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R&S FSH

Setting the Bandwidths

1145.5973.12 4.13

E-14

Video bandwidth

The video bandwidth smoothes the trace by reducing noise. When the filtered IF signal is envelope-
detected, an IF sine signal becomes a DC voltage in the video signal. If the sine signal is amplitude-
modulated, a signal whose frequency is the same as the AM frequency is produced in the video signal
apart from the DC voltage from the carrier. The Fig. below shows an RF signal modulated with a sine
signal and the corresponding video signal in the time domain.

AM RF signal

IF signal

Envelope signal

(video voltage)

DC voltage

from carrier

AC voltage

from modulation

Time

Time

Amplitude

Amplitude

The envelope signal contains a DC component corresponding to the carrier level and an AC component
whose frequency is the same as the AM frequency. If the bandwidth of the video filter is less than the
frequency of the AC component, the latter will be suppressed depending on its maximum frequency. If
the AM component is to be displayed faithfully, the cutoff frequency must be greater than the
modulation frequency.

If there is noise on the sine signal, the modulation signal can be thought of as noise. If the video
bandwidth is reduced, the high-frequency noise components above the cutoff frequency of the video
filter will be rejected. The smaller the video bandwidth, the smaller the noise amplitude at the video filter
output.

Therefore, the following rules of thumb can be applied to setting the video bandwidth:

•

If you are performing measurements on modulated signals, the video bandwidth must be sufficiently
large so that wanted modulation components are not rejected ( RBW).

•

If signals are to be kept free of noise, the smallest video bandwidth possible should be selected
( 0.1 x RBW).

•

If measurements are being performed on pulsed signals, the video bandwidth should be at least
three times greater than the resolution bandwidth so that the pulse edges are not distorted.

Like the resolution bandwidth, the video bandwidth has an effect on sweep speed. The spectrum
analyzer must pause before each measurement to allow the video filter to settle.

The R&S FSH has video bandwidths from 10 Hz to 3 MHz in a 1, 3, 10 sequence. When the default
settings are selected, they are coupled to the resolution bandwidth. The video bandwidth equals the
resolution bandwidth. When the resolution bandwidth is changed, the R&S FSH automatically sets the
appropriate video bandwidth. This means that, in many cases, the video bandwidth does not need to be
set separately. When the resolution bandwidth is changed, the video bandwidth is changed
automatically.

深圳市盛腾仪器仪表有限公司

Tel:0755-83589391

Fax:0755-83539691

Website: www.Sengt.com

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Содержание FSH18

Страница 1: ...Test and Measurement Division Operating Manual Handheld Spectrum Analyzer R S FSH 1145 5850 03 1145 5850 13 1145 5850 23 1145 5850 06 1145 5850 26 1145 5850 18 Tel 0755 83589391 Fax 0755 83539691 Webs...

Страница 2: ...1145 5973 12 14 2 Dear Customer R S is a registered trademark of Rohde Schwarz GmbH Co KG Trade names are trademarks of the owners Tel 0755 83589391 Fax 0755 83539691 Website www Sengt com...

Страница 3: ...r 1 4 Spectrum Analyzer Connectors 1 5 Screen Settings 1 8 Country Specific Settings 1 10 Setting the Date and Time 1 11 Setting the date 1 11 Setting the time 1 11 Charging the Battery 1 12 Selecting...

Страница 4: ...the R S FSH Z44 2 7 Two Port Transmission Measurements 2 9 Measurement of Return Loss 2 11 Performing Distance To Fault Measurements 2 14 Operation in Receiver Mode 2 20 Measuring the Carrier to Nois...

Страница 5: ...nd texts 3 3 Entering units 3 4 Menu Overview 3 5 Frequency entry 3 5 Frequency span 3 5 Level setting 3 5 Bandwidth setting 3 5 Sweep 3 6 Trace setting 3 6 Measurement functions 3 7 Markers 3 10 Save...

Страница 6: ...ay range 4 9 Entering the display unit 4 9 Entering the reference offset 4 10 Entering the input impedance 4 10 Setting the Bandwidths 4 11 Resolution bandwidth 4 11 Video bandwidth 4 13 Setting the S...

Страница 7: ...termine the occupied bandwidth 4 49 Displaying the occupied bandwidth 4 49 Changing the span 4 50 Measuring the Carrier to Noise Ratio 4 51 Determining the reference 4 52 DIGITAL Tx mode 4 52 ANALOG T...

Страница 8: ...the transmission magnitude 4 90 Measuring the transmission phase 4 90 Measuring the electrical length when measuring transmission 4 93 Measuring the group delay when measuring transmission 4 94 Transm...

Страница 9: ...with transducers 4 137 Reference level settings for measurements with transducers 4 137 Frequency range of transducer 4 138 Data sets containing transducer factors 4 138 Field Strength Measurement wit...

Страница 10: ...ature drift 0 C to 30 C 30 C to 50 C 2 ppm in addition 2 ppm 10 C Frequency counter Resolution 1 Hz Frequency span 0 Hz 100 Hz to 3 GHz 0 Hz 100 Hz to 6 GHz 0 Hz 100 Hz to 18 GHz 1145 5850 13 0 Hz 1 k...

Страница 11: ...0 V 80 V 1 50 V Maximum power 20 dBm 30 dBm 1 W for max 3 minutes 20 dBm Intermodulation free dynamic range third order IM products 2 x 20 dBm reference level 10 dBm Carrier offset 2 MHz 60 dB 10 dBm...

Страница 12: ...m 110 dBm typ 118 dBm 5 GHz to 6 GHz 96 dBm typ 102 dBm 110 dBm typ 118 dBm 6 GHz to 8 GHz 108 dBm typ 113 dBm 8 GHz to 12 GHz 105 dBm typ 113 dBm 12 GHz to 16 GHz 100 dBm typ 108 dBm 16 GHz to 18 GHz...

Страница 13: ...18 GHz Receive frequency signal frequency 3 9 GHz signal frequency 0 6 GHz to 1 GHz signal frequency 0 6 GHz to 1 GHz mixer level 20 dBm carrier offset 1MHz signal frequency 10 MHz to 7 6 GHz 7 6 GHz...

Страница 14: ...stalled in addition average and quasi peak Level measurement error at reference level down to 50 dB 20 C to 30 C 1 MHz to 10 MHz 10 MHz to 20 MHz 20 MHz to 6 GHz 6 GHz to 14 GHz 14 GHz to 18 GHz 1 5 d...

Страница 15: ...from 50 10 dBm Outputs AF output 3 5 mm mini jack Output impedance Open circuit voltage 100 adjustable up to 1 5 V Tracking generator only models 145 5850 13 1145 5850 23 und 1145 5850 26 Frequency ra...

Страница 16: ...dBm Measurement range 200 pW to 200 mW 67 dBm to 23 dBm Signal weighting average power Effect of harmonics Effect of modulation 0 5 0 02 dB at harmonic ratio of 20 dB 1 5 0 07 dB for continuous digita...

Страница 17: ...erage power 30 mW to 300 W 30 mW to 300 W CF Measurement uncertainty 25 MHz to 40 MHz 40 MHz to 1 GHz sine signal 18 C to 28 C no zero offset 4 0 of measured value 0 17 dB 3 2 of measured value 0 14 d...

Страница 18: ...100 s 20 s repetition rate 100 s 0 001 duty cycle 0 1 video bandwidth 4 kHz 200 kHz 600 kHz 3 of measured value 0 05 W starting from a burst width of 200 Is 3 of measured value 0 20 W starting from a...

