delta marker and activates the marker stands for delta marker 1 CALCulate n MARKer m STATe on page 238 CALCulate n MARKer m X on page 239 CALCulate n MARKer m Y on page 241 Selec...

Страница 131: ...arch functions are performed on the real or imaginary trace of the Real Imag measurement Remote command CALCulate n MARKer m SEARch on page 238 Search Limits Search Settings If enabled defines the limits of the search Left Limit Lowest symbol number for which the search is performed Right Limit Highest symbol number for which the search is performed Use Zoom Limits Restricts the marker search to t...

Страница 132: ...S key Tasks Chapter 3 3 8 Working with Limits for Modulation Accuracy Measurements on page 199 Vertical Line 132 Horizontal Line 133 ModAcc Limits 133 Config ModAcc Limits 133 Limit Checking 134 Set to Default 134 Current Mean Peak 134 Limit Value 135 Check 135 Vertical Line Displays an absolute or relative vertical line in an eye diagram see Chapter 3 1 1 Result types on page 70 A relative line i...

Страница 133: ...the y value at the first line is also indicated The unit of the vertical lines depends on the unit of the y axis in the diagram If you position the lines at the top and the bottom of the eye the relative line value rep resents the height of the eye see also Chapter 3 3 9 Measuring the Size of an Eye on page 200 Remote command CALCulate n DLABs STATe on page 244 CALCulate n DLABs VALue on page 244 ...

Страница 134: ... Activates or deactivates a limit check on the subsequent measurements Remote command CALCulate n LIMit MACCuracy STATe on page 215 Set to Default Config ModAcc Limits Restores the default limits and deactivates all checks Remote command CALCulate n LIMit MACCuracy DEFault on page 214 Current Mean Peak Config ModAcc Limits Define and activate the limits for the currently measured value the mean an...

Страница 135: ...it MACCuracy MERRor PCURrent VALue on page 219 Carr Freq Err CALCulate n LIMit MACCuracy CFERror CURRent VALue on page 217 Rho CALCulate n LIMit MACCuracy RHO CURRent VALue on page 221 IQ Offset CALCulate n LIMit MACCuracy OOFFset CURRent VALue on page 220 FSK modulation only Freq Err Rms CALCulate n LIMit MACCuracy FERRor RCURrent VALue on page 219 Freq Err Peak CALCulate n LIMit MACCuracy FERRor...

Страница 136: ... Radio Frequency or the Digital IQ input path is used for measurements Digital IQ is only available if option R S FSV B17 R S Digital I Q Interface is installed Note Note that the input path defines the characteristics of the signal which differ sig nificantly between the RF input and digital input Remote command INPut SELect on page 277 Connected Device Signal Source Displays the name of the devi...

Страница 137: ...talled the submenu consists only of one key to access the software Note that R S DigIConf requires a USB connection not LAN from the R S FSVA FSV to the R S EX IQ BOX in addition to the R S Digital I Q Interface connection R S DigIConf version 2 10 or higher is required For typical applications of the R S EX IQ BOX see also the description of the R S Digital I Q Interface R S FSV B17 in the base u...

Страница 138: ...th the EXIQ menu regardless of which key was pressed For details on the R S DigIConf application see the R S EX IQ BOX Digital Inter face Module R S DigIConf Software Operating Manual Note If you close the R S DigIConf window using the Close icon the window is minimized not closed If you select the File Exit menu item in the R S DigIConf window the application is closed Note that in this case the ...

Страница 139: ...includes Device identification Used port Maximum digital input output sample rates and maximum digital input output transfer rates Status of the connection protocol Status of the PRBS descewing test For details see Interface Status Information in Instrument Functions R S Digital I Q Interface Option R S FSV B17 in the description of the base unit Remote command INPut DIQ CDEVice on page 272 3 2 13...

Страница 140: ...ion is only available in single sweep mode For details see the description in the base unit Importing and Exporting I Q Data Remote command MMEMory STORe IQ STATe on page 278 MMEMory STORe IQ COMM on page 278 R S Support Export Stores useful information for troubleshooting in case of errors This data is stored in the C R_S Instr user Support directory on the instru ment The SupportSave dfl file co...

Страница 141: ...n be stored for recurrent use Thus configuring VSA measurements requires one of the following tasks Selecting an existing standard settings file and if necessary adapting the mea surement settings to your specific requirements Configuring the measurement settings and if necessary storing the settings in a file Settings Overview 141 Defining the Result Range 181 Changing the Display Scaling 184 Man...

Страница 142: ...and Evaluation Range Settings 165 Demodulation and Measurement Filter Settings 169 Display Configuration 175 3 3 1 1 Modulation and Signal Description Settings You describe the properties of the signal to be measured in the Modulation and Signal Description Settings dialog box This dialog box is displayed when you select Modu lation Signal Description in the Settings Overview The dialog box contai...

Страница 143: ... settings is displayed at the bottom of the dialog box to visu alize the changes to the settings The preview area is not editable directly Modulation Type 143 Modulation Order 144 FSK Ref Deviation 145 Modulation Mapping 145 Symbol Rate 145 Transmit filter Type 145 Load User Filter 145 Alpha BT 146 Modulation Type Defines the modulation type of the vector signal The following types are available P...

Страница 144: ...e Available orders PSK BPSK QPSK Offset QPSK DQPSK 3Pi 4 QPSK Pi 4 DQPSK 8PSK D8PSK 3Pi 8 8PSK Pi 8 D8PSK Pi 4 QPSK MSK MSK DMSK QAM 16QAM Pi 4 16QAM 32QAM Pi 4 32QAM 64QAM 128QAM 256QAM FSK 2FSK 4FSK 8FSK 16FSK UserQAM 2ary 4ary 16ary 32ary Remote command SENSe DDEMod PSK FORMat on page 297 SENSe DDEMod QPSK FORMat on page 299 SENSe DDEMod MSK FORMat on page 292 Configuring VSA Measurements ...

Страница 145: ...e Modulation Type and Modulation Order For more information on the modulation mapping refer to Chapter 2 3 Symbol Mapping on page 21 Remote command SENSe DDEMod MAPPing VALue on page 290 SENSe DDEMod MAPPing CATalog on page 290 Symbol Rate The symbol rate also determines the I Q bandwidth of the data recording and demodu lation You can change the default rate by entering a value in Hz For details ...

Страница 146: ...ilable for RRC filter Remote command Transmit filter SENSe DDEMod FILTer ALPHa on page 286 Measurement filter SENSe DDEMod MFILter ALPHa on page 291 Signal Description The settings in the Signal Description tab of the Modulation Signal Description dialog box describe the expected input signal and determine which settings are availa ble for configuration You can define a Pattern to which the instru...

Страница 147: ...he burst excluding its Run In Out areas Hence this parameter also allows for demodulation of bursts with mixed modulations e g Bluetooth because it can be used to explicitely exclude symbols from influencing the synchronization Remote command SENSe DDEMod SIGNal VALue on page 312 Pattern If enabled the instrument expects the signal to contain a pattern Note The pattern search itself must be enable...

Страница 148: ...n search and enhance the accuracy of the burst search Remote command SENSe DDEMod STANdard SYNC OFFSet STATe on page 313 SENSe DDEMod STANdard SYNC OFFSet VALue on page 314 Known Data In the Known Data tab of the Modulation Signal Description dialog box you can load a file that describes the possible data sequences in the input signal see Chap ter 3 3 7 Working With Known Data Files on page 194 Ad...

Страница 149: ...vated this function displays a file selection dialog box to select the xml file that contains the known data Once a file has been selected any additional information provided by the file is displayed at the bottom of the dialog box Remote command SENSe DDEMod KDATa NAME on page 290 3 3 1 2 Frontend and I Q Capture Settings You configure the measurement of the actual input signal in the Frontend an...

Страница 150: ...ation Mode 152 RF Attenuation 152 El Attenuation ON OFF 152 Frequency Defines the center frequency The allowed range of values for the center frequency depends on the frequency span span 0 spanmin 2 fcenter fmax spanmin 2 span 0 0 Hz fcenter fmax fmax and spanmin are specified in the data sheet Remote command SENSe FREQuency CENTer on page 316 Reference Level Defines the reference level in dBm Con...

Страница 151: ... the preamplifier is only active below 7 GHz If option R S FSV B24 is installed the preamplifier is active for all frequencies This function is not available for input from the R S Digital I Q Interface option R S FSV B17 Remote command INPut GAIN STATe on page 276 Input Coupling Toggles the RF input of the R S FSVA FSV between AC and DC coupling Remote command INPut COUPling on page 271 Bypassing...

Страница 152: ...dB can only be entered via the numeric keypad or via remote control command in order to protect the input mixer against overload The RF attenuation defines the level at the input mixer according to the formula levelmixer levelinput RF attenuation The maximum mixer level allowed is 10 dBm Mixer levels above this value may lead to incorrect measurement results which are indicated by the OVLD status ...

Страница 153: ...h the current settings is displayed in the preview area at the bottom of the dialog box The preview area is not editable directly Capture Length Auto 154 Capture Length 154 Capture Oversampling 154 Sample Rate 154 Usable I Q Bandwidth 155 Maximum Bandwidth 155 Swap I Q 155 Trigger Mode 155 Trigger Offset 156 Trigger Level 157 Trigger Polarity 157 Trigger Hysteresis 157 Trigger Holdoff 157 Configur...

Страница 154: ...th If the bandwidth is too narrow the signal is not displayed completely If the bandwidth is too wide interference from out side the actual signal to be measured can distort the result Thus for signals with a large frequency spectrum e g FSK modulated signals a higher capture oversampling rate may be necessary For an indication of the required capture oversampling value view the Real Imag I Q disp...

Страница 155: ...see Chapter 2 2 2 1 Restrictions on page 14 Thus sample rates up to 1 28 GHz and an I Q bandwidth up to 160 MHz are possible Note that using the bandwidth extension may cause more spurious effects 40 MHz Deactivates use of the bandwidth extension option R S FSV B160 thus reducing possible spurious effects while restricting the analysis bandwidth to 40 MHz Sample rates higher than 128 MHz can only ...

Страница 156: ...ay vary considerably for the same RBW setting The R S FSVA FSV is triggered as soon as the trigger level is exceeded around the selected frequency start frequency in the fre quency sweep Free Run The start of a sweep is not triggered Once a measurement is com pleted another is started immediately Remote command TRIGger n SEQuence SOURce on page 331 TRIGger n SEQuence LEVel IFPower on page 329 For ...

Страница 157: ...the logical 1 signal after the gate delay time has elapsed Neg Edge triggering the sweep is continued on a 0 to 1 transition for the gate length duration after the gate delay time has elapsed Remote command TRIGger n SEQuence SLOPe on page 330 Trigger Hysteresis Defines the value for the trigger hysteresis for IF power or RF Power trigger sour ces The hysteresis in dB is the value the input signal...

Страница 158: ...st searches In addition it contains a link to the Signal Description settings see Signal Description on page 146 A live preview of the capture buffer with the current settings is displayed in the preview area at the bottom of the dialog box The green bar below the trace indicates the defined evaluation range see Evaluation Range on page 167 The preview area is not editable directly The Burst Searc...

Страница 159: ...ation Defines the number of symbols that may differ from the burst length without influencing the burst detection A search tolerance of 5 for example with a minimum and maxi mum burst length of 100 will detect bursts that are 95 to 100 symbols long Note that due to the fact that the VSA does not have knowledge of the ramp length there is an uncertainty in the burst search algorithm Thus setting th...

Страница 160: ...l Description settings see Signal Description on page 146 For details on pattern searches see Chapter 3 3 5 Working with Pattern Searches on page 189 Auto On Off 161 Meas only if pattern symbols correct 161 Auto Configuration 161 I Q Correlation Threshold 161 Select Pattern for Search 161 Advanced Settings 162 Prefix 162 Show Compatible 162 Show All 162 Pattern Search On 162 Meas only if pattern s...

Страница 161: ...emote command SENSe DDEMod SEARch PATTern CONFigure AUTO on page 305 I Q Correlation Threshold Auto Configuration The I Q correlation threshold decides whether a match is accepted or not during a pat tern search see also Chapter 3 3 5 Working with Pattern Searches on page 189 If the parameter is set to 100 only I Q patterns that match totally with the input signal are found This is only the case f...

Страница 162: ...y focussed pattern are displayed at the upper right hand side of the dialog box You can refer to these details for example when you want to add a new pattern to the standard and want to make sure you have selected the correct one Prefix Advanced Settings Shows only patterns that contain the specified prefix Show Compatible Advanced Settings Shows only patterns that are compatible to the selected m...

Страница 163: ...ndard Patterns list but not deleted Remote command SENSe DDEMod SEARch SYNC PATTern REMove on page 310 Edit Advanced Settings Opens the Edit Pattern dialog box to edit the pattern definition See Pattern Defini tion on page 164 For details on defining a pattern see Example Defining a pattern on page 192 Remote command SENSe DDEMod SEARch SYNC NAME on page 309 SENSe DDEMod SEARch SYNC COMMent on pag...

Страница 164: ...ng a pattern see Example Defining a pattern on page 192 Name 164 Description 164 Mod order 165 Symbol format 165 Symbols 165 Comment 165 Name Pattern name that will be displayed in selection list Remote command SENSe DDEMod SEARch SYNC NAME on page 309 Description Optional description of the pattern which is displayed in the pattern details Remote command SENSe DDEMod SEARch SYNC TEXT on page 311 ...

