R&S FSV-K54 EMI Measurement Application User Manual
Contents
1. A ee Configuring the Measurement Parameters lt LISNType gt TWOPhase 2 Phase networks FOURphase 4 Phase networks ESH3z5 ESH2z5 ENV4200 ENV216 RST Example INP LISN TYPE ESH3z5 Selects the ESH3z5 network Mode R Manual operation See LISN Control on page 17 SENSe BANDwidth BWIDth RESolution Bandwidth This command defines the resolution bandwidth In realtime mode the resolution bandwidth is always coupled to the span In all other modes a change of the resolution bandwidth automatically turns the coupling to the span off Note that EMI measurements R amp S FSV K54 provide additional 6 dB bandwidths Parameters Bandwidth refer to data sheet RST AUTO is set to ON Example BAND 1 MHz Sets the resolution bandwidth to 1 MHz Manual operation See Res BW CISPR CISPR 6 dB on page 16 See Res BW Mil Std MIL Std 6 dB on page 17 SENSe BANDwidth BWIDth RESolution TYPE FilterType This command selects the type of resolution filter When changing the filter type the next larger filter bandwidth is selected if the same filter bandwidth is not available for the new filter type 5 Pole filters are not available when using the sweep type FFT EET RE E E EE E E SSS User Manual 1176 7555 02 02 25 R amp S FSV K54 Remote Commands for EMI Measurements Parameters lt FilterType gt Example Manual operation Configuring the M2. R amp S FSV K54 is suitable for measurements according to commercial and military EMC standards The functionality of the option is particularly useful in research and develop ment The firmware option is available for the R amp S FSVR realtime spectrum analyzer and the R amp S FSV signal and spectrum analyzer The R amp S FSV K54 features e EMI measurement marker functionality e marker demodulation with option R amp S FSV B3 e measurement bandwidths and detectors for EMI measurements e logarithmic scaling of the frequency axis e additional predefined limit lines for EMC standards e predefined transducer factors e LIN control with option R amp S FSV B5 The R amp S FSV K54 integrates its functionality into the measurement and marker func tions that are available in spectrum mode This manual describes the functionality that is part of the R amp S FSV K54 only All functions not discussed in this manual work as described in the documentation for the R amp S FSVR or the R amp S FSV e g frequency or amplitude settings The latest version is available for download at the product homepage http www2 rohde schwarz com product F SVR html The latest version is available for download at the product homepage http www2 rohde schwarz com product F SV html User Manual 1176 7555 02 02 6 R amp S FSV K54 e 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 1 Measurement Background Selecting a Detector Measure
3. MARKer lt m gt FUNCtion FMEasurement PSEarch AUTO on page 29 Dwell time CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement DWEL1 on page 33 All marker off CALCulate lt n gt MARKer lt m gt AOFF on page 28 CALCulate lt n gt DELTamarker lt m gt AOFF on page 27 See also the documentation of the base unit for information on how to remotely work with markers in general Final Evaluation The reference section contains an overview of all functions that are part of the chapter and lists the associated elements of the user interface Dwell Time Sets the dwell time for the EMI marker measurement For more information see chapter 3 7 Measuring at the Marker Position on page 14 Remote command CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement DWEL1 on page 33 EEUU RU EE E RE e L LLLLLLLLLLLLLLLLLLLLALLLLLAAAAAAAAAAAAAAAAAAAAALLLLLMLZA User Manual 1176 7555 02 02 20 R amp S FSV K54 Configuring and Performing the Measurement Final Evaluation Marker Table If more than two markers have been activated the application adds a marker table to the display below the diagram area The size of the table depends on the number of markers that are active It contains the following information for every marker EMI Measurement Marker Type Ref Trace 1 q 9 7 e Type Shows the marker type The marker type is either a normal