Страница 19: ...73 12 TI 10 E 14 Directional Power Sensor R S FSH Z14 Error limits for matching measurements Power handling capacity Dimensions 120 mm x 95 mm x 39 mm connecting cable 1 5 m Weight 0 65 kg Tel 0755 83...

Страница 20: ...ss 200 MHz to 1 5 GHz 1 5 GHz to 4 GHz 0 06 dB 0 09 dB Directivity 200 MHz to 3 GHz 3 GHz to 4 GHz 30 dB 26 dB Average power Power measurement range CW FM PM FSK GMSK 3GPP W CDMA cdmaOne cdma2000 DAB...

Страница 21: ...0 dB 3 of measured value 0 13 dB 2 of measured value 0 09 dB 2 of measured value 0 09 dB 0 5 of measured value 0 02 dB 1 of measured value 0 04 dB 2 of measured value 0 09 dB 2 of measured value 0 09...

Страница 22: ...7 of measured value 0 40 W starting from a burst width of 1 Is plus 1 6 of measured value 0 15 W plus 0 10 W plus 5 of measured value plus 10 of measured value Range of typical measure ment error of...

Страница 23: ...to 3 GHz 3 GHz to 4 GHz 4 2 0 2 4 6 Measurement error dB Power handling capacity PEAK max 10 ms SWR 3 AVG 10 C to 35 C SWR 1 5 Forward power Frequency 0 2 0 4 0 7 1 2 3 4 GHz 100 200 400 600 800 1000...

Страница 24: ...p 28 dB 16 dB typ 25 dB Directivity corrected 2 MHz to 10 MHz 10 MHz to 3 GHz 3 GHz to 6 GHz option R S FSH K2 typ 40 dB typ 43 dB typ 40 dB typ 40 dB typ 37 dB Return loss at test port 10 MHz to 50 M...

Страница 25: ...ol interface 7 contact connector type Binder General data Power consumption 3 mW nominal Dimensions W x H x D 169 mm x 116 mm x 30 mm 149 mm x 144 mm x 45 mm Weight 485 g 620 g Calibration standards R...

Страница 26: ...loss 0 m to max 1000 m Maximum permissible spurious signal 1st mixer 1 dB compression point typ 10 dBm IF overload at reference level typ 8 dB Specification Condition R S FSH3 R S FSH6 Transmission m...

Страница 27: ...y range 1 to 2 1 to 6 1 to 10 und 1 to 20 selectable with option R S FSH K2 also 1 to 1 2 and 1 to 1 5 Display range Reflection coefficient mRho 0 to 1 0 to 0 1 0 to 0 01 0 to 0 001 0 to 100 0 to 100...

Страница 28: ...R S FSH3 models 1145 5850 13 or 1145 5850 23 R S FSH6 1145 5850 26 and R S FSH K2 Frequency range Reflection Transmission with R S FSH Z2 Z3 10 MHz to 3 GHz 5 MHz to 3 GHz 10 MHz to 6 GHz 5 MHz to 6 G...

Страница 29: ...tal 20 dBm PREF_LEV 30dB Ptotal PREF_LEV 3dB 1 5 dB typ 0 5 dB CPICH power S N 30 dB test case 6 2 2 in accordance with 3GPP 25 141 Measurement range 40 dBm Ptotal 20 dBm Ptotal 20 dB PCPICH Ptotal Me...

Страница 30: ...ime 24 s CPICH EC I0 18 dB 2 Multiple scrambling code detection Max number of scrambling codes 8 Calculation time 57 s CPICH EC I0 21 dB 2 CPICH power Measurement uncertainty 40 dBm Ptotal 20 dBm 4 2...

Страница 31: ...t 40 C IEC60068 IP class of protection 51 Mechanical resistance Vibration sinusoidal complies with EN 60068 2 1 EN61010 1 5 Hz to 55 Hz max 2 g 55 Hz to 150 Hz 0 5 g constant 12 minutes per axis Vibra...

Страница 32: ...with EN 61010 1 UL 3111 1 CSA C22 2 No 1010 1 Test mark VDE GS CSA CSA NRTL Dimensions W x H x D 170 mm x 120 mm x 270 mm Weight 2 5 kg Order No Handheld Spectrum Analyzer R S FSH3 100 kHz to 3 GHz w...

Страница 33: ...ion Measurements for the R S FSH R S FSH K2 1157 3387 02 Receiver Mode for the R S FSH R S FSH K3 1157 3429 02 3GPP FDD Code Domain Power BTS Node B Measurement for the R S FSH3 model 23 as of serial...

Страница 34: ...allel Converter for the R S FSH R S FSH Z22 1145 5880 02 Carrying Bag for the R S FSH R S FSH Z25 1145 5896 02 Transit Case for the R S FSH R S FSH Z26 1300 7627 00 Spare Combined Short Open and 50 Lo...

Страница 35: ...R S FSH Z35 1145 5821 02 Spare Headphones R S FSH Z36 1145 5838 02 Spare USB Optical Cable R S FSH Z37 1300 7733 02 Active Directional Antenna R S HE 200 4050 3509 02 Portable EMF Measurement System 3...

Страница 36: ...d laboratory environments or in the field and must not be used in any way that may cause personal injury or property damage You are responsible if the product is used for an intention other than its d...

Страница 37: ...and thus contribute to personal injury or material damage Basic safety instructions 1 The product may be operated only under the operating conditions and in the positions specified by the manufacturer...

Страница 38: ...earthing contact and protective earth connection 10 Intentionally breaking the protective earth connection either in the feed line or in the product itself is not permitted Doing so can result in the...

Страница 39: ...perly replaced this can cause an explosion warning lithium cells Replace the battery or storage battery only with the matching Rohde Schwarz type see spare parts list Batteries and storage batteries m...

Страница 40: ...product that is manufactured using the most modern methods available This product was developed manufactured and tested in compliance with our quality manage ment system standards The Rohde Schwarz q...

Страница 41: ...complies with the provisions of the Directive of the Council of the European Union on the approximation of the laws of the Member States relating to electrical equipment for use within defined voltag...

Страница 42: ...see below Feedback We want to know if we are meeting your support needs If you have any comments please email us and let us know CustomerSupport Feedback rohde schwarz com USA Canada Monday to Friday...

Страница 43: ...1147 K ln GEDIS GmbH Sophienblatt 100 D 24114 Kiel HAMEG Instruments GmbH Industriestra e 6 D 63533 Mainhausen Locations Worldwide Please refer to our homepage www rohde schwarz com Sales Locations Se...

Страница 44: ...ce Connector for AC power supply Softkeys Function keys Entry keys Cursor keys Unit keys Generator output N connector RF input N connector Connector for headphones Softkey labels On off button Alphanu...

Страница 45: ...wo shells are held together by tape The packaging contains all accessories supplied Undo the tape to unpack the analyzer Upper shell Lower shell CD ROM Headphones Quick Start manual RS 232 C cable Pow...

Страница 46: ...or the display For use as a desktop fold out the support at the rear so that the instrument can easily be operated from the front and the display can be read easily see Fig For on site installation an...

Страница 47: ...power outlet attach the appropriate adapter In vehicles the battery can be charged from the cigarette lighter socket using the R S FSH Z21 cable Caution It is strictly forbidden to operate the R S FS...