Страница 165: ...on Range Settings You configure the result range and evaluation range settings in the Result Range Alignment and Evaluation Range dialog box This dialog box contains the following tabs Result Range on page 165 Evaluation Range on page 167 Result Range The Result Range tab contains the settings for the result range The result range determines which part of the capture buffer burst or pattern is dis...

Страница 166: ... 100 symbols and you define the result length as 200 symbols you can examine the burst ramps in detail by selecting the alignment Burst Center The maximum result length depends on the CPU board indicated in SETUP Sys tem Info Hardware Info FMR 7 10000 symbols others 20000 symbols Remote command SENSe DDEMod TIME on page 315 Reference Defines the reference for the result range alignment The result ...

Страница 167: ...mbol which marks the beginning of the alignment refer ence source burst capture or pattern In effect this setting defines an offset of the x axis in addition to the one defined for the Signal Description see Offset on page 148 For example if you align the result to the center of the pattern and set the Symbol Number at lt Reference gt start to 0 you can easily find the pattern start in the EVM mea...

Страница 168: ...ange Note Note that the start value is defined with respect to the x axis including an optional offset defined via the Symbol Number at Reference start parameter Remote command CALCulate n ELIN startstop VALue on page 246 Stop Defines the symbol in the result range at which evaluation is stopped The stop symbol itself is included in the evaluation range Note Note that the stop value is defined wit...

Страница 169: ...n the Demodulation Measurement Filter dialog box This dialog box contains the following tabs Demodulation on page 169 Measurement Filter on page 174 Demodulation The Demodulation tab contains the settings for the demodulation A live preview of the trace with the current settings is displayed in the preview area at the bottom of the dialog box The preview area is not editable directly Configuring V...

Страница 170: ...s Sym 172 Coarse Synchronization 172 Fine Synchronization 173 If SER 173 Compensate for If enabled compensation for various effects is taken into consideration during demodu lation Note Note that compensation for all the listed distortions can result in lower EVM val ues For PSK QAM MSK modulation I Q Offset I Q Imbalance Amplitude Droop For FSK modulation FSK Deviation Error Carrier Frequency Dri...

Страница 171: ...SENSe DDEMod NORMalize FDERror on page 293 Normalize EVM to Normalizes the EVM to the specified power value This setting is not available for MSK or FSK modulation Max Ref Power Maximum power of the reference signal at the symbol instants Mean Ref Power mean power of the reference signal at the symbol instants Mean Constellation Power Mean expected power of the measurement signal at the symbol ins...

Страница 172: ...manually or let the R S FSVA FSV decide which estima tion points to use If you define the estimation points manually you can set the estimation points to 1 or 2 per symbol or the value of the Capture Oversampling per symbol Setting the estima tion points to 1 means that the estimation algorithm takes only the symbol time instants into account while setting the estimation points to Capture Oversamp...

Страница 173: ...e set to the length of the refer ence area The reference area can be defined either using a pattern or using a known data sequence from a Known Data file If no predefined data sequences are available for the signal the detected data is used by default If Auto mode is selected and a Known Data file has been loaded and activated for use the known data sequences are used Otherwise the detected data i...

Страница 174: ...n Settings dialog box is provided see Modulation on page 143 A live preview of the trace with the current settings is displayed in the preview area at the bottom of the dialog box The preview area is not editable directly For details on measurement filters see Chapter 2 2 6 Measurement Filters on page 17 The Measurement Filter tab is also displayed when you select the Demod Meas Fil ter softkey in...

Страница 175: ... the name of the measurement filter Load User Filter Type Opens a file selection dialog box to select the user defined measurement filter to be used For details see Chapter 2 2 7 Customized Filters on page 19 Remote command SENSe DDEMod MFILter NAME on page 291 Alpha BT Defines the roll off factor Alpha or the filter bandwidth BT The roll off factor and filter bandwidth for Transmit filter is avai...

Страница 176: ...ult Type 177 Result Type Transformation 178 Display Points Sym 179 Oversampling 180 Screen X active If enabled the screen the tab corresponds to is displayed If fewer than 4 screens are enabled the remaining screens are enlarged to make best use of the available display Remote command DISPlay WINDow n STATe on page 259 Highlight Symbols If enabled the symbol instants are highlighted as squares in ...

Страница 177: ...n errors due to different complex samples in the measurement and the ref erence signal Modulation measurement signal Modulation reference signal For example Magnitude Error Mag meas Mag ref Modulation Accu racy Category for measurements that provide a summary on the modulation accuracy e g the Result Summary Remote command CALCulate n FEED on page 247 Result Type Defines how the signal source is e...

Страница 178: ...tude Error Phase Error Frequency Error Absolute Frequency Error Relative Modulation Accuracy Result Summary Remote command CALCulate n FORMat on page 247 Result Type Transformation The result type transformation parameters set the evaluation method of the measure ment results These settings are not available for the following source types see Source on page 177 Symbols Modulation Accuracy For more...

Страница 179: ...re displayed per symbol the more detailed the trace becomes Note If the Capture Buffer is used as the signal source the Capture Oversampling rate defines the number of displayed points per symbol the Display Points Sym parameter is not available If Auto is enabled the Capture Oversampling value is used Alternatively select the number of points to be displayed per symbol manually The available valu...

Страница 180: ...ts Screen B statistics for symbol instants only Symbols only Statistics are calculated for symbol instants only See screen B in Statistics measurement Screen C measured signal symbols highlighted Screen A statistics for all trace points Screen B statistics for symbol instants only Infinite Statistics are calculated for all trace points symbol instants and inter mediate times See screen A in Statis...

Страница 181: ...og box to enter a name for the current screen configuration The configuration is then stored and added to the list Apply Applies the currently selected configuration from the list to the current display Remove Removes the currently selected configuration from the list Restore Restores the default Display Configuration Existing settings with the default names are replaced 3 3 2 Defining the Result ...

Страница 182: ... on page 194 2 Define the Reference for the result range i e the source to which the result will be aligned see Reference on page 166 The reference can be the captured data a detected burst or a detected pattern 3 Define the Alignment of the result range to the reference source i e whether the result starts at the beginning of the reference source ends with the reference source or is centered with...

Страница 183: ...axis in capture buffer result displays see Chapter 3 1 6 Result Ranges and Evaluation Ranges on page 103 Defining an Evaluation Range By default the entire result range is used for evaluation If necessary you can define an evaluation range that differs from the result range For example you can exclude the ramps of a burst for evaluation The used evaluation range is indicated in the result display ...

Страница 184: ...ctrum Diagrams The range of the displayed y axis for time and spectral diagrams can be defined in the following ways manually by defining the range size reference values and positions automatically according to the current results To define the scaling manually using a reference point With this method you define a reference value and a position at which this value is to be displayed on the y axis ...

Страница 185: ...c diagrams show the distribution i e probabilities of occurrence of the values as a set of bars You can define the number of bars to be displayed i e the granularity of classifications Additionally you can specify whether absolute or percentage values are displayed For statistics measurements both the x axis and the y axis can be scaled to optimize the display The range of the displayed x axis for...

Страница 186: ...screen 2 Select AMPT Ranges X Axis Reference Value see X Axis Reference Value on page 112 3 Enter a reference value on the x axis in the current unit The y axis is adapted so that it crosses the x axis at the reference value Example If you want to analyze the probabilities of occurrence for errors greater than 95 enter the reference value 95 Figure 3 33 Defining the x axis scaling using a referenc...

Страница 187: ...limit in the current unit The y axis is adapted to display the specified range Probabilities of occurrence located outside the display area are applied to the bars at the left or right borders of the display To restore the default scaling settings 1 Focus the result screen 2 Select AMPT Ranges Default Settings see Default Settings on page 113 The x and y axis scalings are reset to their default va...

Страница 188: ...w Folder dialog box 4 Press the Save button The dialog box is closed and the current measurement settings are stored in a standard file To delete standard files 1 In the Digital Standards file selection dialog box select the standard whose set tings file you want to delete Standards predefined by Rohde Schwarz can also be deleted To change the path press the arrow icons at the right end of the Pat...

Страница 189: ...e K70 option can then adapt its result range to this pattern Predefined Patterns Common standards usually have predefined pattern lists with standard specific pat terns Patterns required for the current measurement can be selected from this list This list can be extended by patterns that are already available in the instrument Newly created patterns can also be added to the list Pattern Settings T...

Страница 190: ... pattern that is assigned to the currently defined standard If the pattern you require is not available see To add a predefined pattern to a standard on page 191 To enable a pattern search This task can also be performed by remote control see SENSe DDEMod SEARch SYNC STATe on page 311 1 If the Advanced Pattern Settings dialog box is already displayed select the Pat tern Search On option Otherwise ...

Страница 191: ...rns 1 In the VSA Settings Overview dialog box select Signal Description 2 Press Pattern Settings 3 To display all available patterns select Show All To display all patterns that are compatible to the defined standard select Show Compatible To display only patterns that contain a specific prefix enter the Prefix in the edit field To create a new pattern 1 In the VSA Settings Overview dialog box sel...

Страница 192: ...he Modulation Order e g 8 for 8 PSK d Select the next symbol field or insert a new one and continue to define the other symbols To scroll through the fields for long patterns use the scrollbar beneath the input area The number beneath the scrollbar at the right end indi cates the sequential number of the last symbol field the number in the center indicates the sequential number of the currently se...

Страница 193: ... In the VSA Settings Overview dialog box select Signal Description 2 Press Pattern Settings 3 Select the pattern from the list of All Patterns 4 Press Edit Pattern 5 Change the settings as required as described in To create a new pattern on page 191 To delete a predefined pattern 1 In the VSA Settings Overview dialog box select Signal Description 2 Press Pattern Settings 3 Select the pattern from ...

Страница 194: ...tion and use them to compare the mea sured data to In particular you can use known data for the following functions Fine synchronization during the demodulation process see Figure 2 42 and Demodulation on page 169 Calculation of the Bit Error Rate BER see Chapter 3 1 1 23 Bit Error Rate BER on page 95 3 3 7 1 Dependencies and Restrictions when Using Known Data When you use Known Data files as a re...

Страница 195: ...xisting Known Data file 1 In the Settings Overview select Modulation Signal Description 2 Switch to the Known Data tab 3 Activate the usage of a Known Data file by selecting the Known Data option This enables the Load Data File function 4 Select the Load Data File button A file selection dialog box is displayed 5 Select the xml file which contains the possible data sequences of the input signal Th...

Страница 196: ...necessary adapt the demodulation settings until the requested results are obtained 2 Execute the file RecordingToolforSequences EXE from the installation direc tory on the instrument The R S Recording Tool for Sequences window is displayed 3 Start a measurement in the R S FSV K70 application 4 In the tool window select Run The tool records the demodulated data sequences The following result inform...

Страница 197: ...n of the R S FSV K70 applica tion The created xml file can now be loaded in the R S FSV K70 application as described in Chapter 3 3 7 2 How to Load Known Data Files on page 195 3 3 7 4 Reference Known Data File Syntax Description When you load a Known Data file the R S FSV K70 application checks whether the file complies with the following syntax Table 3 7 Known Data File Syntax Syntax Possible Va...

Страница 198: ...05 631 011 235 507 476 330 522 177 177 171 117 777 177 717 717 111 615 527 046 104 004 106 047 125 415 723 344 241 264 773 111 337 446 514 600 677 7 Data Data 77 511 727 242 206 341 366 632 073 607 770 173 705 631 011 235 507 476 330 522 177 177 171 117 777 177 717 717 111 615 527 046 104 004 106 047 125 415 723 344 241 264 773 111 337 446 514 600 677 7 7 Data Data 7 511 727 242 206 341 366 632 07...

Страница 199: ...ts on page 133 To define a limit check 1 Configure a measurement with Modulation Accuracy as the Source in the Dis play Config dialog box 2 Press the LINES key on the front panel 3 Press the Config ModAcc Limits softkey in the Limits menu 4 In the Current tab define limits that the current value should not exceed for any or all of the result types Note the limits for the current value are automati...

Страница 200: ...Configure a measurement with Meas Ref as the Source and an eye diagram as the Result type in the Display Config dialog box 2 Press the LINES key on the front panel 3 Select the Vertical Line Absolute softkey 4 Move the line to the left edge of the eye 5 Select the Vertical Line Rel softkey 6 Move the line to the right edge of the eye The relative position of the line is indicated in the diagram wh...

Страница 201: ...a measurement Traces that are not activated are hidden Each time the trace mode is changed the selected trace memory is cleared The R S FSVA FSV provides the following different trace modes Clear Write Overwrite mode the trace is overwritten by each sweep This is the default setting Remote command DISP TRAC MODE WRIT see DISPlay WINDow n TRACe t MODE on page 259 Max Hold The maximum value is deter...

Страница 202: ...H see DISPlay WINDow n TRACe t MODE on page 259 Average The average is formed over several sweeps The Statistics Count determines the num ber of averaging procedures This mode is not available for statistics measurements Remote command DISP TRAC MODE AVER see DISPlay WINDow n TRACe t MODE on page 259 View The current contents of the trace memory are frozen and displayed Note If a trace is frozen t...

Страница 203: ...010 Date of data set storage Screen A Instrument mode Points per Symbol 4 Points per symbol x Axis Start 13 sym Start value of the x axis x Axis Stop 135 sym Stop value of the x axis Ref value y axis 10 00 dBm Y axis reference value Ref value position 100 Y axis reference position Data section Trace 1 Trace number Meas Result Result type Meas Signal Magnitude Result display Demodulator Offset QPSK...

