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Rohde & Schwarz R&S CMW-KN5 Series User Manual Download Page 13

General Description

R&S

®

CMW-KN5xx

13

User Manual 1176.7690.02 ─ 05

3.5 Calculation of Modulation Results

Modulation results are based on a comparison between the measured signal, correc-
ted by the average frequency and timing offset for each measured subframe, and an
ideal reference waveform.

See also: "Modulation Accuracy" in the R&S

 

CMW user manual, chapter "System

Overview"

As specified in 3GPP TS 36.104, Annex E, the EVM calculation is based on two differ-
ent FFT processing windows in time domain, separated by the "EVM window length"
W. The minimum test requirement applies to the larger of the two obtained EVM val-
ues.

The definition of the EVM window and the two FFT processing windows is shown
below.

Fig. 3-2: EVM window definition

The EVM window is centered on the Cyclic Prefix (CP) at the beginning of the OFDM
symbol. Its length is specified in the standard, depending on the channel bandwidth
and the cyclic prefix type (see 3GPP TS 36.104, tables E.5.1-1 and F.5.1-2).

The CP is a cyclic extension of the OFDM symbol. As a consequence the EVM for a
signal with good modulation accuracy is expected to be largely independent of the
EVM window size.

Fig. 3-3: Cyclic prefix

 

Calculation of Modulation Results

深圳德标仪器 

135-1095-0799

Summary of Contents for R&S CMW-KN5 Series

Page 1: ...R S CMW KN5xx LTE eNodeB Measurements User Manual User Manual 1176 7690 02 05 ÚÚè2 Test Measurement 深圳德标仪器 135 1095 0799 ...

Page 2: ...ühldorfstr 15 81671 München Germany Phone 49 89 41 29 0 Fax 49 89 41 29 12 164 E mail info rohde schwarz com Internet www rohde schwarz com Subject to change Data without tolerance limits is not binding R S is a registered trademark of Rohde Schwarz GmbH Co KG Trade names are trademarks of the owners The following abbreviations are used throughout this manual R S CMW is abbreviated as R S CMW 深圳德标...

Page 3: ...Results 13 3 6 LTE DL Signal Properties 14 3 6 1 Resources in Time and Frequency Domain 14 3 6 2 Operating Bands 16 3 7 Limit Settings and Conformance Requirements 18 3 7 1 Transmit Modulation Limits 18 3 7 2 Occupied Bandwidth Limits 19 3 7 3 Spectrum Emission Mask 20 3 7 4 ACLR Limits 21 3 8 Measurement Results 22 3 8 1 Overview 23 3 8 2 Detailed Views EVM Magnitude Error Phase Error 24 3 8 3 De...

Page 4: ...oftkeys and Hotkeys 46 4 3 Measurement Results 47 5 Programming 51 5 1 Key Features 51 5 2 Specifying General and Common Measurement Settings 51 5 3 Specifying Required Settings 52 5 4 Specifying Additional Measurement Specific Settings 52 5 5 Configuring the Trigger System 53 5 6 Specifying Limits 53 5 7 Performing Single Shot Measurements 54 5 8 Single Shot and Continuous Measurements 55 6 Comma...

Page 5: ... 6 Trigger Settings 76 6 3 7 Limits Modulation QPSK 79 6 3 8 Limits Modulation 16 QAM 64 QAM 82 6 3 9 Limits Spectrum 84 6 3 10 Signal Configuration Information 87 6 3 11 EVM Results Traces 87 6 3 12 Magnitude Error Results Traces 88 6 3 13 Phase Error Results Traces 89 6 3 14 Spectrum Flatness Results Traces 90 6 3 15 Spectrum Emission Results Traces 90 6 3 16 I Q Constellation Results Traces 91 ...

Page 6: ...Contents R S CMW KN5xx 6 User Manual 1176 7690 02 05 深圳德标仪器 135 1095 0799 ...

Page 7: ...ers can be read independently of each other However they are all organized as follows 1 General Description 2 Application Sheets optional 3 GUI Reference 4 Programming Examples 5 Command Reference The chapters System Overview and Remote Control in the R S CMW user manual provide additional important information independent of the individual firmware applica tions The most important parts are refer...

Page 8: ... of comprehensive command sequences You can check just a single com mand of a sequence to get an example for the syntax of this single command But you can also consider an entire sequence showing the commands in the context of a com mand script under consideration of dependencies and required orders of the com mands The command sequences are written with the intention to list most commands of the ...

Page 9: ...of the LTE eNodeB Multi Evaluation Measurement firmware application Compared to version 3 2 71 there are only edito rial changes Software Version To check your R S CMW software version open the Setup dialog and click HW SW Equipment The initial software version for each remote control command is quoted in the reference description 深圳德标仪器 135 1095 0799 ...

Page 10: ... eNodeB power variation across subcarriers Spectrum Flatness Many of the tests and conformance requirements are specified in 3GPP TS 36 104 or 3GPP TS 36 141 The following sections describe how to perform and configure the measurement Test Setup 10 How to Measure a Downlink LTE Signal 11 Defining the Scope of the Measurement 11 Trigger Modes 12 Calculation of Modulation Results 13 LTE DL Signal Pr...

Page 11: ...argin ensures maximum dynamic range For synchronization to the received signal and proper decoding a number of Mea surement Control settings in the configuration dialog must be in accordance with the measured signal In particular ensure that the following parameters match up E UTRA test model Channel Bandwidth Physical Cell ID With matching Measurement Control settings the R S CMW is able to decod...

Page 12: ...d in the following trigger modes Free Run Fast Sync The measurement starts immediately after it is initiated The R S CMW decodes the signal to derive its slot subframe and frame timing so that the measurement can start at a radio frame boundary Free Run No Sync The measurement starts immediately after it is initiated with out any synchronization This trigger mode is faster than the Free Run Fast S...