Страница 48: ...ment or a 10 MHz reference signal is applied for frequency synchronization The trigger threshold is similar to that of TTL signals The level for the reference signal must be greater than 10 dBm Switch...

Страница 49: ...v II is used a connection with the R S FSH cannot be set up as long as the Hyper Threading function is active To use the USB cable you must first disable the HT function You can do this as follows Go...

Страница 50: ...via an N connector The nominal output level is 20 dBm 100 LW With the R S FSH3 model 1145 5850 23 the level can be switched between 20 dBm and 0 dBm 1 mW Up to 3 GHz the R S FSH6 model 1145 5850 26 su...

Страница 51: ...DISPLAY softkey or the ENTER key again The BACKLIGHT submenu for the lighting level opens The level can be set to HIGH NORMAL and LOW Using the rotary knob or cursor keys select the setting you want a...

Страница 52: ...or settings opens Using the rotary knob or cursor keys select TYPE and confirm with the ENTER key or by pressing the DISPLAY softkey again In the submenu that opens select COLOR or BLACK WHITE Confirm...

Страница 53: ...elected language is highlighted in red Using the rotary knob or cursor keys select the language you want The originally selected language is highlighted in green The red bar indicates the new selectio...

Страница 54: ...te day or month depending on the date format Proceed with the next two fields as with the first After the last data block has been entered the R S FSH verifies the validity of the entered date If the...

Страница 55: ...the battery is flat Battery charge level symbol The battery is charged via the included power supply unit which is connected to the jack on the right hand side of the carrying handle If required equi...

Страница 56: ...ays to deviate from the default setup for a specific application it is also possible to select a user defined default setup which is then automatically set with the PRESET key This is useful for examp...

Страница 57: ...table Data set overwritable Status field External Reference External Trigger Switchover The Ext Trig Ext Ref BNC connector on top of the R S FSH can be used either as an input for an external trigger...

Страница 58: ...W NOISE or LOW DISTORTION Confirm with the ENTER key or the HARDWARE SETUP softkey Using a Preamplifier Only models 1145 5850 03 1145 5850 23 1145 5850 06 and 1145 5850 26 The R S FSH models 1145 5850...

Страница 59: ...ier ON Reference level RF attenuation RF attenuation Preamplifier Low Noise Low Distortion Low Noise Low Distortion 25 dBm 0 dB 0 dB 0 dB 0 dB On 24 dBm to 20 dBm 0 dB 0 dB 10 dB 10 dB On 19 dBm to 15...

Страница 60: ...PIN the PIN functions can be selected from the selection box When the R S FSH is delivered a new PIN can be activated only if it differs from the factory set PIN Note Before you activate the PIN mode...

Страница 61: ...PIN Code protected If the instrument is protected with a PIN affix one of these labels to the instrument This warns unauthorized users that they cannot operate the R S FSH Deactivating PIN protection...

Страница 62: ...R S FSH using the Serial Parallel Converter R S FSH Z22 thus freeing up the Centronics parallel interface to connect a printer The R S FSH Z22 is powered by a 9 V alkaline battery NEDA IEC6LR61 Fold o...

Страница 63: ...ou want and confirm with the ENTER key or by pressing the GENERAL softkey again The R S FSH displays the selected printer under Printer Type Next set the baud rate for the selected printer Press the G...

Страница 64: ...FSH displays the selected baud rate under SERIAL BAUDRATE in the setup display Enabling Options The R S FSH can be fitted with options e g distance to fault measurements on cables which are enabled by...

Страница 65: ...displays the installed options in the Setup menu so you can check them Press the SETUP key Using the rotary knob or the cursor keys scroll the status display downwards The R S FSH displays all availa...

Страница 66: ...g the Signal Generator R S SML Measurement setup Connect the RF output of the signal generator to the RF input of the R S FSH Signal generator settings Frequency 100 MHz Level 30 dBm Level measuremen...

Страница 67: ...top of the measurement diagram is called the reference level REF LEVEL To obtain the best dynamic range from a spectrum analyzer its full level range should be used This means that the maximum spectru...

Страница 68: ...point frequency and the center frequency and frequency span that have been set The measurement point resolution and consequently the accuracy of the marker frequency readout therefore depend on the f...

Страница 69: ...that are multiples of 100 MHz To measure the second harmonic ratio set the start and stop frequency as follows Press the FREQ key The softkey menu opens entering the frequency Press the START softkey...

Страница 70: ...for the sensor is never exceeded when measurements are made on high power transmitters Connect the power sensor cable to the R S FSH s power sensor connector and screw it into position Press the MEAS...

Страница 71: ...power sensor please wait When zeroing is over the R S FSH outputs the message Power Sensor Zero OK and switches back to the softkey menu for the power sensor Connect the signal under test The R S FSH...

Страница 72: ...r sensor must be connected and screw fastened to the power sensor connector on the R S FSH The directional power sensor itself has to be inserted between the source and the load Directional Power Sens...

Страница 73: ...ancel zeroing before it begins e g if the signal source cannot be disconnected The R S FSH immediately starts power sensor zeroing While this is being done the R S FSH outputs the message Zeroing powe...

Страница 74: ...at tracking generator measurements are uncalibrated Before calibration the span you want should be set because calibration is valid only for the calibrated span Changing the frequency settings after c...

Страница 75: ...on You can read out values with the markers for example The transmission calibration remains valid until the center frequency or the span is changed on the R S FSH such that the new span falls outside...

Страница 76: ...e point were the reflection measurement is to be made If a cable is to be inserted between the DUT and the bridge perform the calibration at the measurement end of the cable Press the MEAS key Press t...

Страница 77: ...Z2 open Using the CONTINUE softkey start the OPEN cali bration While calibration is in progress the R S FSH outputs the message Calibrating OPEN please wait When OPEN calibration is over the R S FSH...

Страница 78: ...ns the calibration data but places a red dot in front of the FSH Z2 Refl display to indicate a possible increase in measurement uncertainty When saving a data set for a scalar reflection measurement i...

Страница 79: ...RF input and generator output of the R S FSH Connect the 1 m test cable supplied with option R S FSH B1 to the bridge test port Note The 1 m cable must be used Results are invalid without this cable...

Страница 80: ...asurement in the upper right hand corner of the screen Entering the cable parameters at a specific frequency If cables are used that are not listed in cable models stored in the R S FSH it is possible...

Страница 81: ...ngth in meters and terminate the entry with the ENTER key or one of the unit keys or Using the rotary knob 1 m steps or the cursor keys 10 m steps adjust the cable length If the unit of length is set...

Страница 82: ...oss produced in the cable under test versus the distance The R S FSH can also list any cable faults It displays the return loss and distance from the measurement plane of all reflections that exceed a...

Страница 83: ...h the ENTER key The entry field for the zoom factor is displayed while the R S FSH simultaneously expands the x axis by a factor of 2 Using the rotary knob or the cursor keys set the zoom factor to th...

Страница 84: ...ternal interferers Press the MEAS MODE softkey Using the rotary knob or cursor keys select SPECTRUM Confirm by pressing the MEAS MODE softkey again or by pressing the ENTER key The R S FSH turns off t...

Страница 85: ...or the cursor keys select RECEIVER from the menu and confirm with the ENTER key or the MEASURE softkey The R S FSH activates the receiver mode and measures the level at the specified frequency The mo...

Страница 86: ...channels The channel tables that the R S FSH uses to set channel frequencies are defined either by using the R S FSH View software or by directly entering the first channel number the associated freq...