Страница 204: ... 3 3 CALCulate MARKer subsystem 221 4 3 4 Other CALCulate commands 242 4 4 DISPlay subsystem 257 4 5 FORMat subsystem 267 4 6 INITiate Subsystem 268 4 7 INPut Subsystem 270 4 8 INSTrument Subsystem 277 4 9 MMEMory Subsystem 277 4 10 OUTPut Subsystem 280 4 11 SENSe subsystem 281 4 12 STATus QUEStionable Subsystem 318 4 13 SYSTem Subsystem 325 4 14 TRACe subsystem 325 4 15 TRIGger subsystem 328 4 1 ...

Страница 205: ...alyzer mode OFDM WiMAX IEEE 802 16 OFDM measurements option R S FSV K93 OFDMA WiBro WiMAX IEEE 802 16e OFDMA WiBro measurements option R S FSV K93 NF Noise Figure measurements R S FSV K30 PHN Phase Noise measurements R S FSV K40 PSM Power Sensor measurements option R S FSV K9 SFM Stereo FM measurements optionR S FSV K7S SPECM Spectogram mode option R S FSV K14 TDS TD SCDMA base station UE measurem...

Страница 206: ...compatibility with the SCPI standards Parameters in square brackets can be incorporated optionally in the command or omitted as well Parameters in braces can be incorporated optionally in the command either not at all once or several times Description of Parameters Due to the standardization the parameter section of SCPI commands consists always of the same syntactical elements SCPI has therefore ...

Страница 207: ...requency as result arbitrary block program data This keyword is provided for commands the parameters of which consist of a binary data block 4 2 ABORt Subsystem ABORt This command aborts a current measurement and resets the trigger system Example ABOR INIT IMM Mode all 4 3 CALCulate subsystem 4 3 1 CALCulate DELTamarker subsystem 207 4 3 2 CALCulate LIMit MACCuracy subsystem 213 4 3 3 CALCulate MA...

Страница 208: ...is command turns all active delta markers off Suffix n Selects the measurement window m Selects the marker Example CALC DELT AOFF Switches off all delta markers CALCulate n DELTamarker m LINK State This command links delta marker 1 to marker 1 If you change the horizontal position of the marker so does the delta marker Suffix n Selects the measurement window m 1 irrelevant Parameters State ON OFF ...

Страница 209: ... CALCulate n DELTamarker m MAXimum NEXT This command positions the delta marker to the next smaller trace maximum The cor responding delta marker is activated first if necessary If no next higher minimum value is found on the trace level spacing to adjacent values peak excursion an execution error error code 200 is produced Suffix n Selects the measurement window m Selects the marker Example CALC ...

Страница 210: ...he left of the current value i e descending X values The corresponding delta marker is acti vated first if necessary If no next higher minimum value is found on the trace level spacing to adjacent values peak excursion an execution error error code 200 is produced Suffix n Selects the measurement window m Selects the marker Example CALC DELT MIN LEFT Sets delta marker 1 to the next higher minimum ...

Страница 211: ... vated first if necessary If no next higher minimum value is found on the trace level spacing to adjacent values peak excursion an execution error error code 200 is produced Suffix n Selects the measurement window m Selects the marker Example CALC DELT MIN RIGH Sets delta marker 1 to the next higher minimum value to the right of the current value CALCulate n DELTamarker m STATe State This command ...

Страница 212: ...er on a particular coordinate on the x axis The position is an absolute value Suffix n Selects the measurement window m Selects the marker Parameters Position Depends on the measurement and scale of the horizontal axis Example CALC DELT X Outputs the absolute frequency time of delta marker 1 Manual operation See Marker 1 2 3 4 on page 128 CALCulate n DELTamarker m X ABSolute This command queries t...

Страница 213: ...ion reference fixed active To obtain a correct query result a complete sweep with synchronization to the sweep end must be performed between the activation of the delta marker and the query of the y value This is only possible in single sweep mode Depending on the unit defined with CALC UNIT POW or on the activated measuring functions the query result is output in the units below Suffix n Selects ...

Страница 214: ...CCuracy FERRor RPEak VALue 219 CALCulate n LIMit MACCuracy MERRor PCURrent VALue 219 CALCulate n LIMit MACCuracy MERRor PMEan VALue 219 CALCulate n LIMit MACCuracy MERRor PPEak VALue 219 CALCulate n LIMit MACCuracy MERRor RCURrent VALue 219 CALCulate n LIMit MACCuracy MERRor RMEan VALue 219 CALCulate n LIMit MACCuracy MERRor RPEak VALue 219 CALCulate n LIMit MACCuracy OOFFset CURRent VALue 220 CAL...

Страница 215: ... CFERror EVM FDERror FERRor MERRor OOFFset PERRor RHO CFERror Carrier Frequency Error EVM Error Vector Magnitude FERRor Frequency error FSK only FDERror Frequency deviation error FSK only MERRor Magnitude Error OOFFset I Q Offset PERRor Phase Error RHO Rho LimitType CURRent MEAN PEAK PCURRent PMEan PPEak RCURRent RMEan RPEak For CFERor OOFFset RHO CURRent MEAN PEAK For EVM FERRor MERRor PERRor PCU...

Страница 216: ...ified result type and limit type was violated Suffix n 1 4 window ResultType CFERror EVM FDERror FERRor MERRor OOFFset PERRor RHO CFERror Carrier Frequency Error EVM Error Vector Magnitude FDERror Frequency deviation error FSK only FERRor Frequency error FSK only MERRor Magnitude Error OOFFset I Q Offset PERRor Phase Error RHO Rho LimitType CURRent MEAN PEAK PCURRent PMEan PPEak RCURRent RMEan RPE...

Страница 217: ...M MACC CFER CURR RESULT query result Usage Query only Mode VSA CALCulate n LIMit MACCuracy CFERror CURRent VALue LimitValue CALCulate n LIMit MACCuracy CFERror MEAN VALue LimitValue CALCulate n LIMit MACCuracy CFERror PEAK VALue LimitValue This command defines the limit for the current peak or mean center frequency error limit Note that the limits for the current and the peak value are always kept...

Страница 218: ...ue Range 0 0 to 100 RST 1 5 Default unit Example CALC2 FEED XTIM DDEM MACC switch on result summary in screen 2 CALC2 LIM MACC EVM RPE VAL 2 define a limit of 2 Mode VSA CALCulate n LIMit MACCuracy FDERror CURRent VALue LimitValue CALCulate n LIMit MACCuracy FDERror MEAN VALue LimitValue CALCulate n LIMit MACCuracy FDERror PEAK VALue LimitValue This command defines the lower limit for the current ...

Страница 219: ...alue the value x x 0 defines the interval x x Range 0 0 to 100 RST 1 5 mean 1 0 Default unit Hz Example CALC2 FEED XTIM DDEM MACC switch on result summary in screen 2 CALC2 LIM MACC FERR RPE VAL 15 define a limit of 15 15 Hz Mode VSA CALCulate n LIMit MACCuracy MERRor PCURrent VALue LimitValue CALCulate n LIMit MACCuracy MERRor PMEan VALue LimitValue CALCulate n LIMit MACCuracy MERRor PPEak VALue ...

Страница 220: ...0 Default unit dB Example CALC2 FEED XTIM DDEM MACC switch on result summary in screen 2 CALC2 LIM MACC OOFF PEAK VAL 50dB define a limit of 50 dB Mode VSA CALCulate n LIMit MACCuracy PERRor PCURrent VALue LimitValue CALCulate n LIMit MACCuracy PERRor PMEan VALue LimitValue CALCulate n LIMit MACCuracy PERRor PPEak VALue LimitValue CALCulate n LIMit MACCuracy PERRor RCURrent VALue LimitValue CALCul...

Страница 221: ...n MARKer m AOFF 222 CALCulate n MARKer m FUNCtion DDEMod STATistic ADRoop 222 CALCulate n MARKer m FUNCtion DDEMod STATistic ALL 223 CALCulate n MARKer m FUNCtion DDEMod STATistic CFERror 223 CALCulate n MARKer m FUNCtion DDEMod STATistic EVM 224 CALCulate n MARKer m FUNCtion DDEMod STATistic FDERror 225 CALCulate n MARKer m FUNCtion DDEMod STATistic FSK CFDRift 226 CALCulate n MARKer m FUNCtion D...

Страница 222: ...ALCulate n MARKer m X SLIMits STATe 240 CALCulate n MARKer m X SLIMits LEFT 240 CALCulate n MARKer m X SLIMits RIGHT 241 CALCulate n MARKer m X SLIMits ZOOM 241 CALCulate n MARKer m Y 241 CALCulate n MARKer m AOFF This command all markers off including delta markers and marker measurement func tions Suffix n Selects the measurement window m depends on mode irrelevant Example CALC MARK AOFF Switche...

Страница 223: ...ue of amplitude droop RST PEAK Usage Query only Mode VSA CALCulate n MARKer m FUNCtion DDEMod STATistic ALL This command queries all results of the result summary as shown on the screen Suffix n 1 4 screen number m irrelevant Usage Query only Mode VSA CALCulate n MARKer m FUNCtion DDEMod STATistic CFERror type This command queries the results of the carrier frequency error measurement per formed f...

Страница 224: ... over several sweeps SDEV Standard deviation of frequency error PCTL 95 percentile value of frequency error RST PEAK Usage Query only Mode VSA CALCulate n MARKer m FUNCtion DDEMod STATistic EVM type This command queries the results of the error vector magnitude measurement of digital demodulation The output values are the same as those provided in the Modulation Accuracy table Suffix n 1 4 screen ...

Страница 225: ... sweeps PEAK Maximum EVM over all symbols of current sweep PAVG Average of maximum EVM values over several sweeps TPEA Maximum EVM over all symbols over several sweeps PSD Standard deviation of maximum EVM values over several sweeps PPCT 95 percentile of maximum RMS values over several sweeps RST PEAK Usage Query only Mode VSA CALCulate n MARKer m FUNCtion DDEMod STATistic FDERror type This comman...

Страница 226: ... type This command queries the results of the carrier frequency drift for FSK modulated sig nals Suffix n 1 4 screen number m 1 4 irrelevant Query parameters type none Carrier frequency drift for current sweep AVG Average FSK carrier frequency drift RPE Peak FSK carrier frequency drift SDEV Standard deviation of FSK carrier frequency drift PCTL 95 percentile value of FSK carrier frequency drift RS...

Страница 227: ...mum frequency error over all symbols of current sweep PAVG Average of maximum frequency error values over several sweeps TPE Maximum frequency error over all symbols over several sweeps PSD Standard deviation of maximum frequency error values over several sweeps PPCT 95 percentile of maximum RMS values over several sweeps RST PEAK Usage Query only Mode VSA CALCulate n MARKer m FUNCtion DDEMod STAT...

Страница 228: ... RST PEAK Usage Query only Mode VSA CALCulate n MARKer m FUNCtion DDEMod STATistic FSK RDEViation type This command queries the results of the reference deviation of FSK modulated signals Suffix n 1 4 screen number m 1 4 irrelevant Query parameters type none Measurement deviation for current sweep AVG Average FSK measurement deviation RPE Peak FSK measurement deviation SDEV Standard deviation of F...

Страница 229: ...number m 1 4 irrelevant Query parameters type none Gain imbalance error for current sweep AVG Average gain imbalance error over several sweeps RPE Peak gain imbalance error over several sweeps SDEV Standard deviation of gain imbalance error PCTL 95 percentile value of gain imbalance error RST PEAK Usage Query only Mode VSA CALCulate n MARKer m FUNCtion DDEMod STATistic IQIMbalance type This comman...

Страница 230: ...Ction DDEMod STATistic MERRor type This command queries the results of the magnitude error measurement of digital demodulation Suffix n 1 4 screen number m 1 4 irrelevant Query parameters type none magnitude error for current sweep AVG Average magnitude error over several sweeps RPE Peak magnitude error over several sweeps SDEV Standard deviation of magnitude error PCTL 95 percentile value of magn...

Страница 231: ... of power measurement RST PEAK Usage Query only Mode VSA CALCulate n MARKer m FUNCtion DDEMod STATistic OOFFset type This command queries the results of the I Q offset measurement performed for digital demodulation Suffix n 1 4 screen number m 1 4 irrelevant Query parameters type none Origin offset error for current sweep AVG Average origin offset error over several sweeps RPE Peak origin offset e...

Страница 232: ...veral sweeps SDEV Standard deviation of phase error values over several sweeps PCTL 95 percentile of RMS value over several sweeps PEAK Maximum phase error of current sweep PAVG Average of maximum phase error values over several sweeps TPE Maximum phase error over several sweeps PSD Standard deviation of maximum phase error values over several sweeps PPCT 95 percentile of maximum RMS values over s...

Страница 233: ... 95 percentile value of quadrature error RST PEAK Usage Query only Mode VSA CALCulate n MARKer m FUNCtion DDEMod STATistic RHO type This command queries the results of the Rho factor measurement performed for digital demodulation Suffix n 1 4 screen number m 1 4 irrelevant Query parameters type none Rho factor for current sweep AVG Average rho factor over several sweeps RPE Peak rho factor over se...

Страница 234: ...95 percentile of RMS value over several sweeps PEAK Maximum SNR over all symbols of current sweep PAVG Average of maximum SNR values over several sweeps TPE Maximum SNR over all symbols over several sweeps PSD Standard deviation of maximum SNR values over several sweeps PPCT 95 percentile of maximum RMS values over several sweeps RST PEAK Usage Query only Mode VSA CALCulate n MARKer m LINK MarkerC...