Page 13: ...the EVM window length W The minimum test requirement applies to the larger of the two obtained EVM val ues The definition of the EVM window and the two FFT processing windows is shown below Fig 3 2 EVM window definition The EVM window is centered on the Cyclic Prefix CP at the beginning of the OFDM symbol Its length is specified in the standard depending on the channel bandwidth and the cyclic pre...

Page 14: ...o resources in an LTE system are divided into time frequency units called resource elements In the time domain a resource element corresponds to one OFDM symbol In the frequency domain it corresponds to one subcarrier For the mapping of physical channels to resources the resource elements are grouped into Resource Blocks RB Each RB consists of 12 consecutive subcarriers 180 kHz and 6 or 7 consecut...

Page 15: ... is the sample interval Ts Ts can be calculated from the sam pling frequency 30 72 MHz 1 Ts 1 30 72 MHz 32 55 ns Fig 3 5 LTE DL slot structure normal CP The radio frame structure depends on the duplex mode An FDD DL radio frame con tains 20 DL slots grouped into 10 subframes Fig 3 6 LTE DL frame structure for FDD A TDD radio frame is also divided into 10 subframes But for TDD three subframe types ...

Page 16: ...S U U D D downlink U uplink S special subframe 3 6 2 Operating Bands The carrier frequencies for LTE downlink signals are defined in 3GPP TS 36 104 Each operating band contains a number of uplink carrier frequencies identified by channel numbers EARFCN E UTRA Absolute Radio Frequency Channel Number The assignment between channel numbers N and carrier center frequencies F is defined as The tables b...

Page 17: ... 14 758 5280 5280 to 5379 758 to 767 9 15 2600 5380 5380 to 5579 2600 to 2619 9 16 2585 5580 5580 to 5729 2585 to 2599 9 17 734 5730 5730 to 5849 734 to 745 9 18 860 5850 5850 to 5999 860 to 874 9 19 875 6000 6000 to 6149 875 to 889 9 20 791 6150 6150 to 6449 791 to 820 9 21 1495 9 6450 6450 to 6599 1495 9 to 1510 8 22 3510 6600 6600 to 7499 3510 to 3599 9 23 2180 7500 7500 to 7699 2180 to 2199 9 ...

Page 18: ...llowing sections give an overview of the LTE eNodeB Multi Evaluation limit set tings and the related test requirements Transmit Modulation Limits 18 Occupied Bandwidth Limits 19 Spectrum Emission Mask 20 ACLR Limits 21 3 7 1 Transmit Modulation Limits A poor modulation accuracy of the eNodeB transmitter increases the transmission errors in the downlink channel of the LTE network and decreases the ...

Page 19: ...Bandwidth Limits The occupied bandwidth is the width of a symmetric frequency interval around the nominal RF carrier frequency that contains 99 of the total integrated power of the transmitted spectrum According to 3GPP the occupied bandwidth shall be less than the theoretical channel bandwidth This shall be verified with the test model E TM1 1 In the configuration dialog you can set a limit for t...

Page 20: ...nd stop frequencies set an upper absolute and an upper relative power limit and select the resolution bandwidth to be used The start and stop frequencies are defined relative to the edge of the channel band width Example Assume 0 MHz as start frequency and 1 MHz as stop frequency for a channel bandwidth of 1 4 MHz The resulting area ranges from 0 7 MHz to 1 7 MHz relative to the carrier frequency ...

Page 21: ...30 to 10 50 50 0 0 52 0 1 MHz Table 3 3 General power limits for 3 MHz channel bandwidth Start to Stop MHz Absolute Limit Relative Limit dB RBW Power dBm Slope dB MHz Area 1 0 05 to 3 05 32 5 2 0 off 100 kHz Area 2 3 05 to 6 05 38 5 0 off 100 kHz Area 3 6 50 to 20 00 50 0 0 52 0 1 MHz Table 3 4 General power limits for 5 10 15 and 20 MHz channel bandwidth Start to Stop MHz Absolute Limit Relative ...

Page 22: ...Hz X X TDD 5 10 15 20 MHz X X X X The following table provides an overview of the relative and absolute limit values defined by 3GPP The default values correspond to the requirements for a home BS Refer to 3GPP TS 36 141 V10 6 0 section Relative Limit Absolute Limit 6 6 2 Adjacent Channel Leakage power Ratio 44 2 dB home BS 50 dBm MHz local area BS 32 dBm MHz wide area BS Cat A 13 dBm MHz wide are...

Page 23: ...ing results can be displayed Error Vector Magnitude Magnitude Error Phase Error OFDM Symbol Power Spectrum Flatness Spectrum Emission Mask Spectrum ACLR I Q Constellation Diagram Most important results of detailed view TX Measurement See also TX Measurements in the R S CMW user manual chapter System Over view Fig 3 12 LTE eNodeB Multi Evaluation Overview Measurement Results 深圳德标仪器 135 1095 0799 ...

Page 24: ...section applies to the following detailed views Error Vector Magnitude Magnitude Error Phase Error Each of the detailed views shows a diagram and a statistical overview of results Fig 3 13 LTE eNodeB Multi Evaluation Error Vector Magnitude The diagrams bar graphs show the average EVM magnitude error and phase error for each OFDM symbol in the measured subframe The 14 symbols in the subframe are la...

Page 25: ...M symbol of the measured subframe as specified in 3GPP TS 36 141 Annex F 3 3 The 4th OFDM symbol contains exclusively PDSCH so this power can be interpreted as data symbol power Fig 3 14 LTE eNodeB Multi Evaluation OFDM Symbol Power The diagram shows a presentation of the power in the 4th OFDM symbol of the mea sured subframe vs the frequency Each value indicates the total power of 12 subcarri ers...