Страница 87: ...NELS from the menu and confirm with the ENTER key Enter the number of channels and confirm with the ENTER key Press the DEFINE USER TAB softkey Using the rotary knob or the cursor keys select CHANNEL...

Страница 88: ...t on the set frequency Setting the detector The receiver mode of the R S FSH offers a peak detector average detector RMS detector and quasi peak detector Set the detector either from the main menu of...

Страница 89: ...plays the measurement levels at the individual frequencies as vertical lines Press the SCAN START softkey Enter the start frequency for the scan Press the SCAN STOP softkey Enter the stop frequency fo...

Страница 90: ...ured This is common with amplitude modulated TV signals CW Tx In the CW Tx operating mode the power of an unmodulated carrier is measured Manual entry of a reference power or a reference level You can...

Страница 91: ...th of the reference channel If the reference measurement is active press the CHANNEL BW softkey Enter the desired value and terminate the entry with the appropriate unit key The R S FSH sets the span...

Страница 92: ...the CHANNEL BW softkey Enter the desired value and terminate the entry with the appropriate unit key The R S FSH sets the span in accordance with the selected bandwidth The channel center frequency i...

Страница 93: ...list of names of the data sets already stored and display them with the first available free extension Thus the name of the data set recalled for a specific measurement can be selected for storing the...

Страница 94: ...23 from serial number 102314 you can now also save the calibration data for the vector measurement of the transmission or of the reflection In the default state calibration data storage is disabled Pr...

Страница 95: ...a set are displayed You now have the following options Press the STATUS key to see all the instrument settings in the selected data set When you press the STATUS key again the R S FSH returns to the g...

Страница 96: ...ailable Printer with serial interface Connect the printer to the optical interface using the RS 232 C optical interface cable R S FSH Z34 Printer with parallel interface Connect the RS 232 C optical i...

Страница 97: ...ing Battery charge level indicator X axis scale Level axis scale Reference level display Detector display Value entry box Status message Invalid trace symbol Grid Display of resolution bandwidth RBW v...

Страница 98: ...labelling and its background indicate the status of the softkey function in question Softkey colour Meaning Blue background white labelling Softkey function is turned off Blue background grey labelli...

Страница 99: ...assigns the letters above the keys to the keys in the alphanumeric keypad The keys have multiple assignments The letter you want is obtained by pressing the key the appropriate number of times The ke...

Страница 100: ...key Use the unit keys down the right hand side of the alphanumeric keypad These keys have multiple assignments which depend on the unit entry expected by the R S FSH GHz dBm V s MHz dBm dBmV mV ms kH...

Страница 101: ...MPT REF RANGE UNIT REF OFFSET RF INPUT 10 dB DIV 5 dB DIV 2 dB DIV 1 dB DIV 0 1 dB DIV LIN 0 100 VSWR 1 REFL COEFF ROH 1 REFL COEFF mROH 1 SMITH CHART 1 2 dBm dBmV dBHV V W 50 75 1 Only available with...

Страница 102: ...O EXTERN EXTERN DELAY Trace setting TRACE TRACE MODE TRACE MEMORY SHOW MEMORY DETECTOR AUTO COUPLED AUTO PEAK MIN PEAK MAX PEAK SAMPLE RMS CLEAR WRITE AVERAGE MIN HOLD MAX HOLD VIEW ZOOM MOVE X MOVE Y...

Страница 103: ...ST PRINTER EXIT MANUAL SWPTIME Option FSH K2 only STANDARD LEVEL ADJUST PWR UNIT CHANNEL BW POWER DISPLAY USER 3GPP WCDMA CDMAONE CDMA2000 1x Rename USER dBm dBmV dB V 1145 5850 23 1145 5850 26 only U...

Страница 104: ...5973 12 3 8 E 14 Power meter menus Transducer menus MEASURE MEAS TRANS DUCER LIMIT LINES DISPLAY LINE TRANSD TRANSD dB EXIT TRD S OFF SELECT TRANSD OFF EXIT LIST PRINTER Tel 0755 83589391 Fax 0755 835...

Страница 105: ...XIT LIMITS OFF OPTIONS SELECT LIMIT OFF EXIT LIST PRINTER MEASURE MEAS TRANS DUCER LIMIT LINES DISPLAY LINE BEEP MESSAGE VSWR LIMIT EXIT OPTIONS BEEP MESSAGE Smith Chart Option FSH K2 Menus for measur...

Страница 106: ...ELTA 6 ALL DELTAS ON ALL DELTAS OFF TG mode Smith chart switched on option R S FSH K2 MARKER MARKER DELTA MARKER SET MARKER MARKER MODE MKR LIST VIEW MARKER FORMAT IMPEDANCE MARKER 1 MARKER 2 MARKER 3...

Страница 107: ...ER MARKER OFFSET SET MARKER MARKER MODE MKR LIST VIEW D1 PEAK D1 NEXT PEAK D1 MINIMUM CENTER MRK FREQ REF LVL MRK LVL ALL MKR TO PEAK NORMAL NOISE FREQ COUNT MULTI MARKER ZOOM ON ZOOM OFF MARKER 1 MAR...

Страница 108: ...NTER BAUDRATE 1200 Baud 2400 Baud 9600 Baud 19200 Baud 38400 Baud 57600 Baud 115200 Baud PRINTER DESKJET LASERJET EPSON FX POSTSCRIPT PINCODE PINCODE OFF PINCODE ON NEW PINCODE DATE FORMAT dd mm yyyy...

Страница 109: ...IVER TRACKING GEN POWER SENSOR CHANNEL POWER OCCUPIED BW TDMA POWER DISTANCE TO FAULT FREQ REF LEVEL BAND WIDTH MEAS TIME DETECTOR FREQ key Frequency entry FREQ FREQ FREQ STEPSIZE FREQ MODE CHANNEL MO...

Страница 110: ...annel entry SPAN FIXED CHANNEL CHANNEL SCAN FREQ START FREQ STOP Channel scan SPAN FIXED CHANNEL CHANNEL SCAN FREQ START FREQ STOP AMPT key AMPT REF RANGE UNIT REF OFFSET RF INPUT dBm dBmV dBHV V W 50...

Страница 111: ...RN DELAY Trace key Measurement at a fixed frequency TRACE TRACE MODE TRACE MEMORY SHOW MEMORY DETECTOR TRACE STYLE PEAK AVERAGE RMS QUASI PEAK Scan mode TRACE TRACE MODE TRACE MEMORY SHOW MEMORY DETEC...

Страница 112: ...Menus in the Receiver Mode Option R S FSH K3 R S FSH 1145 5973 12 3 16 E 14 Menu for 3GPP BTS Code Domain Power Measurement Option R S FSH K4 Tel 0755 83589391 Fax 0755 83539691 Website www Sengt com...

Страница 113: ...y to a printer as measurement documentation At a later date every detail of a measurement can therefore be accurately reproduced Operating sequence Press the STATUS key above and to the right of the r...

Страница 114: ...he new center frequency The value entry box remains open for any further entries As an alternative you can change the center frequency with the rotary knob or the cursor keys and terminate the entry w...

Страница 115: ...e softkey label opens The box contains various step size setting options With 0 1 x SPAN default setting the step size is equal to 10 of the span 1 division on the vertical scale With CENTER the step...

Страница 116: ...reach the 3 GHz limit with the rotary knob or the cursor keys the R S FSH3 outputs the message Maximum reached The limit on the R S FSH6 is 6 GHz and on the R S FSH18 18 GHz Working with channel tabl...