4. User Manual 1176 7555 02 02 18 R amp S9FSV K54 Configuring and Performing the Measurement mesa s H pwqnur Peak Search Marker Configuration Marker 1 8 Selected State Type ef Trace Detector SnD Ge com On Off Delta to IC v On Off OOE Delta to J gPeak v On Off SEHE Delta to 1 crsPRav s c o 7 7 T LL 3 s Iv On Off e Delta to v On Off SEHE Delta to v On Off SHE Delta to v On Off SEHE Delta to v On otf iE Delta to Auto Peak Ww Dwell Time gie mm All Marker Off e Selected Selects one of the markers The currently selected marker is highlighted in orange color The label indicates the marker type and its number e State Turns the marker on and off e Type Selects the marker type The first marker always is a normal marker abbreviated N Normal markers determine absolute signal levels In the diagram area they are drawn as a triangle pointing up Kd If you add more markers these will be delta markers by default abbreviated D Delta markers show signal levels in relation to another normal marker by default in relation to the first marker If necessary you can still change the reference marker in the Ref column In the diagram area delta markers are drawn as a tri angle pointing down fi When p
5. e you should set a time that is long enough to capture several complete pulses at least 10 when measuring pulsed signals e you should be aware that the time is determined by the lowest modulation fre quency to be averaged The average detector is already available with the base unit RMS detector The RMS detector evaluates the root mean square RMS value over the specified dwell time and displays the resulting value The integration time is the specified dwell time Regarding measurement time you can follow the guidelines of the average detector The RMS detector is already available with the base unit Sample detector The sample detector displays the last value from the samples allocated to a pixel The sample detector is used for noise or phase noise marker calculation However it is unreliable if the displayed span is much greater then the resolution bandwidth or if the tuning steps of the local oscillator are too large The sample detector is available in spectrum or real time mode Quasipeak detector R amp S FSV K54 only The quasipeak detector displays the maximum signal level weighted to CISPR 16 1 1 that was detected during the dwell time Regarding measurement time e you should select a dwell time of at least 1 second when measuring unknown sig nals This value makes sure that pulses down to a frequency of 5 Hz are weighted correctly e you can select a shorter time when measuring known signals as the sign
6. 3 3 Setting the Number of Sweep Points The number of sweep points defines the number of measurement values collected dur ing one sweep Thus increasing the sweep points also increases the accuracy of the results regarding the frequency resolution Because EMI measurements often cover a large frequency range you should define an adequate number of sweep points especially when performing the measurement on a logarithmic axis Like on a linear axis the distance from one sweep point to the next is calculated graphically on a logarithmic axis and is not based on the frequency itself Thus the frequency resolution between two sweep points deteriorates with higher fre quencies gt d t Insufficient sweep points Resolution filter bandwidth Resolution filter bandwidth Filter may miss a signal covers one sweep point covers several sweep points The resolution bandwidth should cover at least one sweep point more is better If this condition is not met signals or interferences could be missed during final evaluation of narrowband interferers Example Linear axis lom lco c ul L 1 MHz 10 MHz In case of a linear axis the distance between the sweep points is equal e g 200 kHz Logarithmic axis eee eee eee ee ee eee eee eee ee ee EEE ee ee OO D ee 1 Hz 1 MHz TGHz In case of a logarithmic axis the distance between sweep points is variable In the spectrum from 10 Hz to 100 Hz the
7. ESH3 Z5 and ENV 216 two four line nwtworks ESH2 Z5 and ENV 4200 e Phase Selects the phase to be measured Phase N and L1 are included in all four LISN Phase L2 and L3 are only included in four line networks You can select one phase for a measurement only e 150 kHz HP Turns on a 150 kHz highpass filter The filter is available for the ENV 216 network only For more information see chapter 3 4 Controlling V Networks LISN on page 11 Remote command LISN type INPut LISN TYPE on page 24 Phase INPut LISN FILTer HPASs STATe on page 24 Highpass filter INPut LISN TYPE on page 24 Peak Search The reference section contains an overview of all functions that are