Page 26: ...wer RMS averaged power over all samples in the subframe Peak Power peak power of all samples in the subframe RSTX Power arithmetic mean value of all reference symbol powers in the sub frame called RSTP in 3GPP TS 36 141 Annex F 3 3 For other screen elements refer to chapter 3 8 11 Common View Elements on page 32 3 8 4 Detailed Views Spectrum Flatness The spectrum flatness is determined for the pos...

Page 27: ...ter carrier fre quency Resolution filters with bandwidths of 30 kHz 100 kHz and 1 MHz are available Traces for all three resolution bandwidths RBW can be displayed in parallel with the 30 kHz continuous trace at the bottom the 1 MHz trace on top and the 100 kHz trace in between In the figure above the 100 kHz trace is present for carrier offset frequencies from 5 to 15 MHz the 1 MHz trace for offs...

Page 28: ...each emission mask area the margin represents the worst value i e the minimum determined for the frequencies of the area Margin minimum P f mask P f trace A negative margin indicates that the trace is located above the limit line i e the limit is exceeded The margin result display presents for each active area a X MHz and a Y dB value for negative neg and positive pos offset frequencies The Y valu...

Page 29: ...3 84 MHz 7 68 MHz All values are absolute power levels in dBm The limit lines in the diagram take account of the configured absolute and relative lim its For each channel type both limits are calculated The less stringent of the two limits applies and is displayed as limit line The relative ACLR results are calculated from the measured powers and displayed in the table below the diagram According ...

Page 30: ...n diagram The constellation diagram depends on the modulation type For an ideal signal the QPSK constellation diagram consists of four points located on a circle around the ori gin with relative phase angles of 90 deg The 16 QAM and 64 QAM modulation schemes produce rectangular patterns with 16 and 64 points respectively The results can be calculated at the low extremities or at the high extremiti...

Page 31: ...DM symbol the RMS average is calculated and displayed as RMS result Additionally the peak value of all samples within the subframe is calculated and displayed as Peak result The two values l h are calculated for low and high EVM window position see chapter 3 5 Calculation of Modulation Results on page 13 I Q Origin Offset power measured at the carrier center frequency Carrier Frequency Error offse...

Page 32: ... knob Select Trace Select the trace types to be displayed in the view X Scale Y Scale Modify the ranges of the X axis and the Y axis Margin On Off For the spectrum emission mask measurement show or hide margin results 3 8 10 Using Markers Use the Marker parameters to activate markers and to modify their position The fol lowing Marker hotkeys are available at the bottom of the GUI Hotkey Descriptio...

Page 33: ...s statistical tables and Average or Max traces are calculated according to the general rules for statistical results See also Statistical Results in the R S CMW user manual chapter System Over view Statistic Count Progress bar for the measurement During the first single shot after the start of the measurement the bar shows the number of elapsed measured subframes relative to the Statistic Count A ...

Page 34: ...dditional measurement substates can be retrieved via remote control Remote command INITiate LTE MEAS i ENB MEValuation ABORt LTE MEAS i ENB MEValuation STOP LTE MEAS i ENB MEValuation FETCh LTE MEAS i ENB MEValuation STATe FETCh LTE MEAS i ENB MEValuation STATe ALL 4 2 Parameters and Settings The most important settings of the LTE eNodeB Multi Evaluation measurement are displayed in the measuremen...

Page 35: ...dalone scenario Remote command ROUTe LTE MEAS i ENB SCENario SALone ROUTe LTE MEAS i ENB SCENario RF Routing Selects the input path for the measured RF signal i e the input connector and the RX module to be used Depending on your hardware configuration there may be dependencies between both parameters Select the RF connector first The Converter parameter offers only val ues compatible with the sel...

Page 36: ... number valid for this band The R S CMW cal culates the resulting frequency Remote command CONFigure LTE MEAS i ENB RFSettings FREQuency CONFigure LTE MEAS i ENB BAND Expected Nominal Power Defines the nominal power of the RF signal to be measured An appropriate value for LTE signals is the peak output power at the DUT during the measurement The Ref Level is calculated as follows Reference level E...

Page 37: ... generated in the mixer Lower dynamic range due to smaller sig nal to noise ratio 0 dB High signal to noise ratio higher dynamic range Risk of intermodulation smaller overdrive reserve Remote command CONFigure LTE MEAS i ENB RFSettings MLOFfset 4 2 2 Measurement Control Settings The Measurement Control parameters configure the scope of the measurement Fig 4 2 Measurement control Repetition 38 Stop...

Page 38: ...imit check results On Limit Failure The measurement is stopped as soon as one of the limits is exceeded irrespective of the repetition mode set If no limit failure occurs it is per formed according to its Repetition mode and Statistic Count Use this setting for measurements that are essentially intended for checking limits e g production tests Remote command CONFigure LTE MEAS i ENB MEValuation SC...

Page 39: ...ected E UTRA test model All test models currently defined by 3GPP use special subframe configuration 8 The configurations are defined in 3GPP TS 36 211 chapter 4 Frame Structure Each configuration defines the inner structure of a special subframe i e the lengths of DwPTS GP and UpPTS Remote command n a Cyclic Prefix Displays the cyclic prefix length normal or extended according to the selected E U...

Page 40: ...lection P S SYNCH Tx Antenna Select via which antenna the synchronization signals are transferred This is required to suppress the display of synchronization errors if two antennas are used and the synchronization signals are transferred via the not connected antenna In that case the measurement can still synchronize But the maximum allowed fre quency error range is reduced to 7 5 kHz A larger fre...

Page 41: ...width and the cyclic prefix The R S CMW uses the Current value This value is linked to the value in the table corresponding to the current cyclic prefix at present only normal CP and bandwidth settings The window length defines the two sets of l h modulation quantities in the result tables see chapter 3 5 Calculation of Modulation Results on page 13 The minimum value of 1 FFT symbol actually corre...