Страница 117: ...table used either Minimum reached is displayed on the screen when the lowest channel number is reached or Maximum reached is displayed when the highest channel number is reached All other measurement...

Страница 118: ...knob or the cursor keys The span is set immediately after the change is made The value entry box can be cleared from the screen with the CANCEL key Use the FULL SPAN softkey to select the full span f...

Страница 119: ...e preamplifier if switched on is coupled to the reference level setting Preamplifier OFF Preamplifier ON Reference level RF attenuation RF attenuation Preamplifier Low Noise Low Distortion Low Noise L...

Страница 120: ...H Z38 can be taken into account by using a transducer factor included with the R S FSH View control software Setting the reference level Press the AMPT key The reference level entry is activated immed...

Страница 121: ...is fitted with a tracking generator which is configured for reflection measurements The SMITH CHART menu option is available only if option R S FSH K2 has been installed and a reflection measurement h...

Страница 122: ...s used for the reference level To indicate that a non zero reference offset has been set a red circle is placed before the reference level readout Entering the input impedance Press the AMPT key Press...

Страница 123: ...d by the spectrum analyzer If the bandwidth is small the noise displayed drops If the bandwidth is reduced or increased by a factor of 3 the noise displayed drops or goes up by 5 dB If the bandwidth i...

Страница 124: ...th you want using the number keys and terminate the entry with the appropriate unit MHz kHz or Hz or Change the resolution bandwidth to the value you want using the rotary knob or the cursor keys Reso...

Страница 125: ...omponents above the cutoff frequency of the video filter will be rejected The smaller the video bandwidth the smaller the noise amplitude at the video filter output Therefore the following rules of th...

Страница 126: ...small red circle is placed before the video bandwidth readout in the upper right hand corner of the screen Enter the video bandwidth you want with the number keys and terminate the entry with the appr...

Страница 127: ...hand side of the measurement diagram The R S FSH requires a minimum sweep time of 20 ms per 600 MHz of span If a larger span is set the R S FSH automatically adapts the minimum sweep time in the coup...

Страница 128: ...S FSH now sweeps continuously again Trigger To respond to events the R S FSH has a variety of trigger functions The trigger can either be external or generated internally FREE RUN A new sweep starts...

Страница 129: ...means that the trigger level equals the reference level 50 that the trigger level is in the middle of the y axis on the measurement diagram default setting The position of the video trigger on the lev...

Страница 130: ...ution depends on the delay selected The table below lists the values Trigger delay DELAY Resolution 0 to 1 ms 10 Os 1 ms to 10 ms 100 Os 10 ms to 100 ms 1 ms 100 ms to 1 s 10 ms 1 s to 10 s 100 ms 10...

Страница 131: ...previous setting for example if the span is changed Intermittent signals in the spectrum or the maximum of fluctuating signals are easy to find with MAX HOLD MIN HOLD The trace indicates the minimum...

Страница 132: ...a spectrum analyzer s video voltage before it is displayed The detector is pixel oriented i e it determines how the level at each pixel will be displayed The R S FSH always measures the whole spectru...

Страница 133: ...e sweep time as the measurement time for the power pixel increases the greater the sweep time If you are making noise measurements for example the trace will be highly stable if a long sweep time is s...

Страница 134: ...softkey The R S FSH indicates the detector that has been selected in the top left hand corner of the screen Detect Auto Pk in Fig above If AUTO COUPLED is switched on and a detector that does not acc...

Страница 135: ...fference Operation Press the TRACE key Press the TRACE MEMORY softkey The R S FSH transfers the currently displayed trace to the trace memory Press the SHOW MEMORY softkey The R S FSH displays the sav...

Страница 136: ...ds the delta marker frequency is the frequency difference between the frequency at the point marked by the main marker and the frequency at the point marked by the delta marker Marker menu Delta marke...

Страница 137: ...n places the marker or the delta marker on the highest value of the trace The function acts on the active marker whose associated softkey labelling is highlighted in red NEXT PEAK Relative to their cu...

Страница 138: ...ET MARKER softkey or the ENTER key The R S FSH opens a submenu for setting the start and stop frequencies for the marker search range For entering the start of the search range select the START SEARCH...

Страница 139: ...as the multimarker function Up to six different markers are available in the multimarker mode Marker 1 measures in absolute units Markers 2 to 6 can measure in absolute units marker as well as relativ...

Страница 140: ...ar the position you want The step width here is 10 of the X axis Then use the rotary knob to fine tune the marker or delta marker to the signal The step width corresponds to the pixel spacing of the t...

Страница 141: ...R LIST VIEW softkey again or any other softkey in the marker menu the R S FSH closes the marker table Deactivating markers In multimarker mode markers can be deactivated one at a time or all at once D...

Страница 142: ...normal marker mode Alternatively you can exit the multimarker mode by deactivating all markers MARKER key MARKER softkey ALL MARKERS OFF menu item or with PRESET Marker functions Apart from displayin...

Страница 143: ...ixels corresponding to 301 frequency coordinates The frequency resolution is therefore relatively coarse especially if a large span is set To circumvent this problem the R S FSH s internal frequency c...

Страница 144: ...d positions it on the trace maximum Using the cursor keys or the rotary knob select the demodulation mode AM or FM you want and confirm your selection with the ENTER key Note When the AF demodulation...

Страница 145: ...e ENTER key The softkey label DISPLAY LINE is printed on a green background and the entry box is cleared In contrast to the markers the position of the displayed line is pixel oriented The line resolu...

Страница 146: ...ll in comparison with the channel bandwidth The measured values on the trace are then integrated to give the total power The R S FSH takes into account the selected display mode absolute or relative t...

Страница 147: ...the cursor keys Confirm your selection with the ENTER key or the STANDARD softkey The R S FSH sets the selected standard The optimal span resolution bandwidth video bandwidth sweep time and detector f...

Страница 148: ...can be assigned a user defined name Thus the setting used by the R S FSH in the USER setting is immediately clear The name entered as the USER standard also appears on the screen thus making it possi...

Страница 149: ...ram To prevent the R S FSH from being overdriven the signal can be measured at the largest resolution bandwidth possible using the peak detector If this setting is selected it is not possible for the...

Страница 150: ...and output the message Out of range With the R S FSH3 model 1145 5850 23 and with the R S FSH6 R S FSH18 the minimum channel bandwidth is 833 Hz at a span of 1 kHz Changing the span The span set by t...

Страница 151: ...switch from Power to Max Power To deactivate the Max Hold function press the POWER DISPLAY softkey Select CLR WRITE by using the cursor keys or the rotary knob and confirm with the ENTER key The powe...

Страница 152: ...tput The basic unit is dBm Press the PWR UNIT softkey The R S FSH opens the submenu with the units dBm dBmV and dBOV Using the rotary knob or the cursor keys select the required unit Confirm your sele...

Страница 153: ...ected resolution bandwidth If the resolution bandwidth is too narrow the displayed power will be lower than the actual power Press the MEAS key Press the MEASURE softkey The measurement function menu...

Страница 154: ...n thus making it possible to document the setting along with the measurement Press the STANDARD softkey A table with the available standards opens Select Rename USER with the rotary knob or the cursor...

Страница 155: ...ic range for burst signals the lowest reference level possible must be set If this is not done the R S FSH will be overdriven by the measurement signal if its maximum level exceeds the maximum referen...