part of the chapter and lists the associated elements of the user interface Auto Peak Search Turns the automatic marker peak search on and off For more information see chapter 3 6 Performing a Peak Search on page 12 Remote command CALCulate c n MARKer m FUNCtion FMEasurement PSEarch AUTO on page 29 Marker Configuration To make the process of configuring markers as easy as possible the R amp S FSV K54 features a Marker Configuration dialog box that contains all marker characteristics necessary to perform successful EMI measurements The dialog box is made up out of two tabs The first tab controls markers 1 to 8 the second tab controls markers 9 to 16 ERREUR EE E E E E e LLLLLLLLLLLLLLLLLLLLLLLLLLLAALAAAALLLLLLILM Jg
8. NumberPoints gt This command defines the number of measurement points to be collected during one sweep Parameters lt NumberPoints gt Range 101 to 200000 RST 691 Example SWE POIN 251 Manual operation See Sweep Points on page 17 Performing a Peak Search CAL Culate nz DEL TamarkercmzAOEE 27 ele EE RI BN NEE E E TRACE EE 27 GALGulate n MARKersm uAOEFP E 28 CAL Culate nz M Abker mzFUNGCHontMEasurement DE Techor 28 CALCulate n DELTamarker m FUNCtion FMEasurement DE Tector 29 CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement PSEarch AUTO cccceccceeeeeeeeeees 29 CAL Culate nz M bkercmz TR ACe 20 CALCulate lt n gt DELTamarker lt m gt AOFF This command turns all active delta markers off Suffix lt n gt Selects the measurement window lt m gt Selects the marker Example CALC DELT AOFF Switches off all delta markers Manual operation See Marker Configuration on page 18 CALCulate lt n gt DELTamarker lt m gt TRACe lt TraceNumber gt This command selects the trace a delta marker is positioned on The corresponding trace must have a trace mode other than Blank User Manual 1176 7555 02 02 27 R amp S FSV K54 Remote Commands for EMI Measurements Mu a a A s Yi ened Performing a Peak Search In the persistence spectrum result display the command also defines
9. distance is a few Hz Between 100 MHz and 1 GHz the distance is several MHz The R amp S FSV supports a maximum of 200000 sweep points This number is based on typical bands measured with a single resolution bandwidth There are sufficient sweep points to make sure that a signal is found when doing the final evaluation Even when covering 30 MHz to 1 GHz with logarithmic scaling and 120 kHz RBW 3 4 Controlling V Networks LISN For measurements with power lines the R amp S FSV K54 adds functionality to directly control a line impedance stabilization network LISN ERREUR E I E E E e LL 1 L LLLLLLLLLLLLLLLLLLLLLLLLLLLLC LLLIX X User Manual 1176 7555 02 02 11 R amp S FSV K54 Measurement Background a o a Using Transducer Factors You can connect the LISN to the userport The R amp S FSV K54 supports several V net works e Four line V networks ESH2 5 ENV4200 e Two line V networks ESH3 Z5 ENV216 After selecting the type of network you can define the phase you want to test for inter ferences Phase N and L1 are available for two line networks Four line networks in addition have access to phase L2 and L3 The R amp S FSV K54 allows you to test one phase at a time For the ENV 216 network a 150 kHz high pass filter is available for protection of the input Note that LISN control is possible on
10. for the base unit The base unit also provides various predefined limit lines that you can use for various applications For easier evaluation of EMI measurement results the R amp S FSV K54 adds additional predefined limit lines to those already present The limit lines specific for EMI measure ment have been designed in compliance with several EMC standards When you are using limit lines in combination with EMI measurements note that the limit check does not respond to the marker level and position That means that you won t necessarily see if a peak violates a limit Instead it only responds if the trace itself violates the limit line For more information on using limit lines see the documentation of the base unit EI User Manual 1176 7555 02 02 15 R amp S FSV K54 Configuring and Performing the Measurement Measurement Configuration 4 Configuring and Performing the Measure ment This chapter contains a description of all functions available with the EMI measurement application 4 1 Measurement Configuration eese eene nnn riri 16 4 2 Peak Search geess EES 18 ASS Final Evaluatior iiie eie elei 20 4 1 Measurement Configuration The reference section contains an overview of all functions that are part of the chapter and lists the associated elements of the user interface Filter Type Opens a submenu to select the filter type The submenu contains the following softkeys e Norm