Page 42: ... the statistic count For emission mask ACLR results the measurement interval is completed when the R S CMW has measured a full subframe Remote command CONFigure LTE MEAS i ENB MEValuation SCOunt SPECtrum SEMask CONFigure LTE MEAS i ENB MEValuation SCOunt SPECtrum ACLR Emission Mask Meas Filter Selects the resolution filter type for filter bandwidths of 100 kHz and 1 MHz gaussian or bandpass filter...

Page 43: ...quire additional options Free Run Fast Sync The measurement starts immediately after it is initiated The R S CMW decodes the signal to derive its slot and frame timing This procedure is repeated after each measurement cycle If you want to measure a MIMO signal ensure that the measured antenna trans mits the synchronization signals PSS and SSS Otherwise the synchronization and this trigger method w...

Page 44: ... attenuation settings are in accordance with the test setup then the trigger threshold is referenced to the actual maximum RF input power at the R S CMW A low threshold may be required to ensure that the R S CMW can always detect the input signal A higher threshold can prevent unintended trigger events Remote command TRIGger LTE MEAS i ENB MEValuation THReshold Trigger Delay Defines a time delayin...

Page 45: ... the search window for synchronization normal or enhanced If the trigger signal is timed accurately the normal synchronization mode is sufficient and should be used for performance reasons With increasing inaccuracy of the trigger signal timing the search window in normal mode may be too small resulting in a Syn chronization Problem In that case select the enhanced mode to increase the search wind...

Page 46: ...B MEValuation LIMit SEMask LIMit no CBANdwidth Band CONFigure LTE MEAS i ENB MEValuation LIMit ACLR UTRA CBANdwidth Band 4 2 7 Shortcut Configuration This section configures a shortcut softkey that provides a fast way to access the GPRF generator from the measurement Fig 4 7 Shortcut configuration Generator Shortcut Selects a GPRF generator instance Softkeys for the selected instance are added to ...

Page 47: ...igure LTE MEAS i ENB MEValuation RESult ACLR etc ARB List Mode Provides access to the most important ARB and list mode settings of the GPRF gener ator Remote command Use the commands of the GPRF generator GPRF Generator Select this softkey and press ON OFF to turn the GPRF generator on or off Press the softkey two times select it and press it again to switch to the generator application The hotkey...

Page 48: ...ce R S CMW KN5xx 48 User Manual 1176 7690 02 05 Fig 4 8 LTE eNodeB Multi Evaluation Overview Most of the detailed views show a diagram and a statistical overview of results Measurement Results 深圳德标仪器 135 1095 0799 ...

Page 49: ...agnitude CURRent etc FETCh LTE MEAS i ENB MEValuation MERRor CURRent etc FETCh LTE MEAS i ENB MEValuation PERRor CURRent etc FETCh LTE MEAS i ENB MEValuation TRACe SEMask RBW kHz CURRent etc FETCh LTE MEAS i ENB MEValuation TRACe SFLatness etc FETCh LTE MEAS i ENB MEValuation TRACe OSPower etc FETCh LTE MEAS i ENB MEValuation TRACe IQ etc FETCh LTE MEAS i ENB MEValuation TRACe ACLR CURRent etc Mea...

Page 50: ...ation CURRent etc FETCh LTE MEAS i ENB MEValuation MODulation EXTReme etc FETCh LTE MEAS i ENB MEValuation SEMask CURRent etc FETCh LTE MEAS i ENB MEValuation SEMask EXTReme FETCh LTE MEAS i ENB MEValuation SEMask MARGin FETCh LTE MEAS i ENB MEValuation SEMask MARGin CURRent NEGativ etc FETCh LTE MEAS i ENB MEValuation ACLR CURRent etc FETCh LTE MEAS i ENB MEValuation MODulation Measurement Result...

Page 51: ...n tax LTE MEAS ENB MEValuation Use general commands of the type LTE MEAS ENB no MEValuation mnemonic to define the signal routing and perform RF and analyzer settings After a RST the measurement is switched off Use READ LTE MEAS ENB MEValuation to initiate a single shot measurement and retrieve the results You can also start the measurement using INIT LTE MEAS ENB MEValuation and retrieve the resu...

Page 52: ...ENB MEValuation CBANdwidth B014 CONFigure LTE MEAS ENB MEValuation PLCid 2 CONFigure LTE MEAS ENB MEValuation MIMO TA1 CONFigure LTE MEAS ENB MEValuation TASelection A1 CONFigure LTE MEAS ENB MEValuation TASYnch A1 5 4 Specifying Additional Measurement Specific Settings Define stop condition stop on limit failure and error handling CONFigure LTE MEAS ENB MEValuation SCONdition SLFail CONFigure LTE...

Page 53: ...ronization mode TRIGger LTE MEAS ENB MEValuation SOURce IF Power TRIGger LTE MEAS ENB MEValuation TOUT 1 TRIGger LTE MEAS ENB MEValuation THReshold 30 TRIGger LTE MEAS ENB MEValuation SLOPe FEDGe TRIGger LTE MEAS ENB MEValuation DELay 0 0001 TRIGger LTE MEAS ENB MEValuation MGAP 3 TRIGger LTE MEAS ENB MEValuation SMODe ENHanced 5 6 Specifying Limits Define QPSK modulation limits Commands for 16 QA...

Page 54: ...hout re starting the measurement FETCh LTE MEAS ENB MEValuation EVMagnitude MAXimum FETCh LTE MEAS ENB MEValuation MERRor AVERage FETCh LTE MEAS ENB MEValuation MERRor MAXimum FETCh LTE MEAS ENB MEValuation PERRor AVERage FETCh LTE MEAS ENB MEValuation PERRor MAXimum FETCh LTE MEAS ENB MEValuation TRACe OSPower FETCh LTE MEAS ENB MEValuation TRACe SFLatness FETCh LTE MEAS ENB MEValuation TRACe IQ ...