Страница 235: ...t smaller trace maximum on the left of the current position i e in descending X values If no next smaller maximum value is found on the trace level spacing to adjacent val ues peak excursion an execution error error code 200 is produced Suffix n Selects the measurement window m Selects the marker Example CALC MARK2 MAX LEFT Positions marker 2 to the next lower maximum value to the left of the curr...

Страница 236: ...fix n Selects the measurement window m Selects the marker Example CALC MARK2 MAX RIGH Positions marker 2 to the next lower maximum value to the right of the current value Usage Event Manual operation See Search Direction on page 131 CALCulate n MARKer m MAXimum PEAK This command positions the marker on the current trace maximum The corresponding marker is activated first or switched to the marker ...

Страница 237: ...s command positions ae marker to the next higher trace minimum If no next higher minimum value is found on the trace level spacing to adjacent values peak excursion an execution error error code 200 is produced Suffix n Selects the measurement window m Selects the marker Example CALC MARK2 MIN Positions marker 2 to the minimum value of the trace CALC MARK2 MIN NEXT Positions marker 2 to the next h...

Страница 238: ...s the measurement window m Selects the marker Example CALC MARK2 MIN Positions marker 2 to the minimum value of the trace CALC MARK2 MIN RIGH Positions marker 2 to the next higher minimum value to the right of the current value Usage Event CALCulate n MARKer m SEARch MarkRealImag This command specifies whether the marker search works on the real or the imag trace Suffix n 1 4 m 1 4 irrelevant Sett...

Страница 239: ...elects the trace a marker is positioned on The corresponding trace must have a trace mode other than Blank If necessary the corresponding marker is switched on prior to the assignment Suffix n Selects the measurement window m depends on mode Selects the marker Parameters Trace 1 6 Trace number the marker is positioned on Example CALC MARK3 TRAC 2 Assigns marker 3 to trace 2 Manual operation See Ma...

Страница 240: ...mmand limits the evaluation range on the trace Suffix n Selects the measurement window m marker Parameters State ON OFF RST OFF Example CALC MARK X SLIM ON Switches on search limitation CALCulate n MARKer m X SLIMits LEFT Limit This command sets the left limit of the marker search range If the power measurement in zero span is active this command limits the evaluation range to the trace Note The f...

Страница 241: ...RK X SLIM ON Switches the search limit function on CALC MARK X SLIM RIGH 20MHz Sets the right limit of the search range to 20 MHz Manual operation See Search Limits on page 131 CALCulate n MARKer m X SLIMits ZOOM State This command sets the limits of the marker search range to the zoom area Note The function is only available if the search limit for marker and delta marker is switched on see CALCu...

Страница 242: ...sage Query only Manual operation See Marker 1 2 3 4 on page 128 See Select 1 2 3 4 on page 130 4 3 4 Other CALCulate commands CALCulate n BERate 243 CALCulate n DDEM SPECtrum STATe 243 CALCulate n DLABs STATe 244 CALCulate n DLABs VALue 244 CALCulate n DLRel STATe 245 CALCulate n DLRel VALue 245 CALCulate n ELIN startstop STATe 246 CALCulate n ELIN startstop VALue 246 CALCulate n FEED 247 CALCulat...

Страница 243: ...alues Format Specifies a particular BER result to be queried if no parameter is specified the current bit error rate is returned The parameters for these results are listed in Table 4 1 Mode VSA Table 4 1 Parameters for BER result values Result Current Min Max Acc Bit Error Rate CURRent MIN MAX TOTal Total of Errors TECurrent TEMIN TEMAX TETotal Total of Bits TCURrent TMIN TMAX TTOTal CALCulate n ...

Страница 244: ...te ON OFF RST OFF Example Display eye diagram in window 2 LAY ADD 1 BEL MEAS CALC2 FORM QEYE Display absolute horizontal line CALC2 DLAB STAT ON Query y value of absolute horizontal line CALC2 DLAB VAL Manual operation See Horizontal Line on page 133 CALCulate n DLABs VALue HorAbsPos Defines value of horizontal absolute line Setting parameters HorAbsPos numeric value Y value of the absolute horizo...

Страница 245: ...page 133 CALCulate n DLRel VALue LineRelPosRel Defines or queries the y value of the relative horizontal line in the specified window This command is only available for eye diagrams and only if an absolute horizontal line and a relative horizontal line are already available in the same diagram see CALCulate n DLABs STATe on page 244 and CALCulate n DLRel STATe on page 245 Setting parameters LineRe...

Страница 246: ... from the start value defined by CALC ELIN1 VAL to the stop value defined by CALC ELIN2 VAL see CALCulate n ELIN startstop VALue on page 246 OFF The complete result area is evaluated RST OFF Mode VSA Manual operation See Entire Result Range on page 168 CALCulate n ELIN startstop VALue LeftDisp Defines the start and stop values for the evaluation range see CALCulate n ELIN startstop STATe on page 2...

Страница 247: ...ymbol table TCAP Capture Buffer Example Switch to EVM CALC FEED XTIM DDEM ERR VECT CALC FORM MAGN Switch to Meas Signal Frequency Relative CALC FEED XTIM DDEM MEAS CALC FORM FREQ DISP WIND1 TRAC1 Y SCAL MODE REL Mode VSA Manual operation See Evaluation on page 123 See Source on page 177 CALCulate n FORMat Format This command defines the result type of the traces Which parameters are available depe...

Страница 248: ...ellation I Q CONS Constellation I Q Rotated RCON Vector I Q COMP Constellation Frequency CONF Vector Frequency COVF Symbols Binary BIN Octal OCT Decimal DEC Hexadecimal HEX Error Vector EVM MAGNitude Real Imag I Q RIMag Vector I Q COMP Modulation Errors Magnitude Error MAGNitude Phase Error PHASe Frequency Error Absolute FREQuency Frequency Error Relative FREQuency Modulation Accuracy Bit Error Ra...

Страница 249: ...ensation This command selects the method for calculating the frequency error for FSK modula tion Suffix n 1 4 Setting parameters RefDevCompensation ON OFF RST ON Mode VSA CALCulate n FSK DEViation REFerence RELative FSKRefDev This command sets the relative reference value of the frequency deviation for FSK modulation The reference is in relation to the symbol rate Suffix n 1 4 Setting parameters F...

Страница 250: ...istribution of magnitude phase or frequency values on or off Suffix n 1 4 Setting parameters AddEvaluation ON OFF RST OFF Example CALC STAT CCDF ON Switches the statistic measurements on Mode VSA Manual operation See Result Type Transformation on page 178 CALCulate n STATistics MODE StatisticMode This command defines whether only the symbol points or all points are considered for the statistical c...

Страница 251: ...stics measurement depending on the measured values Suffix n 1 4 Setting parameters AutoMode ONCE Example CALC3 STAT SCAL AUTO ONCE Usage Setting only Mode VSA Manual operation See Adjust Settings on page 113 CALCulate n STATistics SCALe X BCOunt StatisticsNofColumns This command defines the number of columns for the statistical distribution Suffix n 1 4 Setting parameters StatisticsNofColumns nume...

Страница 252: ...the scaling type of the y axis Suffix n selects the screen Parameters Unit PCT ABS RST ABS Example CALC STAT SCAL Y UNIT PCT Sets the percentage scale Manual operation See y Unit Abs on page 113 CALCulate n STATistics SCALe Y UPPer Value This command defines the upper limit for the y axis of the diagram in statistical mea surements Since probabilities are specified on the y axis the entered numeri...

Страница 253: ...l line is already available in the diagram see CALCulate n TLABs STATe on page 252 Setting parameters VertAbsPos numeric value X value of the absolute vertical line Range 1e9 to 1e9 RST 0 Default unit SYM Example Display eye diagram in window 2 LAY ADD 1 BEL MEAS CALC2 FORM QEYE Display absolute vertical line CALC2 TLAB STAT ON Query y value of absolute vertical line CALC2 TLAB VAL Manual operatio...

Страница 254: ...ate n TLABs STATe on page 252 and CALCulate n TLRel STATe on page 253 Setting parameters LineRelPosRel numeric value Relative distance of the second vertical line to the first absolute vertical line Range 1e9 to 1e9 RST 0 Default unit SYM Example Display eye diagram in window 2 LAY ADD 1 BEL MEAS CALC2 FORM QEYE Display absolute vertical line CALC2 TLAB STAT ON Display relative vertical line CALC2...

Страница 255: ...s to appear in the result range Suffix n 1 4 irrelevant t 1 6 irrelevant Setting parameters Alignment LEFT CENTer RIGHt LEFT The reference point is displayed at the left edge of the result range CENTer The reference point is displayed in the middle of the result range RIGHt The reference point is displayed at the right edge of the result range RST LEFT Example CALC TRAC ADJ ALIG LEFT The reference...

Страница 256: ...ion See Reference on page 166 CALCulate n TRACe t VALue TrRefType This commands selects the meas or the ref signal for a trace Suffix n 1 4 t 1 6 Setting parameters TrRefType MEAS REF RST The default for trace 1 is always the measurement signal MEAS For all other traces the default sig nal type depends on the current measurement Example CALC2 TRAC5 MEAS Sets the measurement signal for trace 5 Usag...

Страница 257: ...ay WINDow n TRACe t STATe 260 DISPlay WINDow n TRACe t SYMBol 260 DISPlay WINDow n TRACe t X SCALe PDIVision 260 DISPlay WINDow n TRACe t X SCALe RPOSition 261 DISPlay WINDow n TRACe t X SCALe RVALue 261 DISPlay WINDow n TRACe t X SCALe STARt 262 DISPlay WINDow n TRACe t X SCALe VOFFset 262 DISPlay WINDow n TRACe t Y SCALe 262 DISPlay WINDow n TRACe t Y SCALe AUTO VALue 263 DISPlay WINDow n TRACe ...

Страница 258: ... Example DISP WIND2 PRAT AUTO Queries the points per symbol mode Mode VSA Manual operation See Display Points Sym on page 179 DISPlay WINDow n PRATe VALue DisplayPPS This command determines the number of points to be displayed per symbol if manual mode is selected see DISPlay WINDow n PRATe AUTO on page 258 Suffix n 1 4 Setting parameters DisplayPPS 1 2 4 8 16 or 32 RST 4 Example DDEM PRAT 8 Sets ...

Страница 259: ...er of measurements for AVERage MAXHold and MINHold is defined with the SENSe SWEep COUNt VALue on page 317 command Note that synchroni zation to the end of the indicated number of measurements is only possible in single sweep mode Suffix n window For applications that do not have more than 1 measure ment window the suffix n is irrelevant t trace Parameters Mode WRITe VIEW AVERage MAXHold MINHold B...

Страница 260: ...e Parameters State ON OFF RST ON for TRACe1 OFF for TRACe2 to 6 Example DISP TRAC3 ON Manual operation See Trace 1 Trace 2 Trace 3 Trace 4 Trace 5 Trace 6 on page 120 See Blank on page 122 DISPlay WINDow n TRACe t SYMBol This command defines the display of the decision instants time when the signals occurred on the trace Suffix n 1 4 t 1 6 Example DISP WIND1 TRAC SYMB ON Defines that the decision ...

Страница 261: ...al result displays All other result displays support the query only Suffix n 1 4 t 1 6 Setting parameters RPos numeric value numeric_value Example DISP TRAC X RPOS 30 PCT The reference value is shifted by 30 towards the left Mode VSA DISPlay WINDow n TRACe t X SCALe RVALue RVal This command defines the reference value for the X axis of the measurement diagram Setting the reference value of the x a...

Страница 262: ...t as the reference for the screen display CALC TRAC ADJ ALIG CENT Position the burst at the center of the screen DISP TRAC X STAR Queries the start value of the X axis Usage Query only Mode VSA DISPlay WINDow n TRACe t X SCALe VOFFset VOffset This command adds an offset to the symbols shown in the result display The offset is available for all result displays except the capture buffer Suffix n 1 4...

Страница 263: ... on page 111 DISPlay WINDow n TRACe t Y SCALe AUTO VALue This command automatically scales the vertical axis of the specified screen Suffix n 1 4 t 1 6 Example DISP WIND2 TRAC Y SCAL AUTO Auto scaling for screen B Usage Event Mode VSA Manual operation See Y Axis Autorange on page 112 DISPlay WINDow n TRACe t Y SCALe AUTO ALL This command automatically scales the vertical axis of all screens Suffix...

Страница 264: ...e y axis RST ABS Example DISP TRAC Y MODE REL DISPlay WINDow n TRACe t Y SCALe PDIVision Range This remote command determines the grid spacing on the Y axis for all diagrams where possible Suffix n 1 4 t 1 6 irrelevant Setting parameters Range numeric value Range 1 to 1000000 RST 100 Default unit NONE Example DISP TRAC1 Y PDIV 2 dB Mode VSA DISPlay WINDow n TRACe t Y SCALe RLEVel ReferenceLevel Th...

Страница 265: ...fset on page 151 DISPlay WINDow n TRACe t Y SCALe RPOSition Position This command defines the position of the reference level on the display grid When using a tracking generator only with option R S FSV B9 or B10 requires active normalization and in Bluetooth mode option R S FSV K8 this command defines the position of the reference value for all windows Suffix n Selects the measurement window t ir...