11. marker N or delta marker D e Ref Shows the reference marker Applicable only for delta markers e Trace Trace number the marker is positioned on You can turn on a maximum of six traces at the same time Each trace has a different color e Frequency Frequency of a peak that was detected during the peak search For normal mark ers this is a absolute value for delta markers this is a relative value The corre sponding reference marker for delta markers is indicated in the Ref column e Level Signal level at the marker position according to the trace detector For normal markers this is an absolute value for delta markers this is a relative value The cor responding reference marker for delta markers is indicated in the Ref column The unit for absolute markers depends on the selected unit The unit for relative markers is dB e Detector Detector that has been assigned to the EMI measurement marker e Al mit Shows the distance of the marker level to all active limit lines The order of results depends on the order in that you have loaded the limit lines and is the same as the order in the status register The result is either a relative value in dB or three dashes In case of three dashes the marker is either ona different trace than the limit line or ona horizontal position that is not covered by the limit line The delta limit is shown only if you have assigned a detector to the measurement marker e
12. 4 Contents E 5 1 1 Notes for Users of R amp S FSV 1307 9002Kxx Models eese 5 2 gei eL 6 3 Measurement Background eeeeeeeeeeeeeeeeeeeeeneennnnnnnnnn 7 3 1 Selecting a Detector eiecti trn SERNEEEEEEESE NEEN 7 3 2 Selecting the Measurement Bandwidth eene 10 3 3 Setting the Number of Sweep Points esee 11 3 4 Controlling V Networks LISN esses nennen nnne nnn 11 3 5 Using Transducer Factors eeeesseeeeeeeee nennen nennen nnn nnne tenni rient 12 3 6 Performing a Peak Search eese eene nennen nnne nnn nnne nnn nnne 12 3 7 Measuring at the Marker Position eese nennen nnn 14 3 8 Evaluating the Results cesse ene en nnne nnne nnne nnn nr in nnn innen nnne 14 4 Configuring and Performing the Measurement 16 4 1 Measurement Configuration eeeeseeeeeeeeeeeeeenee nnne nnne nnne nnne neni nien 16 4 2 Peak Search com ecd eet eel eei iue cities 18 4 3 Final GU e DEE 20 5 Remote Commands for EMI Measurements 23 5 1 Configuring the Measurement seeeseeeseeeeeeeeeeenennnnn nennen nennen nennen nnn nn 23 5 2 Performing a Peak Search netten tenete eiet tik kR Rn IIR RR RRRRDRRRRR RR EEN 27 5 3 E
13. BANDwidth BWIDth RESolution on page 25 Sweep Points Opens an edit dialog box to enter the number of measured values collected during a single measurement For more information see chapter 3 3 Setting the Number of Sweep Points on page 11 Remote command SENSe SWEep POINts on page 27 Freq Lin Log Turns logarithmic scaling of the frequency axis on and off By default the frequency axis has linear scaling Logarithmic scaling of the frequency axis however is common for EMI measurements over large frequency ranges as it enhances the resolution of the lower frequencies On the other hand high frequencies get more crowded and become harder to distinguish Because it shows the lower frequencies more clearly logarithmic scaling is used for tests that focus on those frequencies for example acoustic tests and measurements Remote command DISPlay WINDow lt n gt TRACe lt t gt X SPACing on page 23 LISN Control Opens a dialog box to control a LISN ESH2 Z5 ESHS3 Z5 150 kHz HP L on Rau I l I l I l l I l I l I gt I I Le I ENV4200 I I l I l l l l l l l l I l l l l l User Manual 1176 7555 02 02 17 R amp S FSV K54 Configuring and Performing the Measurement 4 2 Peak Search The dialog box contains the following elements e LIN Selects the V network that you have in use The R amp S FSV K54 supports two two line networks