Page 55: ...aluation MODulation CURRent 5 8 Single Shot and Continuous Measurements Start single shot measurement return magnitude error bar graph values Return maximum magnitude error and phase bar graph values without repeating the measurement Query the measurement state should be RDY INIT LTE MEAS ENB MEValuation FETCh LTE MEAS ENB MEValuation MERRor CURRent FETCh LTE MEAS ENB MEValuation MERRor MAXimum FE...

Page 56: ...strument supports only one instance or to address the first instance See also Firmware Applications in the R S CMW user manual chapter Remote Control 6 1 2 FETCh READ and CALCulate Commands All commands are used to retrieve measurement results FETCh returns the results of the current measurement cycle single shot mea surement after they are valid FETCh must be used after the measurement has been s...

Page 57: ...s relevant for you Virtual connector names are only relevant for setting commands Queries return the physical connector names Additional information is available in the base software documentation It describes typ ical instrument configurations with the allowed RF connector TX RX module combina tions and the mapping of virtual connector names to physical connectors See also Signal Path Settings in...

Page 58: ...ns are also indicated 6 1 6 Reliability Indicator The first value in the output arrays of FETCh READ and CALCulate queries indicates the most severe error that has occurred during the measurement Example for an output array 0 10 22 10 15 10 01 10 29 100 reliability 0 followed by 5 numeric measurement values The reliability indicator has one of the following values 0 OK Measurement values available...

Page 59: ...the input signal frequency 19 Call not Established For measurements The measurement could not be started because no signaling connection to the DUT was established 20 Call Type not Usable For measurements The measurement could not be started because the estab lished signaling connection had wrong properties 21 Call Lost For measurements The measurement was interrupted because the signaling con nec...

Page 60: ...ettings restart your instrument and press the Factory Default softkey during startup If a software package update has not been properly installed this is often indi cated in the Setup dialog section SW HW Equipment Installed Software A software update correcting the error may be available Updates are e g pro vided in the CMW Customer Web on GLORIS registration required https extranet rohde schwarz...

Page 61: ...e Duplex Mode on page 35 6 2 2 Signal Routing The following commands configure the scenario select the input path for the measured signal and define an external attenuation value ROUTe LTE MEAS i ENB SCENario SALone 61 ROUTe LTE MEAS i ENB SCENario 62 CONFigure LTE MEAS i ENB RFSettings EATTenuation 62 ROUTe LTE MEAS i ENB SCENario SALone RXConnector RFConverter Activates the standalone scenario a...

Page 62: ...B Default unit dB Example See Specifying General and Common Measurement Settings Firmware Software V3 0 20 Manual operation See External Attenuation Input on page 35 6 2 3 Analyzer Settings The following commands configure the RF input path CONFigure LTE MEAS i ENB BAND 62 CONFigure LTE MEAS i ENB RFSettings FREQuency 63 CONFigure LTE MEAS i ENB RFSettings ENPower 63 CONFigure LTE MEAS i ENB RFSet...

Page 63: ...Sets the expected nominal power of the measured RF signal Parameters ExpNomPow The range of the expected nominal power can be calculated as follows Range Expected Nominal Power Range Input Power External Attenuation User Margin Range 55 dBm to 55 dBm for the input power at the RF COM connectors please notice also the ranges quoted in the data sheet RST 0 dBm Default unit dBm Example See Specifying...

Page 64: ...37 6 3 Multi Evaluation Measurement Commands The commands for the LTE eNodeB Multi Evaluation measurement are divided into the groups listed below The general measurement settings also affect the measure ment see chapter 6 2 General Measurement Settings on page 61 Measurement Control and States 65 Enabling Results and Views 67 Measurement Parameters General Part 69 Modulation Measurement Settings ...

Page 65: ...enters the RUN state STOP causes a running measurement to stop after the current evaluation period is terminated and valid results are available the R S CMW enters the RDY state ABORt causes a running measurement to stop immediately the R S CMW enters the OFF state Use FETCh STATe to query the current measurement state See also Measurement Control in the R S CMW user manual chapter Remote Control ...

Page 66: ...e ment substates are relevant for running measurements only Use FETCh STATe to query the main measurement state only Use INITiate STOP ABORt to change the measurement state See also Measurement Control in the R S CMW user manual chapter Remote Control Return values MainState OFF RDY RUN OFF measurement switched off no resources allocated no results available when entered after STOP RDY measurement...

Page 67: ...E MEAS i ENB MEValuation RESult PERRor 68 CONFigure LTE MEAS i ENB MEValuation RESult OSPower 68 CONFigure LTE MEAS i ENB MEValuation RESult SFLatness 68 CONFigure LTE MEAS i ENB MEValuation RESult IQ 68 CONFigure LTE MEAS i ENB MEValuation RESult TXM 68 CONFigure LTE MEAS i ENB MEValuation RESult SEMask 68 CONFigure LTE MEAS i ENB MEValuation RESult ACLR 68 CONFigure LTE MEAS i ENB MEValuation RE...

Page 68: ...lt MERRor Enable CONFigure LTE MEAS i ENB MEValuation RESult PERRor Enable CONFigure LTE MEAS i ENB MEValuation RESult OSPower Enable CONFigure LTE MEAS i ENB MEValuation RESult SFLatness Enable CONFigure LTE MEAS i ENB MEValuation RESult IQ Enable CONFigure LTE MEAS i ENB MEValuation RESult TXM Enable CONFigure LTE MEAS i ENB MEValuation RESult SEMask Enable CONFigure LTE MEAS i ENB MEValuation R...

Page 69: ...TASelection 72 CONFigure LTE MEAS i ENB MEValuation TASYnch 72 CONFigure LTE MEAS i ENB MEValuation TOUT Timeout Defines a timeout for the measurement The timer is started when the measurement is initiated via a READ or INIT command It is not started if the measurement is initiated manually ON OFF key or RESTART STOP key When the measurement has completed the first measurement cycle first single s...