Страница 266: ...of 20 dBm Manual operation See Y Axis Reference Value on page 112 DISPlay WINDow n TRACe t Y SPACing ScalingType This command selects the scaling of the y axis Suffix n Selects the measurement window t irrelevant Parameters ScalingType LOGarithmic Logarithmic scaling LINear Linear scaling in LDB Linear scaling in dB RST LOGarithmic Example DISP TRAC Y SPAC LIN Select a linear scale Manual operatio...

Страница 267: ...orner is the end point of the system Range 0 to 100 Default unit PCT Example DISP ZOOM ON Activates the zoom mode DISP ZOOM AREA 5 30 20 100 Enlarges the display of the measurement results in the area defined by the coordinates 5 30 and 20 100 4 5 FORMat subsystem FORMat DEXPort DSEParator 267 FORMat DEXPort HEADer 268 FORMat DEXPort MODE 268 FORMat DEXPort DSEParator Separator This command define...

Страница 268: ...ample FORM DEXP HEAD OFF Only a short file header is transferred Mode VSA Manual operation See ASCII Trace Export on page 123 FORMat DEXPort MODE Mode This command defines whether raw I Q data or trace data is transferred Setting parameters Mode RAW TRACe RST TRACe Example FORM DEXP MODE RAW Raw measurement data is transferred Mode VSA Manual operation See ASCII Trace Export on page 123 4 6 INITia...

Страница 269: ...FF Switches to single sweep mode DISP WIND TRAC MODE AVER Switches on trace averaging SWE COUN 20 Setting the sweep counter to 20 sweeps INIT WAI Starts the measurement and waits for the end of the 20 sweeps INIT CONM WAI Continues the measurement next 20 sequences and waits for the end Manual operation See Continue Single Sweep on page 118 INITiate n CONTinuous State This command determines wheth...

Страница 270: ...ep end synchronization Suffix n irrelevant Example INIT CONT OFF Switches to single sweep mode DISP WIND TRAC MODE AVER Switches on trace averaging SWE COUN 20 Setting the sweep counter to 20 sweeps INIT WAI Starts the measurement and waits for the end of the 20 sweeps Mode all INITiate REFMeas Repeats the evaluation of the data currently in the capture buffer without capturing new data This is us...

Страница 271: ...coupling to the reference level is switched off This function is not available if the R S Digital I Q Interface R S FSV B17 is active Parameters Value RST 10 dB AUTO is set to ON Example INP ATT 30dB Sets the attenuation on the attenuator to 30 dB and switches off the coupling to the reference level Mode all Manual operation See RF Atten Manual Mech Att Manual on page 114 See RF Attenuation on pag...

Страница 272: ...R S Digital I Q Inter face R S FSV B17 in the description of the base unit Return values ConnState Defines whether a device is connected or not 0 No device is connected 1 A device is connected DeviceName Device ID of the connected device SerialNumber Serial number of the connected device PortName Port name used by the connected device SampleRate Maximum or currently used sampling rate of the conne...

Страница 273: ...ling State If enabled the reference level for digital input is adjusted to the full scale level automat ically if the fullscale level changes This command is only available if the optional R S Digital I Q Interface option R S FSV B17 is installed For details see the R S Digital I Q Interface R S FSV B17 description of the base unit Parameters State ON OFF RST OFF Example INP DIQ RANG COUP OFF Mode...

Страница 274: ...plication you are using This command is only available if the optional R S Digital I Q Interface option R S FSV B17 is installed For details see the R S Digital I Q Interface R S FSV B17 description of the base unit Parameters Level V dBm dBpW W dBmV dBuV dBuA A RST Volt Example INP DIQ RANG UNIT A Mode IQ VSA EVDO CDMA WCDMA GSM ADEMOD TDS Manual operation See Level Unit on page 137 INPut DIQ SRA...

Страница 275: ...ation the reference level is adjusted accordingly and the warning Limit reached is output Parameters Attenuation 0 25 RST 0 dB OFF Example INP1 EATT 10 dB Mode all Manual operation See El Atten Mode Auto Man on page 115 See El Attenuation ON OFF on page 152 INPut EATT AUTO State This command switches the automatic behaviour of the electronic attenuator on or off If activated electronic attenuation...

Страница 276: ... longer ensured Note that the YIG preselector is active only on frequencies greater than 7 GHz There fore switching the YIG preselector on and off has no effect if the frequency is below that value Parameters State ON OFF 0 1 RST 1 0 for I Q Analyzer GSM VSA measurements Example INP FILT YIG OFF Deactivates the YIG preselector Manual operation See Bypassing the YIG Filter on page 116 INPut GAIN ST...

Страница 277: ... IQ NF TDS VSA CDMA EVDO WCDMA ADEMOD GSM OFDM OFDMA WiBro WLAN Manual operation See Input Path on page 136 4 8 INSTrument Subsystem INSTrument SELect Mode This command switches the instrument to VSA mode Parameters Mode DDEM VSA mode Example INST SEL DDEM Mode VSA INSTrument NSELect Mode This command switches the instrument to VSA mode Parameters Mode 2 VSA mode Example INST NSEL 2 Mode VSA 4 9 M...

Страница 278: ...Mode ON OFF Mode VSA MMEMory STORe IQ STATe 1 FileName This command stores the complex I Q data to the specified iq tar file in 32 bit float ing point format Parameters FileName Complete file name including the path Example MMEM STOR IQ STAT 1 C R_S Instr user data iq tar Stores I Q data to the specified file Manual operation See IQ Export on page 140 MMEMory STORe IQ COMM Description Defines a de...

Страница 279: ...the specified window in a file with ASCII for mat The file format is described in Chapter 3 4 2 ASCII File Export Format for VSA Data on page 203 The decimal separator decimal point or comma for floating point numerals contained in the file is defined with the FORMat DEXPort DSEParator command see FORMat DEXPort DSEParator on page 267 Suffix n window For applications that do not have more than 1 m...

Страница 280: ...tus of the digital baseband output to the optional R S Digital I Q Interface option R S FSV B17 For details see the R S Digital I Q Interface description for the base unit Return values ConnState Defines whether a device is connected or not 0 No device is connected 1 A device is connected DeviceName Device ID of the connected device SerialNumber Serial number of the connected device PortName Port ...

Страница 281: ...CONFigure LEVel DURation MODE 284 SENSe ADJust LEVel 284 SENSe DDEMod ECALc OFFSet 285 SENSe DDEMod ECALc MODE 285 SENSe DDEMod EPRate AUTO 285 SENSe DDEMod EPRate VALue 286 SENSe DDEMod FACTory VALue 286 SENSe DDEMod FILTer ALPHa 286 SENSe DDEMod FILTer STATe 287 SENSe DDEMod FORMat 287 SENSe DDEMod FSK NSTate 287 SENSe DDEMod FSYNc AUTO 288 SENSe DDEMod FSYNc LEVel 288 SENSe DDEMod FSYNc RESult ...

Страница 282: ...Se DDEMod SEARch BURSt LENGth MINimum 302 SENSe DDEMod SEARch BURSt MODE 302 SENSe DDEMod SEARch BURSt SKIP FALLing 303 SENSe DDEMod SEARch BURSt SKIP RISing 303 SENSe DDEMod SEARch BURSt STATe 303 SENSe DDEMod SEARch BURSt TOLerance 304 SENSe DDEMod SEARch MBURst CALC 304 SENSe DDEMod SEARch MBURst STARt 304 SENSe DDEMod SEARch PATTern CONFigure AUTO 305 SENSe DDEMod SEARch PATTern SYNC STATe 305...

Страница 283: ... SENSe SWEep COUNt VALue 317 SENSe SWEep COUNt CURRent 318 SENSe ADJust CONFiguration HYSTeresis LOWer Threshold This command defines a lower threshold the signal must drop below before the refer ence level is automatically adjusted when the Auto Level function is performed See SENSe ADJust LEVel on page 284 Parameters Threshold Range 0 to 200 RST 1 dB Default unit dB Example SENS ADJ CONF HYST LO...

Страница 284: ...7 SENSe ADJust CONFigure LEVel DURation MODE Mode This command selects the way the R S FSVA FSV determines the length of the mea surement that is performed while determining the ideal reference level Parameters Mode AUTO Automatically determines the measurement length MANual Manual definition of the measurement length RST AUTO Example ADJ CONF LEV DUR MODE MAN Specifies manual definition of the me...

Страница 285: ...culation normalized to the mean power of the reference sig nal at the symbol instants SYMBol Calculation normalized to the maximum power of the reference signal at the symbol instants MECPower Calculation normalized to the mean expected power of the mea surement signal at the symbol instants MACPower Calculation normalized to the maximum expected power of the measurement signal at the symbol insta...

Страница 286: ...ctory This command restores the factory settings of standards or patterns for the R S FSV K70 option Setting parameters Factory ALL STANdard PATTern ALL Restores both standards and patterns RST ALL Usage Setting only Mode VSA Manual operation See Restore Standard Files on page 109 See Restore Pattern Files on page 109 SENSe DDEMod FILTer ALPHa MeasFilterAlphaBT This command determines the filter c...

Страница 287: ...not filtered SENSe DDEMod MFILter AUTO is deactivated RST ON Example DDEM FILT OFF The input signal is not filtered Mode VSA SENSe DDEMod FORMat Group This command selects the digital demodulation mode Setting parameters Group MSK PSK QAM QPSK FSK UQAM QPSK Quad Phase Shift Key PSK Phase Shift Key MSK Minimum Shift Key QAM Quadrature Amplitude Modulation RST PSK Example SENS DDEM FORM QAM Selects ...

Страница 288: ...ON Mode VSA Manual operation See Fine Synchronization on page 173 SENSe DDEMod FSYNc LEVel SERLevel This command is only available if SENSe DDEMod FSYNc MODE KDAT was per formed It defines a maximum symbol error rate for the known data in reference to the analyzed data If the SER of the measured data exceeds this limit the default synchronization using the detected data is performed A maximum SER ...

Страница 289: ...ults e g the bit error rate Note You can define a maximum symbol error rate SER for the known data in refer ence to the analyzed data If the SER of the known data exceeds this limit the default synchronization using the detected data is performed See SENSe DDEMod FSYNc LEVel on page 288 Setting parameters FineSync KDATa PATTern DDATa KDATa The reference signal is defined as the data sequence from ...

Страница 290: ... string the path and file name of the xml file containing known data sequences Example SENS DDEM KDAT NAME D MyData xml Mode VSA Manual operation See Load Data File on page 149 SENSe DDEMod MAPPing CATalog This command queries the names of all mappings that are available for the current modulation type and order A mapping describes the assignment of constellation points to symbols Example DDEM MAP...

Страница 291: ...er AUTO MeasFilterAuto If this command is set to ON the measurement filter is defined automatically depend ing on the Transmit filter Setting parameters MeasFilterAuto ON OFF RST ON Example SENS DDEM MFIL AUTO ON Mode VSA Manual operation See Auto on page 175 SENSe DDEMod MFILter NAME Name This command selects a measurement filter and automatically switches it on For more information on measuremen...

Страница 292: ...ary as the SENSe DDEMod MFILter NAME com mand automatically switches the selected filter on RST ON Example SENS DDEM MFIL STAT OFF Deactivates the measurement filter Mode VSA Manual operation See Type on page 175 SENSe DDEMod MFILter USER FilterName This command selects the user defined measurement filter For details on creating user defined filters see Chapter 2 2 7 Customized Filters on page 19 ...

Страница 293: ...hes the compensation of the amplitude droop on or off Setting parameters CompAmptDroop ON OFF RST ON Example DDEM NORM ADR ON Switches the compensation on Mode VSA Manual operation See Compensate for on page 170 SENSe DDEMod NORMalize CFDRift CarrierFreqDrift This command activates or deactivates compensation of the carrier frequency drift Setting parameters CarrierFreqDrift ON OFF RST OFF Mode VS...

Страница 294: ...off Mode VSA Manual operation See Compensate for on page 170 SENSe DDEMod NORMalize IQOFfset CompIQOffset This command switches the compensation of the IQ offset on or off Setting parameters CompIQOffset ON OFF RST ON Example DDEM NORM IQOF OFF Switches the compensation off Mode VSA Manual operation See Compensate for on page 170 SENSe DDEMod NORMalize VALue Normalize This command switches the com...

Страница 295: ...ee Capture Oversampling on page 154 SENSe DDEMod PRESet CALC This command selects the Signal Overview from the predefined tab of the display over view dialog box Example SENS DDEM PRES CALC Resets the screen display to the presetting Usage Event Mode VSA SENSe DDEMod PRESet RLEVel This command initiates automatic setting of the RF attenuation and IF gain to the level of the applied signal Note The...

Страница 296: ...dards predefined by Rohde Schwarz do not require a path definition A list of short forms for predefined standards is provided below Example DDEM PRES TETRA_NDDOWN Switches the predefined digital standard TETRA_Disconti nuousDownlink on DDEM PRES C R_S Instr usr standards USER_GSM Switches the user defined digital standard USER_GSM on Mode VSA Manual operation See Load Standard on page 108 For pred...

Страница 297: ...GBEE_BPSK_915M_600K ZIGBEE_OQPSK_2450M_1M SENSe DDEMod PSK FORMat Name Together with DDEMod PSK NST this command defines the demodulation order for PSK see also SENSe DDEMod PSK NSTate on page 298 Depending on the demodulation format and state the following orders are available NSTATe Format Order 2 any BPSK Pi 2 BPSK 8 NORMal 8PSK 8 DIFFerential D8PSK 8 N3Pi8 3pi 8 8PSK EDGE 8 PI8D8PSK Pi 8 D8PSK...