Страница 156: ...gger on the rising edge of the burst Should this not be the case the trigger level must be adjusted so that the R S FSH is triggered by the burst edge Otherwise no measurement will be performed If the...

Страница 157: ...dwidth After the channel bandwidth has been entered the R S FSH automatically selects the measurement parameters so that an optimal result is attained Operation Press the MEAS key Press the MEASURE so...

Страница 158: ...t is again available when USER is called again The following should be noted when changes to the settings are made The span is always coupled to the channel bandwidth CHANNEL BW When changes are made...

Страница 159: ...he USER standard is selected Using the R S FSH View control software additional standards can be generated and permanently loaded into the R S FSH You can also delete the factory set standards provide...

Страница 160: ...Press the CHAN BW softkey An entry box showing the current channel bandwidth setting opens Using the numeric keys enter a new channel bandwidth and terminate the entry with the appropriate unit or Cha...

Страница 161: ...lue using the numeric keys and confirm the entry with the ENTER key or the PWR BW softkey The R S FSH will now display the occupied bandwidth of the specified percent of the total power Displaying the...

Страница 162: ...SPAN entry is active for immediate entry of another span Using the numeric keys enter a new span and terminate the entry with the appropriate unit or Change the span with the rotary knob or the cursor...

Страница 163: ...dulated TV signals CW Tx In the CW Tx operating mode the power of an unmodulated carrier is measured Manual entry of a reference power or reference level The R S FSH also allows you to manually enter...

Страница 164: ...to 1 2 times the reference channel bandwidth The span is always coupled to the channel bandwidth When changes are made the R S FSH automatically sets the appropriate span The resolution bandwidth shou...

Страница 165: ...ts the measurement result Press the SELECT MEASURE softkey The menu for selecting the reference measurement opens Using the rotary knob or the cursor keys select ANALOG TV and confirm your choice with...

Страница 166: ...nce with the last CW Tx reference measurement In the CW Tx operating mode the count marker is automatically activated After each sweep the marker is set to the highest power in the reference channel M...

Страница 167: ...as been activated the NOISE MEASURE softkey is highlighted in green If DIGITAL Tx is set the R S FSH measures the power in accordance with the selected channel bandwidth Measurement is performed selec...

Страница 168: ...the reference level make sure that the R S FSH is not overdriven Since the power is measured with a resolution bandwidth that is small in comparison with the signal bandwidth the R S FSH may be overdr...

Страница 169: ...ts of the C N reference The R S FSH displays the C N reference as a level in dBm dBOV or dBmV The C N reference is manually entered in accordance with the selected unit Press the LEVEL softkey Using t...

Страница 170: ...lt is stable If the sweep time is extended the R S FSH also increases the integration time for the RMS detector thus yielding measured values that are more stable Press the NOISE MEASURE softkey to st...

Страница 171: ...45 5850 13 If you attempt to enter a smaller channel bandwidth the R S FSH will automatically set 8 33 kHz and output the message Limit exceeded With the R S FSH3 model 1145 5850 23 the R S FSH6 and t...

Страница 172: ...surement result display If the noise channel measurement is active the R S FSH inserts the C N measurement result at the bottom of the measurement diagram Usually this does not obscure the trace Howev...

Страница 173: ...r measurement is set MANUAL SPAN is activated to allow immediate entry of another span Using the numeric keys enter a new span and terminate the entry with the appropriate unit or Change the span with...

Страница 174: ...encies using the selected measurement time per frequency Activating the receiver mode Press the MEAS key Press the MEASURE softkey The measurement function menu will open Use the rotary knob or the cu...

Страница 175: ...enter a new receiving frequency via the numeric keypad The frequency is displayed immediately after the entry Setting the frequency step size The step size for tuning the frequency with the rotary kno...

Страница 176: ...nt that were loaded with the R S FSH View software are displayed If no channel table is loaded No bands available is displayed Select the desired channel table using the rotary knob or the cursor keys...

Страница 177: ...with the ENTER key Enter the number of channels and confirm the entry with the ENTER key Press the DEFINE USER TAB softkey Select CHANNEL SPACING from the menu and confirm with the ENTER key Enter th...

Страница 178: ...the resolution bandwidth the MANUAL RES BW softkey is highlighted in red Change the current bandwidth with the cursor keys or the rotary knob or enter a new bandwidth via the numeric keypad and termin...

Страница 179: ...uation for the C D band 30 MHz to 1000 MHz is coupled to the 120 kHz bandwidth The detector is selected either in the main menu of the receiver mode or by using the TRACE key Press the DETECTOR softke...

Страница 180: ...keypad or change the start frequency using the rotary knob or the cursor keys Press the STOP SCAN softkey Enter the stop frequency of the scan via the numeric keypad or change the start frequency usin...

Страница 181: ...f channel tables The screenshot above shows a measurement using a channel table with frequency gaps Different segments that are not interconnected are specified using the table defined with R S FSH Vi...

Страница 182: ...osition The DUT is connected to the N connector on the power sensor Power Sensor R S FSH Z1 or R S FSH Z18 RF Connector Power Sensor Connector The continuous power applied to the power sensor s input...

Страница 183: ...ng error messages Message Cause Remedy Error in zeroing signal at sensor A signal was present at the power sensor when zeroing was performed Unscrew the power sensor from the device under test and rep...

Страница 184: ...on another known signal the power sensor can be told what the center frequency is via the frequency entry mode FREQ softkey Press the FREQ softkey The frequency value entry box opens Using the number...

Страница 185: ...zero OK and switches back to the softkey menu for the power sensor Selecting the unit for the power readout The R S FSH can display measured power in relative units dBm or in absolute units in Watts...

Страница 186: ...roduce a stabile accurate result In this case the FAST operating mode is recommended to obtain a high repetition rate for the measurement When the NORMAL setting is selected the stability of the displ...

Страница 187: ...box for the reference offset opens Using the rotary knob the cursor keys or the number keys enter the offset you want and confirm the entry with the ENTER key The offset is displayed centrally at the...

Страница 188: ...of forward power The directional power sensors are controlled and powered via a special serial interface The sensor cable is to be connected and screwed to the POWER SENSOR connector on the R S FSH T...

Страница 189: ...conds displays the type of the sensor connected R S FSH Z44 as well as the measured power In the event of incorrect operation or sensor malfunction the R S FSH outputs the following error messages Mes...

Страница 190: ...ensor If a signal at another frequency is to be measured the new center frequency can be transferred to the power sensor by entering the frequency FREQ softkey Press the FREQ softkey The frequency val...

Страница 191: ...easurement weighting For forward power display the R S FSH provides both average power and peak envelope power Use the POWER DISPLAY softkey in the Power Sensor menu to switch between the two Press th...

Страница 192: ...and reflected power display opens Using the rotary knob or the cursor keys select the parameter for which a unit is to be entered Confirm the parameter with the ENTER key or the POWER DISPLAY softkey...

Страница 193: ...h the ENTER key or the REF softkey To switch off the relative measurement to absolute values press the POWER DISPLAY softkey Select the Forward Power parameter Select dBm or Watt for forward power ind...

Страница 194: ...y The value entry box for the reference offset opens Enter the desired offset using the rotary knob the cursor keys or the number keys and confirm the entry with the ENTER key The selected offset is d...

Страница 195: ...SH K2 are possible for increasing the dynamic range and the measurement accuracy The operation of vector measurements primarily differs in the expanded calibration routines In addition the R S FSH K2...