14. DWEL I 33 CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement LIMit lt k gt CONDItiON 3 31 CAL Culate cnz MAb ker mz FUNGCion EMEasurementL Mitcks DEL Tat EN CAL Culate cnz MAb ker mz FUNGCion EMEasurementPGEarch AUTO 29 CAL Culate cnz MAb ker mz FUNGCion EMEasurement RE Gut 32 CAL Culate cnz MAb ker mz FUNGCionEMEasurementGTATe enne 23 CALCulate lt n gt MARKer lt m gt TRACE cccccecccceeeeeceeeeeeneeeseaeeecesaeeeseaaeeeseaeeessaeeeseaeeeeseaeeeseeaeeeseeaeeeseneeeesenaeeess 30 DISPlay WINDow n TRACe t X SPACing sss eese nente enn n en rnnr enne nnne 23 INPut EISN FIETer FIPASS STAT d i chins eer eet Aa ini iP et cese ain 24 INPutLISN PHAS 24 INPut EISN TYPE niente re deed iat i ate Ach dae idea ieee dd e t Perd e odds 24 ERREUR RE E SSSR User Manual 1176 7555 02 02 35 R amp S FSV K54 Index A Res BW Manual remote control 25 Sweep Points remote control 27 Auto peak search ssssessseeeen 12 18 Softkey Marker to Trace remote control 30 C Sweep POMS encre eeneg 11 CISPR Average nete tenent t e rie rre iere 7 T CISPR bandwidth sene 10 16 Transducer factor ssssssseeeeene 12 D V DGG CIOM D Dwell time Ano de 11 17 E le TEE 7 EMI
15. Easurement LIMit lt k gt CONDition 32 CALCulate n DELTamarker m FUNCtion FMEasurement LIMit k DELTa 33 CALCulate n MARKer m FUNCtion FMEasurement DWELI esee 33 CALCulate n DELTamarker m FUNCtion FMEasurement RE Gu 33 CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement LIMit lt k gt CONDition lt Condition gt This command queries the condition of a marker position in relation to a certain limit line Suffix lt n gt irrelevant lt m gt 1 16 marker lt k gt 1 8 limit line Return values lt Condition gt 0 The marker has passed the limit check 1 The marker is inside the margins of a limit line 2 The marker has failed the limit check Example CALC MARK1 FUNC FME LIM2 COND Queries the condition of marker 1 in relation to limit line 2 Usage Query only Manual operation See Marker Table on page 21 CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement LIMit lt k gt DELTa lt Amplitude gt This command queries the vertical distance from the marker position to the limit line The unit is dB If the marker has been assigned to a different trace than the limit line the command returns 200 Suffix lt n gt irrelevant lt m gt 1 16 marker lt k gt 1 8 limit line Return values lt Amplitude gt Vertical distance to the limit line in dB EE User Manual 1176 7555 02 02 31 R amp
16. Manual operation Performing a Peak Search OFF turns the marker off AVER average detector CAV CISPR Average detector CRMS RMS Average detector POS maximum peak detector QPE quasipeak detector RST OFF See Marker Configuration on page 18 CALCulate lt n gt DELTamarker lt m gt FUNCtion FMEasurement DETector lt Detector gt This command selects the detector for a specific deltamarker during the final evalua tion If the deltamarker hasn t been active yet the command also turns the deltamarker on Suffix lt n gt lt m gt Parameters lt Detector gt Manual operation irrelevant deltamarker OFF turns the deltamarker off AVER average detector CAV CISPR Average detector CRMS RMS Average detector POS maximum peak detector QPE quasipeak detector RST OFF See Marker Configuration on page 18 CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement PSEarch AUTO This command initiates a marker peak search User Manual 1176 7555 02 02 29 R amp S FSV K54 Remote Commands for EMI Measurements 5 3 Evaluating the Results Instead of the syntax element PSEarch you can also use PEAKsearch Suffix n irrelevant m irrelevant Usage Event Manual operation See Auto Peak Search on page 18 See Marker Configuration on page 18 CALCulate lt n gt MARKer lt m gt TRACe Trace This command selects the trace a marker is positioned on The correspo
17. R amp S9FSV K54 EMI Measurement Application User Manual IEEE 1176 7555 02 02 remen Test amp Measu This manual covers the following products e R amp S FSV K54 1310 0425 02 for the R amp S FSVR Realtime Spectrum Analyzer and the R amp S FSV Signal and Spectrum Analyzer This manual describes the following R amp S9FSV models with firmware version 2 20 and higher e R amp S FSV A 1321 3008K04 e R amp S FSV 7 1321 3008K07 e R amp S FSV 13 1321 3008K13 e R amp S FSV 30 1321 3008K30 e R amp S FSV 40 1321 3008K39 e R amp S FSV 40 1321 3008K40 It also applies to the following R amp S9FSV models However note the differences described in chapter 1 1 Notes for Users of R amp S FSV 1307 9002Kxx Models on page 5 e R amp S9FSV 3 1307 9002K03 e R amp S FSV 7 1307 9002K07 R amp S FSV 13 1307 9002K13 e R amp S FSV 30 1307 9002K30 R amp S FSV 40 1307 9002K40 2014 Rohde amp Schwarz GmbH amp Co KG M hldorfstr 15 81671 M nchen 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 amp S is a registered trademark of Rohde amp Schwarz GmbH amp Co KG Trade names are trademarks of the owners The following abbreviations are used throughout this manual R amp S9FSV K54 is abbreviated as R amp S FSV K54 R amp S FSV K5