Страница 298: ...ial D8PSK 8 N3Pi8 3pi 8 8PSK EDGE 8 PI8D8PSK Pi 8 D8PSK Setting parameters PSKNstate numeric value RST 2 Example DDEM FORM PSK Switches PSK demodulation on DDEMod PSK NST 8 DDEM PSK FORM DIFF Switches D8PSK demodulation on Mode VSA SENSe DDEMod QAM FORMat Name This command defines the specific demodulation mode for QAM The current firmware release of the R S FSV K70 does not support Differential Q...

Страница 299: ...Example DDEM FORM QAM Switches QAM demodulation on DDEM QAM NST 64 Switches 64QAM demodulation on Mode VSA SENSe DDEMod QPSK FORMat Name This command defines the demodulation order for QPSK FORMat Order NORMal QPSK DIFFerential DQPSK OFFSet OQPSK DPI4 PI 4 DQPSK Setting parameters Name NORMal DIFFerential DPI4 OFFSet RST NORMal Example DDEM FORM QPSK Switches QPSK demodulation on DDEM QPSK FORM DP...

Страница 300: ...his command defines the capture length for further processing e g for burst search The RLENgth is given in time S or symbols SYM As a result of a query the value is given in time Note that the maximum record length depends on the capture oversampling rate see Capture Oversampling on page 154 For the default value 4 the maximum is 50 000 For larger oversample rates the maximum record length can be ...

Страница 301: ...9 Setting parameters AutoBurstSearch AUTO MANual RST AUTO Example DDEM SEAR BURS AUTO AUTO Enables auto burst search Mode VSA Manual operation See Auto On Off on page 159 SENSe DDEMod SEARch BURSt CONFigure AUTO AutoConfigure This command sets the search tolerance and the min gap length to their default values Setting parameters AutoConfigure ON OFF RST ON Example SENS DDEM SEAR BURS CONF AUTO ON ...

Страница 302: ... BURS LENG MAX 156 us The maximum burst length is 156 µs Mode VSA SENSe DDEMod SEARch BURSt LENGth MINimum UsefulLength This command defines the minimum length of a burst Only those bursts will be recog nized that exceed this length The default unit is symbols The value can also be given in seconds Setting parameters UsefulLength numeric value Range 10 to 15000 RST 98 Default unit SYM Example DDEM...

Страница 303: ...rameters RunOut numeric value Range 0 to 15000 RST 1 Default unit SYM Example DDEM SEAR BURS SKIP FALL 5US 5 µs of the rising burst edge are not considered Mode VSA SENSe DDEMod SEARch BURSt SKIP RISing RunIn This command defines the length of the rising burst edge which is not considered when evaluating the result The default unit is symbols The value can also be given in sec onds Setting paramet...

Страница 304: ...RS TOL 1 Sets the burst tolerance to 1 Mode VSA Manual operation See Search Tolerance on page 159 SENSe DDEMod SEARch MBURst CALC SelectResRangeNr Sets the result range to be displayed after a single sweep Setting parameters SelectResRangeNr numeric value Range 1 to 1000000 RST 1 Default unit NONE Mode VSA Manual operation See Select Result Rng on page 119 SENSe DDEMod SEARch MBURst STARt This com...

Страница 305: ...e AUTO AutoConfigure This command sets the IQ correlation threshold to its default value Setting parameters AutoConfigure ON OFF RST ON Example SENS DDEM SEAR PATT CONF AUTO ON Mode VSA Manual operation See Auto Configuration on page 161 SENSe DDEMod SEARch PATTern SYNC STATe FastSync Switches fast synchronization on and off if you manually synchronize with a waveform pattern Setting parameters Fa...

Страница 306: ...e DDEMod SEARch SYNC CATalog Patterns This command reads the names of all patterns stored on the hard disk Setting parameters Patterns CURRent ALL CURRent Only patterns that belong to the current standard ALL All patterns RST ALL Example DDEM PRES GSM_AB Selects the digital standard GSM Access Burst DDEM SEAR SYNC PATT ADD GSM_TSC1 Adds GSM_TSC1 to standard DDEM SEAR SYNC CAT CURR Reads out all pa...

Страница 307: ...editor by storing it under a new name Setting parameters Pattern string Example DDEM SEAR SYNC NAME GSM_TSC0 Selects the pattern DDEM SEAR SYNC COPY GSM_PATT Copies GSM_TSC0 to GSM_PATT Usage Setting only Mode VSA SENSe DDEMod SEARch SYNC DATA Data This command defines the sync sequence of a sync pattern The pattern must have been selected before using the DDEM SEARch SYNC NAME command see SENSe D...

Страница 308: ...been selected before using the DDEM SEARch SYNC NAME command see SENSe DDEMod SEARch SYNC NAME on page 309 Example DDEM SEAR SYNC NAME GSM_TSC0 Selects the pattern DDEM SEAR SYNC DEL Deletes GSM_TSC0 pattern Usage Event Mode VSA Manual operation See Delete on page 163 SENSe DDEMod SEARch SYNC FOUNd Name This command returns the name of the pattern that was found Setting parameters Name string Exam...

Страница 309: ...h BURSt STATe on page 303 With MEAS selected the measurement is performed independently of successful synchronization Setting parameters MeasOnlyOnPattern MEAS SYNC RST MEAS Example DDEM SEAR SYNC MODE SYNC The measurement is performed only with successful synchroni zation Mode VSA Manual operation See Auto On Off on page 161 See Meas only if pattern symbols correct on page 161 SENSe DDEMod SEARch...

Страница 310: ...ndard see SENSe DDEMod SEARch SYNC SELect on page 310 Setting parameters AddPattern string Example DDEM PRES TETRA_NCDOWN Selects the standard TETRA_NCDOWN DDEM SEAR SYNC PATT ADD TETRA_S1 Adds the pattern TETRA_S1 to the standard Usage Setting only Mode VSA Manual operation See Add to Standard on page 163 SENSe DDEMod SEARch SYNC PATTern REMove This command deletes one or all patterns from the cu...

Страница 311: ...ommand defines a text to explain the pattern The text is displayed only in the selection menu manual control This text should be short and concise Detailed infor mation about the pattern is given in the comment see SENSe DDEMod SEARch SYNC COMMent on page 306 Setting parameters Text string Example SENS DDEM SEAR SYNC NAME GSM_1 Selects the GSM_1 pattern DDEM SEAR SYNC DATA 1001 Enter pattern 1001 ...

Страница 312: ... See Symbol Rate on page 145 SENSe DDEMod STANdard COMMent Comment This command enters the comment for a new standard The comment is stored with the standard and is only displayed in the selection menu manual operation When remote control is used the string is deleted after the standard has been stored allow ing a new comment to be entered for the next standard In this case a blank string is retur...

Страница 313: ...e digital standard is already in use an error message is output and a new name has to be selected It is recommended that you define a comment before storing the standard Setting parameters FileName string The path and file name to which the settings are stored Example DDEM STAN COMM GSM_AccessBurst with Pattern Defines a comment for the settings DDEM STAN SAVE C R_S Instr usr standards USER_GSM St...

Страница 314: ...meric value Range 0 05 to 1 0 RST 0 22 Default unit NONE Mode VSA SENSe DDEMod TFILter NAME Name This command selects a transmit filter and automatically switches it on For more information on Transmit filters refer to Chapter 2 2 4 Modulation and Demodulation Filters on page 14 Parameters Name Name of the Transmit filter an overview of available Transmit fil ters is provided in Table 2 3 Example ...

Страница 315: ...This command selects a user defined Transmit filter file Setting parameters FilterName The name of the Transmit filter file Example SENS DDEM TFIL NAME USER Defines the use of a user defined Transmit filter SENS DDEM TFIL USER D MyTXFilter Selects the user defined filter MyTXFilter Mode VSA SENSe DDEMod TIME ResultLength The command determines the number of displayed symbols result length Setting ...

Страница 316: ...ns the order of the active UserQAM Usage Query only Mode VSA SENSe FREQuency CENTer Frequency This command defines the center frequency frequency domain or measuring fre quency time domain Parameters Frequency Range 0 to fmax RST fmax 2 Default unit Hz fmax is specified in the data sheet min span is 10 Hz Example FREQ CENT 100 MHz Manual operation See Center on page 110 See Frequency on page 150 S...

Страница 317: ...e 100 GHz to 100 GHz RST 0 Hz Default unit Hz Example FREQ OFFS 1GHZ Manual operation See Frequency Offset on page 110 SENSe SWEep COUNt VALue SweepCount This command sets the statistics count Entering 0 as a parameter activates Auto mode Entering a number greater than 0 activates Manual mode and sets the statis tics count to the corresponding number For more information see Statistics Count on pa...

Страница 318: ...egisters spe cific to the R S FSV K70 option For details see Chapter 5 Status Reporting System Option R S FSV K70 on page 332 STATus QUEStionable CONDition 319 STATus QUEStionable EVENt 319 STATus QUEStionable MODulation n ENABle 319 STATus QUEStionable MODulation n CONDition 319 STATus QUEStionable MODulation n EVENt 320 STATus QUEStionable MODulation n NTRansition 320 STATus QUEStionable MODulat...

Страница 319: ...tion filters It is permanently updated by the instrument This part can only be read by the user Reading the register clears it Example STAT QUES Usage Query only Mode all STATus QUEStionable MODulation n ENABle Enable Determines whether the EVENt bit of the STATus QUEStionable MODulation n register contributes to the sum bit of the STATus QUEStionable register Suffix n 1 4 Setting parameters Enabl...

Страница 320: ...n n Register on page 335 Suffix n 1 4 Usage Query only SCPI confirmed Mode VSA STATus QUEStionable MODulation n NTRansition NTransition This bit acts as a transition filter When a bit of the CONDition part of the STATus QUEStionable MODulation n register is changed from 1 to 0 the NTR bit decides whether the EVENt bit is set to 1 Suffix n 1 4 Setting parameters NTransition 0 the EVENt bit is not s...

Страница 321: ...y limit violations in Carrier Frequency evaluation EVM limit violations in EVM evaluation FSK limit violations in FSK evaluation IQRHo limit violations in I Q Offset and RHO evaluation MAGNitude limit violations in Magnitude Error evaluation PHASe limit violations in Phase Error evaluation Usage Query only SCPI confirmed Mode VSA STATus QUEStionable MODulation n ResultType CONDition Contains the r...

Страница 322: ...valuation MAGNitude limit violations in Magnitude Error evaluation PHASe limit violations in Phase Error evaluation Setting parameters Mode 0 the associated EVENt bit does not contribute to the sum bit 1 if the associated EVENt bit is 1 the sum bit is set to 1 as well Usage Query only SCPI confirmed Mode VSA STATus QUEStionable MODulation n ResultType NTRansition Mode This bit acts as a transition...

Страница 323: ...er Frequency evaluation EVM limit violations in EVM evaluation FSK limit violations in FSK evaluation IQRHo limit violations in I Q Offset and RHO evaluation MAGNitude limit violations in Magnitude Error evaluation PHASe limit violations in Phase Error evaluation Setting parameters Enable 0 the EVENt bit is not set 1 the EVENt bit is set Usage Query only SCPI confirmed Mode VSA STATus QUEStionable...

Страница 324: ...tion in the corresponding bit of the associated regis ter The transition also writes a 1 into the associated bit of the corresponding EVENt register Parameters SumBit Range 0 to 65535 ChannelName String containing the name of the channel The parameter is optional If you omit it the command works for the currently active channel STATus QUEStionable SYNC PTRansition SumBit ChannelName These commands...

Страница 325: ... n DATA Trace This command queries the trace data The data the R S FSVA FSV returns for each result display is as follows Capture Buffer For the Capture Buffer result display the command returns the y axis values of the data that is stored in the capture buffer The number of returned values depends on the size of the capture buffer and the oversampling rate For example a capture buffer of 500 in c...

Страница 326: ...ch number in the table The number of returned values depends on the modulation scheme you have selected If no parameter is specified the command always returns the values in the decimal format If the parameter STRace is used the format depends on the currently defined symbol format see CALCulate n FORMat on page 247 Eye diagram For eye diagrams the command returns one value for each sample The num...

Страница 327: ...arameter is specified the command always returns the values in the decimal format Note that no leading zeros are returned see example below Example TRAC TRACE1 Queries data from trace 1 Example calc4 form BINary trace4 data strace Queries data from symbol table in binary format Result no leading zeros 1 1110 11 10 100 111 1101 1 1010 101 10 10 100 1111 Mode VSA TRACe n IQ BWIDth This command queri...

Страница 328: ...analysis bandwidth to 40 MHz FORCe160 The bandwidth extension option R S FSV B160 is always used if no other restrictions for its use apply see Chapter 2 2 2 1 Restrictions on page 14 thus raising the minimum possible sample rate to 32 MHz RST ON Manual operation See Maximum Bandwidth on page 155 4 15 TRIGger subsystem TRIGger n SEQuence LEVel BBPower 328 TRIGger n SEQuence BBPower HOLDoff 329 TRI...

Страница 329: ...e to 200 ns Mode all Manual operation See Trigger Holdoff on page 157 TRIGger n SEQuence LEVel IFPower TriggerLevel This command defines the power level at the third intermediate frequency that must be exceeded to cause a trigger event Note that any RF attenuation or preamplification is considered when the trigger level is analyzed If defined a reference level offset is also considered Suffix n ir...