Страница 196: ...e tracking generator the frequency range you want and the appropriate reference level should be set because calibration is only valid for the calibrated frequency range and reference Changing these pa...

Страница 197: ...oftkey Measuring the transmission of two ports To perform a transmission measurement connect the input of the DUT to the generator output and the DUT s output to the RF input of the R S FSH The R S FS...

Страница 198: ...o the tracking generator output without the DUT Press the softkey F1 or F2 CONTINUE to start calibration To abort calibration press the fourth or fifth softkey CANCEL During calibration the R S FSH ou...

Страница 199: ...calibration data can be stored along with the other settings see Chapter 2 section Saving Calibration Data Thus once the setting has been retrieved measurement can be performed without first performi...

Страница 200: ...te for a fixed loss or gain during the measurement Vector transmission measurement only with option R S FSH K2 With vector measurements the R S FSH analyzes both magnitude and phase of the receive sig...

Страница 201: ...oftkey To calibrate the transfer measurement the R S FSH requests that the RF input be connected to the tracking generator output Connect the RF input of the R S FSH directly to the tracking generator...

Страница 202: ...orner of the display Measuring the transmission phase Press the MEAS MODE softkey Using the rotary knob or the cursor keys select PHASE from the menu and confirm by pressing either the MEAS MODE softk...

Страница 203: ...ftkey Using the rotary knob or the cursor keys select WRAP from the menu and confirm by pressing either the TRACE MODE softkey or the ENTER key Scaling the phase unwrap display You can display the ent...

Страница 204: ...or the cursor keys and confirm with the ENTER key You can shift the reference of the phase measurement for example to move the test trace to the center of the screen Press the AMPT key Press the REF P...

Страница 205: ...UTS in which phase delay and group delay match Due to the significantly wider aperture the measurement certainty is an order of magnitude higher in the phase delay measurement than in the group delay...

Страница 206: ...s too small the influence of result value noise will be too great Press the MEAS MODE softkey Using the rotary knob or the cursor keys select GROUP DELAY from the menu and confirm by pressing either t...

Страница 207: ...or the cursor keys enter the reference value and confirm by pressing either the ENTER key or one of the units keys Alternatively you can set the reference value using the rotary knob or the cursor ke...

Страница 208: ...s controlled via the control cable which is connected with the power sensor socket of the R S FSH Due to the insertion loss of the VSWR bridge the output level of the tracking generator is typically 4...

Страница 209: ...ical frequency independent correction value an additional level measurement uncertainty of max 2 dB must be anticipated Operation Press the MEAS key Select the MEASURE softkey Select ANALYZER from the...

Страница 210: ...R S FSH Z3 bridge can be selected Select AUTO DETECT or BRIDGE FSH Z3 from the menu by using the rotary knob or the cursor keys and confirm the entry with the HARDWARE SETUP softkey or the ENTER key I...

Страница 211: ...is is done by applying a suitable voltage at the BIAS 1 and BIAS 2 BNC inputs of the VSWR bridge Reflection measurements The VSWR Bridge R S FSH Z2 or R S FSH Z3 is required for reflection measurement...

Страница 212: ...SHORT calibration Connect a short to the measurement input of the bridge Using CONTINUE start the SHORT calibration Calibration can be aborted with CANCEL Note Instead of a SHORT the R S FSH can be ca...

Страница 213: ...r in standing wave ratio VSWR reflection coefficient REFL COEFF ROH and reflection coefficient REFL COEFF mROH Select the desired display unit by using the cursor keys or rotary knob Note In the case...

Страница 214: ...waveform reflected by the DUT according to magnitude and phase by means of the correction values obtained from calibration In addition to calibration with open circuit and short circuit calibration w...

Страница 215: ...ion can be aborted at any stage with the CANCEL softkey When the open circuit calibration is over the R S FSH outputs a message requesting the termination of the measurement port into a short circuit...

Страница 216: ...the calibrated frequency range Uncal is displayed in the upper right hand corner of the screen when calibration is no longer valid If the reference level is changed AMPT key REF softkey after calibra...

Страница 217: ...ar measurement of reflection Measuring the reflection phase Press the MEAS MODE softkey Using the rotary knob or the cursor keys select PHASE from the menu and confirm by pressing either the MEAS MODE...

Страница 218: ...NTER key Press the EL LENGTH softkey Using the rotary knob or the cursor keys select EL LENGTH ON from the menu and confirm by pressing either the EL LENGTH softkey or the ENTER key The R S FSH shows...

Страница 219: ...er functions marker delta marker multi marker see also section Using the Markers The Smith chart also provides additional marker formats for vector reflection measurements Press the MARKER key The R S...

Страница 220: ...the marker value for the impedance in complex format with real and imaginary components In addition the imaginary component of the impedance is converted to inductance or capacitance and displayed wi...

Страница 221: ...or 50 and 75 systems If a system has a different impedance value any value from 1 m to 10 k can be entered Selecting a predefined reference impedance Using the rotary knob or the cursor keys select th...

Страница 222: ...using the numeric keys Press the ENTER key to complete the entry To deactivate the VSWR limit value If starting from the main menu for the tracking generator press the MEAS key If starting from any ot...

Страница 223: ...w or the zoom factor Press the ZOOM FACTOR softkey Select the desired zoom factor 2 4 or 8 by using the rotary knob or cursor keys or by entering a numeric value Confirm the selection with the ENTER k...

Страница 224: ...OUT key Measuring the group delay when measuring reflection For more information see section Measuring the group delay when measuring transmission Press the MEAS MODE softkey Using the rotary knob or...

Страница 225: ...it is useful to switch to the spectrum display To eliminate having to dismount the VSWR bridge each time a typical value for the insertion loss of the VSWR bridge is incorporated in the measurement T...

Страница 226: ...he cursor keys and confirm the entry with the HARDWARE SETUP softkey or the ENTER key If you select AUTO DETECT the VSWR bridge is detected automatically as soon as the control cable has been connecte...

Страница 227: ...ncy range on the R S FSH Switch on vector measurement MEAS key MEAS MODE softkey VECTOR menu item Calibrate the R S FSH MEAS key RELECT CAL softkey Connect the cable to be measured to the measurement...

Страница 228: ...reinforcement or cancellation Because of this effect there is ripple on the received sum signal in the frequency domain The R S FSH fast Fourier transforms the received signal to the time domain Usin...

Страница 229: ...quency dependent cable models can be generated with the supplied R S FSH View Windows software package and loaded into the R S FSH The procedure is described in the R S FSH View manual The R S FSH can...

Страница 230: ...l has been selected The cable model can be checked or modified using the DEFINE USER MOD softkey Press the DEFINE USER MOD softkey A menu for entering the frequency the velocity factor and the attenua...

Страница 231: ...ngth that is too short is a good way of increasing distance to fault accuracy for a fault that is near to the measurement plane If the entered cable length is greater than the actual length the measur...

Страница 232: ...equency This prevents a message from being output stating that the desired center frequency cannot be set for the span currently being used for the distance to fault measurement Press the SPAN key The...

Страница 233: ...d as precisely as a SHORT Note The reference plane must be the output of the 1 m measurement cable i e the measurement cable may not be dispensed with If the output of the VSWR bridge is used as the r...

Страница 234: ...t temperature must not change by more than 5 C after calibration If the temperature changes by more than 5 C a red circle is placed ahead of DTF CAL to indicate that there is a risk of increased measu...

Страница 235: ...lecting the display range scaling opens You can select a display range by using the cursor keys or the rotary knob Confirm the selection by pressing the ENTER key or the RANGE softkey The R S FSH now...