Page 70: ...NB MEValuation SCONdition StopCondition Qualifies whether the measurement is stopped after a failed limit check or continued SLFail means that the measurement is stopped and reaches the RDY state as soon as one of the results exceeds the limits Parameters StopCondition NONE SLFail NONE Continue measurement irrespective of the limit check SLFail Stop measurement on limit failure RST NONE Example Se...

Page 71: ... 38 CONFigure LTE MEAS i ENB MEValuation CBANdwidth ChannelBW Selects the channel bandwidth of the measured LTE signal Parameters ChannelBW B014 B030 B050 B100 B150 B200 B014 1 4 MHz B030 3 MHz B050 5 MHz B100 10 MHz B150 15 MHz B200 20 MHz RST B200 Example See Specifying General and Common Measurement Settings Firmware Software V3 0 20 Manual operation See Channel Bandwidth on page 39 CONFigure L...

Page 72: ...enna 2 second MIMO 2x2 TX antenna RST A1 Example See Specifying Required Settings Firmware Software V3 2 71 Manual operation See MIMO Configuration Tx Antenna Selection on page 40 CONFigure LTE MEAS i ENB MEValuation TASYnch TXantennaSynch Specifies via which antenna the synchronization signals are transferred Parameters TXantennaSynch ALL A1 A2 ALL All antennas SISO antenna or both MIMO 2x2 anten...

Page 73: ...asurements See also Statistical Settings in the R S CMW user manual chapter Remote Con trol Parameters StatisticCount Range 1 subframe to 1000 subframes RST 10 subframes Example See Specifying Additional Measurement Specific Settings Firmware Software V3 0 20 Manual operation See Statistic Count on page 41 CONFigure LTE MEAS i ENB MEValuation MODulation EWLength CPnormB014 CPnormB030 CPnormB050 CP...

Page 74: ...xNormal Samples for normal CP Range see below RST see below Example See Specifying Additional Measurement Specific Settings Firmware Software V3 0 20 Manual operation See EVM Window Length on page 41 Band Range RST 14 1 to 9 5 30 1 to 18 12 50 1 to 36 32 100 1 to 72 66 150 1 to 108 102 200 1 to 144 136 CONFigure LTE MEAS i ENB MEValuation MODulation EWPosition EVMwinPosition Selects which results ...

Page 75: ...re LTE MEAS i ENB MEValuation SPECtrum SEMask MFILter 76 CONFigure LTE MEAS i ENB MEValuation SPECtrum ACLR ENABle 76 CONFigure LTE MEAS i ENB MEValuation SCOunt SPECtrum ACLR StatisticCount CONFigure LTE MEAS i ENB MEValuation SCOunt SPECtrum SEMask StatisticCount Specifies the statistic count of the measurement The statistic count is equal to the number of measurement intervals per single shot U...

Page 76: ... are evaluated When you change the duplex mode or the channel bandwidth 3GPP compliant default values are automatically applied see table 3 5 Parameters EUTRA OFF ON E UTRA channels with the same bandwidth as the carrier UTRA128 OFF ON UTRA channels with 1 28 MHz bandwidth UTRA384 OFF ON UTRA channels with 3 84 MHz bandwidth UTRA768 OFF ON UTRA channels with 7 68 MHz bandwidth Example See Specifyi...

Page 77: ...low Depending on the installed options additional values may be available A complete list of all supported values can be displayed using TRIGger CATalog SOURce Parameters Source Free Run No Sync Free Run without synchronization Free Run Fast Sync Free Run with synchronization IF Power Power trigger received RF power Base1 External TRIG A External trigger fed in at TRIG A connector Base1 External T...

Page 78: ...he measurement relative to the trigger event This setting has no influence on Free Run measurements Parameters Delay Range 250E 6 s to 250E 6 s RST 0 s Default unit s Example See Configuring the Trigger System Firmware Software V3 0 20 Manual operation See Trigger Delay on page 44 TRIGger LTE MEAS i ENB MEValuation TOUT TriggerTimeOut Selects the maximum time that the R S CMW will wait for a trigg...

Page 79: ...ed Parameters SyncMode NORMal ENHanced RST NORM Example See Configuring the Trigger System Firmware Software V3 0 20 Manual operation See Synchronization Mode on page 45 6 3 7 Limits Modulation QPSK The following commands define limits for results which characterize the modulation accuracy of signals with modulation scheme QPSK CONFigure LTE MEAS i ENB MEValuation LIMit QPSK EVMagnitude 79 CONFigu...

Page 80: ...pper limits for the RMS and peak values of the magnitude error for QPSK Parameters RMS Range 0 to 100 RST 18 5 OFF Default unit Additional parameters OFF ON disables enables the limit check Peak Range 0 to 100 RST 35 OFF Default unit Additional parameters OFF ON disables enables the limit check Example See Specifying Limits Firmware Software V3 0 20 CONFigure LTE MEAS i ENB MEValuation LIMit QPSK ...

Page 81: ...t for the carrier frequency error QPSK modulation Parameters FrequencyError Range 0 ppm to 1 ppm RST 0 25 ppm ON Default unit ppm Additional parameters OFF ON disables enables the limit check Example See Specifying Limits Firmware Software V3 0 20 CONFigure LTE MEAS i ENB MEValuation LIMit QPSK IQOFfset Offset Defines an upper limit for the I Q origin offset QPSK modulation Parameters Offset I Q o...

Page 82: ...MEValuation LIMit QAM ModOrder EVMagnitude RMS Peak Defines upper limits for the RMS and peak values of the error vector magnitude EVM for 16 QAM or 64 QAM Suffix ModOrder 16 64 16 QAM or 64 QAM Parameters RMS Range 0 to 100 RST 13 5 16 QAM 9 64 QAM ON Default unit Additional parameters OFF ON disables enables the limit check Peak Range 0 to 100 RST 25 16 QAM 15 64 QAM OFF Default unit Additional ...