Страница 330: ... the IF power trigger source TRIG IFP HYST 10DB Sets the hysteresis limit value Manual operation See Trigger Hysteresis on page 157 TRIGger n SEQuence HOLDoff TIME Delay This command defines the length of the trigger delay A negative delay time pretrigger can be set in zero span only Suffix n irrelevant Parameters Delay Range zero span sweeptime see data sheet to 30 s span 0 to 30 s RST 0 s Exampl...

Страница 331: ...er modes refer to the Trg Gate Source softkey in the base unit description Suffix n irrelevant Parameters Source IMMediate Free Run EXTern External trigger IFPower Power trigger at the second intermediate frequency BBPower Baseband power for digital input via the R S Digital I Q Inter face R S FSV B17 RST IMMediate Example TRIG SOUR EXT Selects the external trigger input as source of the trigger s...

Страница 332: ...UEStionable SYNC n contains application specific information about synchronization errors or errors during burst detection STATus QUESTionable MODulation n provides information on any limit violations that occur after demodulation in one of the 4 windows STATus QUESTionable MODulation n EVM limit violations in EVM evalua tion STATus QUESTionable MODulation n PHASe limit violations in Phase Error e...

Страница 333: ...4 3 2 1 0 CURRent MEAN PEAK 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 CRHo MRHo PRHo CIQOffset MIQOffset PIQOffset 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RFECurrent RFEMean RFEPeak PFECurrent PFEMean PFEPeak FDECurrent FDEMean FDEPeak 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RCURrent RMEan RPEak PCURrent PMEan PPEak STAT QUES MOD MAGN STAT QUES MOD CFR STAT QUES MOD IQRH STAT QUES MOD FSK STAT QUES SYNC S...

Страница 334: ...questionable temperature occurs 5 FREQuency The bit is set if a frequency is questionable see STATus QUEStionable FREQuency regis ter 6 Not used 7 MODulation The bit is set if a limit violation occurs after demodulation see STATus QUEStionable MODula tion n Register 8 CALibration The bit is set if a measurement is performed unaligned UNCAL display 9 LIMit device specific This bit is set if a limit...

Страница 335: ...onable SYNC register for R S FSV K70 Bit Definition 0 Burst not found This bit is set if a burst could not be detected 1 Sync not found This bit is set if the sync sequence pattern of the midamble could not be detected 2 to 14 Not used 15 This bit is always 0 5 3 STATus QUEStionable MODulation n Register This register comprises information about any limit violations that may occur after demodulati...

Страница 336: ...ed 5 Error in current peak value 6 Error in mean peak value 7 Error in peak peak value 8 15 These bits are not used 5 5 STATus QUESTionable MODulation n PHASe Reg ister This register comprises information about limit violations in Phase Error evaluation It can be queried with commands STATus QUEStionable MODulation n PHASe CONDition and STATus QUEStionable MODulation n PHASe EVENt Bit No Meaning 0...

Страница 337: ...peak value 6 Error in mean peak value 7 Error in peak peak value 8 15 These bits are not used 5 7 STATus QUESTionable MODulation n CFRequency Register This register comprises information about limit violations in Carrier Frequency evalua tion It can be queried with commands STATus QUEStionable MODulation n CFREQuency CONDition and STATus QUEStionable MODulation n CFREQuency EVENt Bit No Meaning 0 ...

Страница 338: ... information about limit violations in FSK evaluation It can be queried with commands STATus QUEStionable MODulation n FSK CONDition and STATus QUEStionable MODulation n FSK EVENt Bit No Meaning 0 Error in current Frequency Error RMS value 1 Error in mean Frequency Error RMS value 2 Error in peak Frequency Error RMS value 3 4 These bits are not used 5 Error in current Frequency Error peak value 6 ...

Страница 339: ...roblem faster 6 1 Explanation of Error Messages The following section describes error messages and possible causes Message Burst Not Found 339 Message Pattern Not Found 342 Message Sync failed Check for all zero signal 343 Message Result Alignment Failed 343 Message Pattern Search On But No Pattern Selected 345 Message Pattern Not Entirely Within Result Range 345 Message Short Pattern Pattern Sear...

Страница 340: ...trigger settings and or enlarge the capture length For more information see I Q Capture on page 152 The current measurement is being performed on a burst that has not been captured completely Figure 6 3 Example for measurement on incomplete burst capture Figure 6 4 Example for measurement on complete burst capture Solution Change the trigger settings or increase the result length Note however that...

Страница 341: ... marker to the end of the burst and compare the burst length to the settings in the Signal Description dialog Increase the search tolerance in the Burst Search dialog Keep an eye on the green red field If the burst search succeeds you can see the length of the found bursts Set the minimum burst length to 50 and the maximum burst length to 5000 For more information see Signal Description on page 14...

Страница 342: ...ge alignment Message Pattern Not Found The Pattern Not Found error message can have several causes The burst search has failed If burst and pattern search are active the application looks for patterns only within the found bursts Hence in case the burst search fails the pattern search will also fail Solution Try one of the following Make sure the burst search is successful Deactivate the burst sea...

Страница 343: ...t possible in the R S FSV K70 Solution Make sure that the correct pattern is specified in the Signal Description dialog For more information see Signal Description on page 146 Message Sync failed Check for all zero signal A prerequisite for correct synchronization is a random data sequence of an adaquate size Solution Make sure the input signal contains an adaquate number of uncorrelated random bi...

Страница 344: ...enter is not pos sible because there are not enough samples in the capture buffer before the burst starts In this scenario the trigger settings should be changed such that the burst is in the middle of the capture buffer Solution Change the trigger settings and or enlarge the capture length For more information see I Q Capture on page 152 Explanation of Error Messages ...

Страница 345: ...ern as reference of your result range alignment Then the pattern will be forcefully part of your result range and the pattern search can succeed For more information see Result Range on page 165 Chapter 3 3 2 Defining the Result Range on page 181 Message Short Pattern Pattern Search Might Fail The R S FSVA FSV performs the pattern search in two stages Stage 1 involves the generation of an I Q patt...

Страница 346: ... Symbols Note Note that this message does not necessarily indicate a problem Its purpose is to inform you that you might have the opportunity to get a more stable demodulation and or better measurement results by improving your setup Synchronization in the R S FSV K70 is performed in two stages coarse synchroniza tion that precedes the reference signal generation and fine synchronization based on ...

Страница 347: ...e pattern make sure it does not exceed the burst ramps and choose Continuous Signal as the Signal Type in the Signal Descrip tion dialog For more information see Chapter 2 4 Demodulation Overview on page 42 Message Sync Prefers Longer Pattern This message can only occur if the coarse synchronization is data aided i e is based on a known pattern In case the pattern is very short pattern based coars...

Страница 348: ...a is evalu ated more than once For example the same peak value may be listed several times if it is included in several result ranges and averaging is performed on partially dupli cate values However a negative influence on the measurement results is not to be expected 6 2 Flow Chart for Troubleshooting If you experience a concrete measurement problem you might want to try solving it with the help...

Страница 349: ...an be problematic If you have a pattern you can try to use it for synchronization i e use the setting Coarse Synchronization Pattern no Is your Result Range larger than 8xModulation Order e g 8x4 32 for QPSK yes yes Can you increase the length of your Result Range E g is your burst actually larger no Increase the Result Range to at least 8xModulation Order no yes yes Hard to find the origin of the...

Страница 350: ...ange to the desired point in the capture buffer Make sure the pattern is indicated in the Signal Description dialog Do you see a Pattern Not Found Message Please refer to the Error Messages section in the manual yes Make sure your Result Range Alignment reference is Pattern Waveform Range Setting Dialog 1 Go back to 1 yes From 1 no Please refer to the Error Messages section in the manual 6 3 Frequ...

Страница 351: ...ls despite correct settings A prerequisite for correct synchronization is a random data sequence of an adaquate size Solution Make sure the input signal contains an adaquate number of uncorrelated random bits Not 0 0 0 0 0 1 1 1 1 1 or 01 01 01 01 01 for example For QAM modulation the result length the data on which synchronization is based should correspond to at least 8 times the modulation orde...

Страница 352: ...ess the key to select the measurement screen 2 Press the TRACE key 3 Press the Trace Wizard softkey 4 Select a second trace and choose the preferred Trace Mode e g Max Hold or Average Problem The spectrum is not displayed in the logarithmic domain Solution 1 Press the key to select the measurement screen Frequently Asked Questions ...

Страница 353: ...ion i e for a π 4 DQPSK 4 instead of 8 points are displayed The inter symbol interference has been removed In case the measurement filter does not remove the inter symbol interference the screens show measurements that are significantly different Problem The Constellation I Q measurement result display has a different num ber of constellation points in the R S FSQ K70 and the R S FSV K70 Reason In...

Страница 354: ...an MSK FSK reference signal the R S FSQ K70 automatically replaces the Dirac pulses generated by the frequency mapper with square pulses with the length of one symbol In the R S FSV K70 however this replacement is part of the transmit filter routine Thus the R S FSQ and the R S FSV require different trans mit filters for measuring the same FSK MSK signal Example If your transmit filter for the R S...

Страница 355: ...play Figure 6 13 Solution Result Summary with correct evaluation range setting Make sure that the same samples are evaluated The EVM trace displays as default all sample instants e g if the Capture Oversampling is 4 the EVM trace shows 4 samples per symbol The Result Summary does not forcefully evaluate all Frequently Asked Questions ...

Страница 356: ...ted as the difference between the measured frequency deviation and the reference frequency deviation as entered by the user see FSK Ref Deviation on page 145 What is referred to as the FSK DEV ERROR in the R S FSQ K70 is calculated differently see the R S FSQ K70 Soft ware Manual and is comparable to the Freq Err RMS in the R S FSV K70 How ever while the FSK DEV ERROR in the R S FSQ K70 is given i...

Страница 357: ... the unit none In this case none means the measured signal has been scaled such that it matches the ideal corresponding ref erence signal as well as possible The reference signal in turn is scaled such that max abs at symbol instants 1 0 Question How can I get the demodulated symbols of all my GSM bursts in the capture buffer in remote control Answer Use the following remote commands SENSe1 DDEMod...

Страница 358: ...l bursts and query the demodulated symbols Question Why do the EVM results for my FSK modulated signal look wrong Answer For an FSK modulated signal the signal processing differs to an PSK QAM MSK modulated signal The estimation model does not minimize the EVM but the error of the instantaneous frequency see Chapter 2 5 2 1 Error Model on page 62 There fore the measurement value that corresponds t...

Страница 359: ...c Filters 366 A 1 1 Trace based Evaluations The trace based evaluations all take place at the sample rate defined by the Display Points Per Symbol parameter see Display Points Sym on page 179 The sampling instants at this rate are referred to as t here i e t n TD where TD equals the duration of one sampling period at the sample rate defined by the Display Points Per Symbol parameter Test parameter...

Страница 360: ...ignals are the same as those available for linear modulation types However as the signal processing for FSK signals is performed on the magnitude and instantaneous frequency the I Q based results first require a recon struction of the reference and measured I Q waveforms as illustrated in Reconstruc tion of the reference and measured I Q waveforms for FSK modulation The dashed outline of the compe...

Страница 361: ...e is timing compensated using the timing offset estimated from the measured instantaneous frequency This ensures that the measured magnitude and frequency remain synchronized in the reconstructed I Q waveform A 1 2 Result Summary Evaluations The evaluations for the result summary take place at the sample rate defined by the Display Points Per Symbol parameter see Display Points Sym on page 179 Thi...

Страница 362: ...istor tion model parameters as follows Table A 1 Evaluation of results in the PSK QAM and MSK result summary EVM RMS n D T n EVM N 2 1 Peak D T n EVM max Modulation error RMS k n D T k REF K T n EV N 2 2 10 1 1 log 20 Peak k n D D D T k REF K T n EV N T n MER with T n MER 2 2 10 1 1 log 20 min Magnitude error RMS n D T n ERR MAG N 2 _ 1 Peak D T n ERR MAG _ max Phase error RMS n D T n ERR PHASE N ...

Страница 363: ...itude Droop A T lin e A Sym dB A A lin 10 log 20 A 1 2 2 FSK Modulation For FSK modulation the estimation model is described in detail in section Chap ter 2 5 2 FSK Modulation on page 60 The parameters of the FSK specific result summary table can be related to the distortion model parameters as follows Table A 2 Evaluation of results in the FSK result summary Frequency Error RMS n D T n ERR FREQ N...

Страница 364: ...esult Summary The statistical evaluations in the result summary are based on the measurement results that are displayed in the Current column Hence the index m here repre sents the current evaluation M is the total number of evaluations In single sweep mode M coresponds to the statistics count If the measurement values are represented in the logarithmic domain the linear values are averaged The re...

Страница 365: ...s the sth sample within the trace If the measurement results are represented in logarithmic domain the average opera tion is performed on the linear values The result is then subsequently converted back into logarithmic domain Measurements Calculation in R S FSVA FSV RMS Average M s x Error Vector Magnitude EVM Meas Ref magnitude Capture Buffer magnitude M x x M x M s M s M s 2 2 1 1 Linear Averag...