Страница 236: ...eans of the marker function The distance to cable faults or the distance between any two faults can also be read off with the marker Press the MARKER key The R S FSH opens the marker menu and places t...

Страница 237: ...ursor keys step 10 of the span As is the case with spectrum analysis the R S FSH provides functions to automatically position the marker or the marker offset on the trace These can all be accessed by...

Страница 238: ...oomed by the factor 6 Faults mainly at the end of the cable can thus be clearly distinguished Switch the zoom function off as follows Press the MARKER MODE softkey in the marker menu Using the rotary...

Страница 239: ...to fault measurement If a marker offset is defined all distance values output by the R S FSH are referenced to the position of the offset marker Automatic marker positioning PEAK NEXT PEAK MINIMUM is...

Страница 240: ...measuring return loss DTF refl cal is displayed in the upper right hand corner of the screen Further information Setting the span If automatic setting AUTO SPAN is used the R S FSH automatically sele...

Страница 241: ...nts SPAN manually set span AUTOSPAN span used by the R S FSH in automatic setting of the span In the above measurement example the resolution is thus 202 points for a cable length of 25 m i e the dist...

Страница 242: ...tion It then calculates the IFFT result into length units from the cable parameters light velocity and frequency range In addition the R S FSH considers the attenuation of the cable to be measured in...

Страница 243: ...changed The points on the y axis are always dB values If the scale on the y axis is linear unit V or W the R S FSH automatically switches to the respective dB unit after a limit line has been switched...

Страница 244: ...fault measurements It is also indicated whether the limit lines are assigned to absolute frequency time or distance values abs or whether they are specified relative the center of the x axis rel In t...

Страница 245: ...mits PASS is displayed at the top in the center of the diagram FAIL is indicated even if only a single measured value pixel of the trace exceeds a limit value As long as a decision about limit violati...

Страница 246: ...erformed outside the definition range Data sets containing limit lines The R S FSH stores data sets together with any limit lines that may have been active for the measurement in question When such a...

Страница 247: ...on between the values is performed with the aid of a modified spline algorithm Even if only relatively few values such as maxima minima and turning points are available this algorithm can easily simul...

Страница 248: ...u can be quit with TRD S OFF all transducer factors can be switched off Press the TRANSD softkey The R S FSH displays a list of transducer factors available in the unit The cursor is on the active tra...

Страница 249: ...sducers If the unit of the transducer is dB the units dBm dBmV or dBOV remain unchanged The linear units Volt and Watt are not permissible They are deactivated in the units menu If the unit of the tra...

Страница 250: ...d range to be zero Data sets containing transducer factors The R S FSH stores data sets together with any transducer factors that may have been active for the measurement in question When such a data...

Страница 251: ...sducer factors are antenna specific and are supplied together with the TS EMF antenna Transducers are loaded into the R S FSH by means of the R S FSH View control software see also Measuring with Tran...

Страница 252: ...exits the transducer menu and TRD S OFF deactivate all transducer factors Press the TRANSD softkey The R S FSH will open the menu for selecting the transducers for the X Y and Z axes Select an axis w...

Страница 253: ...be calculated and displayed Measurement of the resultant field strength in a transmission channel with large bandwidth To measure the resultant field strength in a transmission channel with large band...

Страница 254: ...the R S FSH to other transmission systems Operation Press the CHANNEL POWER key The R S FSH will open the measurement function menu To exit the channel power menu press the SPECTRUM softkey The R S F...

Страница 255: ...USER standard is called When changing settings keep the following in mind The span is always coupled with the channel bandwidth If you change the bandwidth the R S FSH will automatically set the corr...

Страница 256: ...with the ENTER key or the STANDARD softkey The R S FSH will open the window for entering the name of the USER standard Enter a name of your choice by using the numeric keys Confirm the entry with the...

Страница 257: ...wer measurement It will then set the optimum reference level Setting the channel bandwidth The channel bandwidth is used to define the bandwidth in which the R S FSH calculates the resultant field str...

Страница 258: ...largest span that is permitted in the channel power measurement is ten times the channel bandwidth At larger spans the result would be increasingly inaccurate because not enough points of the trace ar...

Страница 259: ...s the POWER DISPLAY softkey Select PWR DISP ON by using the rotary knob or cursor keys and confirm with the POWER DISPLAY softkey or the ENTER key Unit for displaying the resultant field strength The...

Страница 260: ...e channel configuration otherwise no synchronization is possible Primary common control physical channel P CCPCH Primary synchronization channel P SCH Secondary synchronization channel S SCH The Symbo...

Страница 261: ...d to prevent incorrect measurements the R S FSH is equipped with an automatic routine for setting the reference level After setting the carrier frequency to the 3GPP signal you should first perform th...

Страница 262: ...he ENTER key or SCRAMB CODE softkey Manual entry of the secondary scrambling code Press the SCRAMB CODE softkey Select the SECONDARY SC menu item by using the rotary knob or cursor keys Confirm select...

Страница 263: ...search takes about 22 s The progress is indicated as a percent figure on the display As soon as it has found a scrambling code the R S FSH synchronizes to the 3GPP signal of the base station The scre...

Страница 264: ...rectly If only one antenna is available press the ANT DIV softkey and select ANT DIV OFF from the menu by using the rotary knob or the cursor keys To confirm press either the ENTER key or the ANT DIV...

Страница 265: ...ored by the number of data sets stored with calibration data Storage of calibration data can be selected in the SETUP menu see Chapter 2 section Saving Calibration Data If cable models channel tables...

Страница 266: ...Free Locations are also displayed in the text box Since the data sets can be different in size the remaining storage space is indicated as a percentage value The data set name comprises a text section...

Страница 267: ...entry with the ENTER key The data set is saved to the R S FSH s internal memory under the name that has been given Loading measurement results Previously saved measurement results and settings can be...

Страница 268: ...he measurement and settings stored in the data set to a printer using PRINT press EXIT to quit the setting again When you press the EXIT softkey you return again to the display mode where all saved da...

Страница 269: ...ASETS softkey Press the DELETE ALL DATASETS softkey Before all the data sets are deleted the R S FSH asks the user if he is sure that he wants to delete all the data sets The deletion of all data sets...

Страница 270: ...PRINT menu and the printout function offers to print out the current screen to a printer Instrument settings can also be saved and data sets loaded or deleted The SCREEN PRINTER softkey starts the scr...

Страница 271: ...at all obvious what the harmonic content of the signal is or if low level signals are superimposed This is easy to see with a spectrum analyzer The following Fig shows the theoretical basis of the two...

Страница 272: ...25 MHz Up to 3 GHz the R S FSH6 uses the same IFs as the R S FSH3 Between 3 GHz and 6 GHz it uses a first IF at 7231 MHz which it converts to the second IF of 831 25 MHz with the aid of the second loc...

Страница 273: ...dth of the IF filter cannot be resolved This is why the bandwidth of the IF filter in a spectrum analyzer is referred to as the resolution bandwidth The R S FSH has resolution bandwidths from 1 kHz to...

Страница 274: ...ow show a weak sine signal In the first Fig it is measured with a large video bandwidth and in the second with a narrow video bandwidth Limiting the video bandwidth smoothes the trace considerably Thi...

Страница 275: ...the operating principles of detectors a few recommendations can be made as to their use It is best to use the Auto Peak detector or the peak detector for spectrum analysis over large frequency ranges...

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