Page 83: ...limit check fails if the absolute value of the measured phase error exceeds the specified values Suffix ModOrder 16 64 16 QAM or 64 QAM Parameters RMS Range 0 deg to 180 deg RST 13 5 deg 16 QAM 9 deg 64 QAM OFF Default unit deg Additional parameters OFF ON disables enables the limit check Peak Range 0 deg to 180 deg RST 25 deg 16 QAM 15 deg 64 QAM OFF Default unit deg Additional parameters OFF ON ...

Page 84: ...ing Limits Firmware Software V3 0 20 6 3 9 Limits Spectrum The following commands define limits for the Adjacent Channel Leakage Power Ratio ACLR and the spectrum emission mask CONFigure LTE MEAS i ENB MEValuation LIMit ACLR UTRA CBANdwidth Band 84 CONFigure LTE MEAS i ENB MEValuation LIMit ACLR EUTRa CBANdwidth Band 85 CONFigure LTE MEAS i ENB MEValuation LIMit SEMask OBWLimit CBANdwidth Band 85 ...

Page 85: ... absolute limits for the ACLR measured in adjacent E UTRA chan nels The settings are defined separately for each channel bandwidth Suffix Band 14 30 50 100 150 200 Channel bandwidth in 0 1 MHz Parameters RelativeLevel Range 256 dB to 256 dB RST 44 2 dB ON Default unit dB Additional parameters OFF ON disables enables the limit check AbsoluteLevel Range 256 dBm MHz to 256 dBm MHz RST 50 dBm MHz ON D...

Page 86: ...idth Band See also chapter 3 7 3 Spectrum Emission Mask on page 20 Suffix Band 14 30 50 100 150 200 Channel bandwidth in 0 1 MHz no 1 10 Number of the emission mask area Parameters Enable OFF ON Disables enables the limit check for the emission mask area RST ON no 1 to 3 OFF no 4 to 10 FrequencyStart Start frequency of the area relative to the edges of the channel bandwidth Range 0 MHz to 35 91 Ba...

Page 87: ...pecifying Limits Firmware Software V3 0 20 Manual operation See Limits on page 46 6 3 10 Signal Configuration Information The following commands return the modulation scheme specified indirectly via the E UTRA test model FETCh LTE MEAS i ENB MEValuation MODulation READ LTE MEAS i ENB MEValuation MODulation Returns the modulation scheme according to the configured E UTRA test model Return values Re...

Page 88: ... Example See Performing Single Shot Measurements Usage Query only Firmware Software V3 0 20 For additional information concerning syntax elements and returned values refer to Conventions and General Information 6 3 12 Magnitude Error Results Traces The following commands return the magnitude error vs OFDM symbol results of the multi evaluation measurement FETCh LTE MEAS i ENB MEValuation MERRor CU...

Page 89: ...n PERRor MAXimum READ LTE MEAS i ENB MEValuation PERRor CURRent READ LTE MEAS i ENB MEValuation PERRor AVERage READ LTE MEAS i ENB MEValuation PERRor MAXimum Returns the values of the phase error bar graphs for the OFDM symbols in the mea sured subframe The results of the current average and maximum bar graphs can be retrieved See also chapter 3 8 2 Detailed Views EVM Magnitude Error Phase Error o...

Page 90: ...ional information concerning syntax elements and returned values refer to Conventions and General Information 6 3 15 Spectrum Emission Results Traces The following commands return the spectrum emission trace results of the multi evalu ation measurement FETCh LTE MEAS i ENB MEValuation TRACe SEMask RBW kHz CURRent FETCh LTE MEAS i ENB MEValuation TRACe SEMask RBW kHz AVERage FETCh LTE MEAS i ENB ME...

Page 91: ...ts n Separation Frequency Range RBW30 4799 15 kHz 35 985 MHz to 35 985 MHz RBW100 1599 45 kHz 35 955 MHz to 35 955 MHz RBW1000 799 90 kHz 35 910 MHz to 35 910 MHz For additional information concerning syntax elements and returned values refer to Conventions and General Information 6 3 16 I Q Constellation Results Traces The following command returns the results in the I Q constellation diagram FET...

Page 92: ...mple See Performing Single Shot Measurements Usage Query only Firmware Software V3 0 20 For additional information concerning syntax elements and returned values refer to Conventions and General Information 6 3 18 ACLR Spectrum Results The following commands return the ACLR spectrum results of the multi evaluation measurement FETCh LTE MEAS i ENB MEValuation TRACe ACLR CURRent 92 FETCh LTE MEAS i ...

Page 93: ... carrier frequency Range 100 dBm to 55 dBm Default unit dBm 6_U128_2neg 7_U128_1neg Power in the second and first adjacent UTRA 1 28 MHz chan nels below the carrier frequency Range 100 dBm to 55 dBm Default unit dBm 8_EUTRA2neg 9_EUTRA1neg Power in the second and first adjacent E UTRA channels below the carrier frequency Range 100 dBm to 55 dBm Default unit dBm 10_EUTRA Power in the assigned E UTR...

Page 94: ...iagram The current and average values can be retrieved See also chapter 3 8 6 Detailed Views Spectrum ACLR on page 29 The values described below are returned by FETCh and READ commands CALCulate commands return limit check results instead one value for each result listed below Return values 1_Reliability Reliability Indicator 2_U768_2neg 3_U768_1neg ACLR for the second and first adjacent UTRA 7 68...

Page 95: ...y Firmware Software V3 0 20 For additional information concerning syntax elements and returned values refer to Conventions and General Information 6 3 19 Modulation Results Single Values The following commands return the statistical modulation results CALCulate LTE MEAS i ENB MEValuation MODulation CURRent 95 CALCulate LTE MEAS i ENB MEValuation MODulation AVERage 95 FETCh LTE MEAS i ENB MEValuati...