Страница 366: ...4 1 4 1 sin 1 cos 4 T t T T t T t T t t h Gaussian filter Gauss ETSI TS 100 959 V8 3 0 BT T T t t h 2 2 exp 2 2 2 with BT 2 2 ln A 1 6 Standard Specific Filters A 1 6 1 Transmit filter EDGE Tx filter ETSI TS 300 959 V8 1 2 Linearized GMSK else 0 5T t 0 for 3 0 0 i iT t S t c else 0 8 4 for 2 sin 4 t 0 for sin 4 0 0 T t T dt t g T dt t g t S T t t 2 ln 2 3 3 0 2 2 ln 2 5 3 0 2 2 1 T T t Q T T t Q T...

Страница 367: ...2 Measurement Filter EDGE Measurement filters RC filter Alpha 0 25 single side band 6 dB bandwith 90 kHz Windowing by multi plying the impulse response according to the following equation T t T t T T T t T t t w 75 3 0 75 3 5 1 25 2 5 1 cos 1 5 0 5 1 0 1 The following figure shows the frequency response of the standard specific measure ment filters Formulae ...

Страница 368: ...Formulae and Abbreviations R S FSV K70 368 Operating Manual 1176 7578 02 09 Formulae ...

Страница 369: ...ns R S FSV K70 369 Operating Manual 1176 7578 02 09 Low ISI Filters The following frequency responses are obtained when using a low ISI measurment fil ter and the Transmit filter indicated in the title of each diagram Formulae ...

Страница 370: ...Formulae and Abbreviations R S FSV K70 370 Operating Manual 1176 7578 02 09 Formulae ...

Страница 371: ...Formulae and Abbreviations R S FSV K70 371 Operating Manual 1176 7578 02 09 Formulae ...

Страница 372: ...Formulae and Abbreviations R S FSV K70 372 Operating Manual 1176 7578 02 09 Formulae ...

Страница 373: ... The following abbreviations are commonly used in the description of the R S FSV K70 option Abbreviation Meaning See section FSK Frequency Shift Keying Modulation mode for which the information is encrypted in the fre quency Frequency Shift Keying FSK ISI Inter symbol Interference Abbreviations ...

Страница 374: ...dge of the sent data contents Demodulation and Algorithms PSK Phase Shift Keying Modulation mode for which the information lies within the phase or within the phase transitions Phase Shift Keying PSK QAM Quadrature Amplitude Modulation Modulation mode for which the information is encrypted both in the amplitude and phase Quadrature Amplitude Modulation QAM RMS Root Mean Square Averaging RMS Quanti...

Страница 375: ...he most common measurements are predefined as standard settings for a large num ber of mobile radio networks The instrument comes prepared with the following set tings for those standards Capture length and result length Signal description Modulation Transmit filter and measurement filter Burst Pattern search configuration Result range alignment Evaluation range settings Display configuration The ...

Страница 376: ...K GSM 270 83333 kHz GMSK NONE 0 3 GSM_SB0 GSM_SB2 148 Pattern to Center 3 144 GSM_Fre quency Burst DMSK GSM 270 83333 kHz GMSK NONE 0 3 GSM_FB0 GSM_FB01 148 Pattern to Center 3 144 GSM_Acce ssBurst DMSK GSM 270 83333 kHz GMSK NONE 0 3 GSM_AB0 GSM_AB2 88 Pattern to Center 8 85 EDGE_8PS K 3π 8 8PSK EDGE 270 833 kHz Linearized GMSK EDGE_NSR EDGE_TSC0 EDGE_TS7 148 Pattern to Center 3 144 75 EDGE_16Q A...

Страница 377: ... 4 QPSK EDGE 325 kHz EDGE Wide Pulse Shape EDGE HSR Wide Pulse EDGE_HSR_Q PSK_TSC0 EDGE_HSR_Q PSK_TSC1 7 177 Pattern to Center 4 172 75 EDGE_16Q AM_HSR_ Narrow Pulse π 4 16QAM EDGE 325 kHz EDGE Nar row Pulse Shape EDGE HSR Narrow Pulse EDGE_HSR_1 6QAM_TSC0 EDGE_HSR_1 6QAM_TSC1 7 177 Pattern to Center 4 172 75 EDGE_16Q AM_HSR_ WidePulse π 4 16QAM EDGE 325 kHz EDGE Wide Pulse Shape EDGE HSR Wide Pul...

Страница 378: ... kHz RRC RRC 0 35 TETRA_S1 TETRA_S3 246 Burst to Center 0 244 TETRA_Co ntinuous Downlink π 4 DQPSK TETRA 18 kHz RRC RRC 0 35 TETRA_E TETRA_S 255 Burst to Center 0 244 3GPP 3G_WCDM A QPSK WCDMA 3 84 MHz RRC RRC 0 22 800 Capture Left CDMA CDMA2000 _1X_FWD QPSK CDMA2K_F WD 1 2288 MHz CDMA 2000 1X FWD Low ISI Meas Filter 800 Capture Left CDMA2000 _1X_REV Offset QPSK Gray 1 2288 MHz CDMA 2000 1X Revers...

Страница 379: ...e tooth_EDR_Sy nc_2 DHx 242 Pattern Left Blue tooth_2_DH 3 π 4 DQPSK BT_EDR2 1 MHz RRC RRC 0 4 Blue tooth_EDR_Sy nc_2 DHx 1494 Pattern Left Blue tooth_2_DH 5 π 4 DQPSK BT_EDR2 1 MHz RRC RRC 0 4 Blue tooth_EDR_Sy nc_2 DHx 2742 Pattern Left Blue tooth_3_DH 1 π 4 DQPSK BT_EDR3 1 MHz RRC RRC 0 4 Blue tooth_EDR_Sy nc_3 DHx 242 Pattern Left Blue tooth_3_DH 3 π 4 DQPSK BT_EDR3 1 MHz RRC RRC 0 4 Blue toot...

Страница 380: ...RRC 0 35 90 Capture Left DVB_s2_16 APSK UserQAM 16ary DVB_S2_16 APSK_34 20 MHz RRC RRC 0 35 180 Capture Left DVB_S2_3 2APSK UserQAM 32ary DVB_S2_32 APSK_34 20 MHz RRC RRC 0 35 270 Capture Left DVB_S2_Q PSK QPSK DVB_S2_Q PSK 20 MHz RRC RRC 0 35 90 Capture Left ZIGBEE ZIG BEE_BPSK _868M_300 K BPSK Natural 300 kHz RC None 1 0 1000 Busrt to Center ZIG BEE_BPSK _915M_600 K BPSK Natural 600 kHz RC None ...

Страница 381: ...0 SENSe DDEMod MAPPing CATalog 290 SENSe DDEMod MAPPing VALue 290 SENSe DDEMod MFILter AUTO 291 SENSe DDEMod MFILter NAME 291 SENSe DDEMod MFILter USER 292 SENSe DDEMod MFILter STATe 292 SENSe DDEMod MSK FORMat 292 SENSe DDEMod NORMalize ADRoop 293 SENSe DDEMod NORMalize CFDRift 293 SENSe DDEMod NORMalize FDERror 293 SENSe DDEMod NORMalize IQIMbalance 294 SENSe DDEMod NORMalize IQOFfset 294 SENSe ...

Страница 382: ...d SEARch SYNC IQCThreshold 308 SENSe DDEMod SEARch SYNC MODE 309 SENSe DDEMod SEARch SYNC NAME 309 SENSe DDEMod SEARch SYNC NSTate 309 SENSe DDEMod SEARch SYNC PATTern ADD 310 SENSe DDEMod SEARch SYNC PATTern REMove 310 SENSe DDEMod SEARch SYNC SELect 310 SENSe DDEMod SEARch SYNC STATe 311 SENSe DDEMod SEARch SYNC TEXT 311 SENSe DDEMod SIGNal PATTern 311 SENSe DDEMod SIGNal VALue 312 SENSe DDEMod ...

Страница 383: ...245 CALCulate n DLRel VALue 245 CALCulate n ELIN startstop STATe 246 CALCulate n ELIN startstop VALue 246 CALCulate n FEED 247 CALCulate n FORMat 247 CALCulate n FSK DEViation COMPensation 249 CALCulate n FSK DEViation REFerence RELative 249 CALCulate n FSK DEViation REFerence VALue 249 CALCulate n LIMit MACCuracy ResultType LimitType STATe 215 CALCulate n LIMit MACCuracy ResultType LimitType RESU...

Страница 384: ...MACCuracy STATe 215 CALCulate n MARKer m AOFF 222 CALCulate n MARKer m FUNCtion DDEMod STATistic ADRoop 222 CALCulate n MARKer m FUNCtion DDEMod STATistic ALL 223 CALCulate n MARKer m FUNCtion DDEMod STATistic CFERror 223 CALCulate n MARKer m FUNCtion DDEMod STATistic EVM 224 CALCulate n MARKer m FUNCtion DDEMod STATistic FDERror 225 CALCulate n MARKer m FUNCtion DDEMod STATistic FSK CFDRift 226 C...

Страница 385: ...LCulate n TRACe t ADJust ALIGnment OFFSet 254 CALCulate n TRACe t ADJust ALIGnment DEFault 255 CALCulate n TRACe t ADJust VALue 255 CALCulate n TRACe t VALue 256 CALCulate n UNIT ANGLe 256 CALCulate n X UNIT TIME 257 DISPlay WINDow n PRATe AUTO 258 DISPlay WINDow n PRATe VALue 258 DISPlay WINDow n SIZE 258 DISPlay WINDow n STATe 259 DISPlay WINDow n TRACe t MODE 259 DISPlay WINDow n TRACe t SYMBol...

Страница 386: ...277 MMEMory SELect ITEM VIQData 278 MMEMory STORe IQ COMM 278 MMEMory STORe IQ FORMat 279 MMEMory STORe IQ STATe 278 MMEMory STORe n TRACe 279 OUTPut DIQ 280 OUTPut DIQ CDEVice 280 STATus QUEStionable CONDition 319 STATus QUEStionable MODulation n ResultType CONDition 321 STATus QUEStionable MODulation n ResultType ENABle 322 STATus QUEStionable MODulation n ResultType NTRansition 322 STATus QUESt...

Страница 387: ... STATe 327 TRACe n IQ BWIDth 327 TRACe n DATA 325 TRIGger n SEQuence BBPower HOLDoff 329 TRIGger n SEQuence HOLDoff TIME 330 TRIGger n SEQuence IFPower HOLDoff 329 TRIGger n SEQuence IFPower HYSTeresis 330 TRIGger n SEQuence LEVel BBPower 328 TRIGger n SEQuence LEVel IFPower 329 TRIGger n SEQuence SLOPe 330 TRIGger n SEQuence SOURce 331 ...

Страница 388: ...159 Tolerance remote control 304 Burst Signal 147 Bursts Length remote control 302 Useful length 147 C Capture Length I Q Capture 154 I Q Capture remote control 300 Capture Oversampling 154 Remote control 295 Capture Unit Softkey 114 Carrier Frequency Drift Compensation 170 Center frequency 110 CF Stepsize 110 Characters Special 206 Clear Write trace mode 121 201 Coarse Synchronization 172 Command...

Страница 389: ...ye size 200 Eye Diagram Frequency Result type 79 Eye Diagram Imag Q Result type 78 Eye Diagram Real I Result type 77 F Filter bandwidth Digital I Q remote control 327 Filters Activating remote control 287 292 314 Alpha BT remote control 314 Customized 19 Selecting remote control 314 Fine Synchronization 173 Folders New 109 Free Run Softkey 124 frequency offset 110 Frequency Center 110 RF Settings ...

Страница 390: ...nse 369 Lower Level Hysteresis Softkey 117 Lower case commands 205 M Magnitude Absolute Result type 70 Magnitude Error Result type 86 Magnitude Relative Result type 71 Mapping 21 145 marker peak 131 Markers Coupling 129 Coupling remote control 234 Selecting 130 Set to trace 130 Setting to Trace 131 Settings 130 131 Matched filter 14 Max Hold trace mode 121 201 Max Peak softkey 132 maximum search 1...

Страница 391: ...polarity external trigger 125 157 trigger edge 125 157 pre trigger 126 156 Preamplifier B22 114 151 Printing Results 105 Screenshots 105 PSK mixed forms 28 R R S Digital I Q Interface B17 139 272 280 R S Support softkey 138 140 Range Settings Softkey 127 Ranges Softkey 111 Softkey statistic measurements 112 Softkey Symbol Table 113 Real Imag I Q Result type 76 Receive filter 15 Recording tool Know...

Страница 392: ...t Peak remote control 209 210 211 235 236 237 238 Peak 131 Peak remote control 209 236 R S Support 138 140 Range Lin Unit remote control 266 Range Linear remote control 266 Range Log remote control 262 266 Ref Level Offset remote control 265 Ref Level Position remote control 265 Ref Value remote control 266 Ref Value Position remote control 265 Reference Position remote control 265 Right Limit rem...

Страница 393: ...nt 119 Status registers STATus QUEStionable 334 Status reporting system 332 Swap I Q 155 Sweep Continue single sweep 118 Continuous 118 Single 118 Switching on the option 67 Symbol mapping 21 Symbol rate 145 Remote control 312 Symbol tables Result type 83 Symbols Display Configuration 176 Synchronization Fails troubleshooting 351 Syntax Known data files 197 T Trace Clear Write 121 201 Trace mode 1...

Страница 394: ...y 112 117 185 186 Y Axis Range Softkey 111 187 Y Axis Reference Position Softkey 112 184 186 Y Axis Reference Value Softkey 112 184 186 Y Axis Unit Softkey 114 YIG filter see YIG preselector 116 151 YIG preselector Activating Deactivating 116 151 276 Z zoom area remote control 267 remote control 266 Zoom Amplitude 121 202 ...

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