Page 96: ...ication of the parameter position within the result array Return values 1_Reliability Reliability Indicator 2_OutOfTol Out of tolerance result i e percentage of measurement inter vals of the statistic count for modulation measurements exceed ing the specified modulation limits Range 0 to 100 Default unit 3_EVM_RMSlow 4_EVM_RMShigh 5_EVMpeakLow 6_EVMpeakHigh Error vector magnitude RMS and peak valu...

Page 97: ...mple See Performing Single Shot Measurements Usage Query only Firmware Software V3 0 20 For additional information concerning syntax elements and returned values refer to Conventions and General Information CALCulate LTE MEAS i ENB MEValuation MODulation EXTReme FETCh LTE MEAS i ENB MEValuation MODulation EXTReme READ LTE MEAS i ENB MEValuation MODulation EXTReme Returns the extreme single value r...

Page 98: ...low 12_PErrRMSh Phase error RMS value for low and high EVM window position Range 0 deg to 180 deg Default unit deg 13_PErrPeakLow 14_PErrPeakHigh Phase error peak value for low and high EVM window position Range 180 deg to 180 deg Default unit deg 15_IQOffset I Q origin offset Range 100 dBc to 0 dBc Default unit dBc 16_FreqError Carrier frequency error Range 80000 Hz to 80000 Hz Default unit Hz 17...

Page 99: ...MEValuation SEMask EXTReme 100 FETCh LTE MEAS i ENB MEValuation SEMask MARGin 101 READ LTE MEAS i ENB MEValuation SEMask MARGin 101 FETCh LTE MEAS i ENB MEValuation SEMask MARGin CURRent NEGativ 102 FETCh LTE MEAS i ENB MEValuation SEMask MARGin CURRent POSitiv 102 FETCh LTE MEAS i ENB MEValuation SEMask MARGin AVERage NEGativ 102 FETCh LTE MEAS i ENB MEValuation SEMask MARGin AVERage POSitiv 102 ...

Page 100: ... limits Range 0 to 100 Default unit OBW Occupied bandwidth Range 0 MHz to 40 MHz Default unit Hz TXpower Total TX power in the subframe Range 100 dBm to 55 dBm Default unit dBm Example See Performing Single Shot Measurements Usage Query only Firmware Software V3 0 20 For additional information concerning syntax elements and returned values refer to Conventions and General Information CALCulate LTE...

Page 101: ...t is exceeded Results are provided for the current average and maximum traces For each trace 20 values related to the negative Neg and positive Pos offset frequencies of emission mask areas 1 to 10 are provided For inactive areas NCAP is returned The number to the left of each result parameter is provided for easy identification of the parameter position within the result array Return values 1_Rel...

Page 102: ...luation SEMask MARGin MINimum NEGativ READ LTE MEAS i ENB MEValuation SEMask MARGin MINimum POSitiv Returns spectrum emission mask margin results A negative margin indicates that the trace is located above the limit line i e the limit is exceeded The individual commands provide results for the CURRent AVERage and maximum traces resulting in MINimum margins For each trace the X and Y values of the ...

Page 103: ...90 02 05 5_MarginX2 6_MarginY2 21_MarginX10 22_MarginY10 X position and Y value of margin for area 2 to 10 Example See Performing Single Shot Measurements Usage Query only Firmware Software V3 0 20 Multi Evaluation Measurement Commands 深圳德标仪器 135 1095 0799 ...

Page 104: ...EAS i ENB MEValuation LIMit QPSK FERRor 81 CONFigure LTE MEAS i ENB MEValuation LIMit QPSK IQOFfset 81 CONFigure LTE MEAS i ENB MEValuation LIMit QPSK MERRor 80 CONFigure LTE MEAS i ENB MEValuation LIMit QPSK PERRor 80 CONFigure LTE MEAS i ENB MEValuation LIMit SEMask LIMit no CBANdwidth Band 86 CONFigure LTE MEAS i ENB MEValuation LIMit SEMask OBWLimit CBANdwidth Band 85 CONFigure LTE MEAS i ENB ...

Page 105: ... ENB MEValuation MODulation SDEViation 96 FETCh LTE MEAS i ENB MEValuation MODulation 87 FETCh LTE MEAS i ENB MEValuation PERRor AVERage 89 FETCh LTE MEAS i ENB MEValuation PERRor CURRent 89 FETCh LTE MEAS i ENB MEValuation PERRor MAXimum 89 FETCh LTE MEAS i ENB MEValuation SEMask AVERage 99 FETCh LTE MEAS i ENB MEValuation SEMask CURRent 99 FETCh LTE MEAS i ENB MEValuation SEMask EXTReme 100 FETC...

Page 106: ...MEAS i ENB MEValuation SEMask MARGin AVERage POSitiv 102 READ LTE MEAS i ENB MEValuation SEMask MARGin CURRent NEGativ 102 READ LTE MEAS i ENB MEValuation SEMask MARGin CURRent POSitiv 102 READ LTE MEAS i ENB MEValuation SEMask MARGin MINimum NEGativ 102 READ LTE MEAS i ENB MEValuation SEMask MARGin MINimum POSitiv 102 READ LTE MEAS i ENB MEValuation SEMask MARGin 101 READ LTE MEAS i ENB MEValuati...

Page 107: ...erence 56 GUI reference 34 limits 18 measurement description 10 programming 51 results 22 M Marker LTE eNodeB Multi Evaluation measurement 32 Meas Filter Emission Mask LTE eNodeB Multi Evaluation measurement 42 Measure on Exception LTE eNodeB Multi Evaluation measurement 38 Mixer Level Offset LTE eNodeB Multi Evaluation measurement 37 P Physical Cell ID LTE eNodeB Multi Evaluation measurement 40 p...

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