18. Result Shows the signal level at the marker position according to the detector assigned to the corresponding marker The result is only displayed after the final measurement is done The overall measurement time depends on the dwell time If a limit line is active the result can have three colors green indicates that the marker has passed the limit check yellow indicates that the marker is in the margins of the limit line red and a star indicate that the marker has failed the limit check ETM User Manual 1176 7555 02 02 21 Final Evaluation For more information on limit lines see the documentation of the base unit The result is shown only if you have assigned a detector to the measurement marker Remote command Detector ALimit CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement LIMit lt k gt DELTa on page 31 CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement LIMit lt k gt CONDition on page 31 CALCulate lt n gt DELTamarker lt m gt FUNCtion FMEasurement LIMit lt k gt DELTa on page 33 CALCulate lt n gt DELTamarker lt m gt FUNCtion FMEasurement LIMit lt k gt CONDition on page 32 Result CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement RESult on page 32 CALCulate lt n gt DELTamarker lt m gt FUNCtion FMEasurement RESult on page 33 R amp S FSV K54 Remote Commands for EMI Measurements Conf
19. S FSV K54 Remote Commands for EMI Measurements sss a aed Evaluating the Results Example CALC MARK3 FUNC FME LIM2 DELT Queries the distance of marker 3 to the second limit line Usage Query only Manual operation See Marker Table on page 21 CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement RESult lt Result gt This command queries the result of the EMI measurement at the marker position Suffix lt n gt irrelevant lt m gt 1 16 marker Return values lt Result gt Power level The unit depends on the one you have currently set Example CALC MARK1 FUNC FME RES Queries the result of marker 1 Usage Query only Manual operation See Marker Table on page 21 CALCulate lt n gt DELTamarker lt m gt FUNCtion FMEasurement LIMit lt k gt CONDition lt Condition gt This command queries the condition of a deltamarker position in relation to a certain limit line Suffix lt n gt irrelevant lt m gt 1 16 deltamarker lt k gt 1 8 limit line Return values lt Condition gt 0 The deltamarker has passed the limit check 1 The deltamarker is inside the margins of a limit line 2 The deltamarker has failed the limit check Example CALC DELT2 FUNC FME LIM2 COND Queries the condition of deltamarker 2 in relation to limit line 2 Usage Query only LEE User Manual 1176 7555 02 02 32 R amp S FSV K54 Remote Commands for EMI Measu
20. a particular trace will be positioned on the most powerful peak of the corresponding trace Manual peak search If you turn the automatic peak search off you can put the markers manually to any fre quency you need more information about You can change the marker position with the rotary knob the cursor keys or position it to a particular frequency with the number keys Setting markers is the same as setting markers in normal spectrum mode For more information see the manual of the base unit Searching for peaks over several traces You can measure on six traces with a different weighting detector simultaneously In that case the application searches for peaks on all traces separately given that you have assigned at least one marker to that trace A typical selection for EMI measurement is to use the peak and the average detector If the premeasurement is done the application would look for peaks on the peak trace and the average trace separately so that the distribution of narrowband and wideband sources of interference can be taken into account For example the frequency of the maximum determined with the average detector can be used for the final measurement performed with this detector and the frequency found in the premeasurement carried out with the peak detector is taken for the final measurement using the quasipeak detector User Manual 1176 7555 02 02 13 R amp S FSV K54 Measurement Background Measuring at the M
21. al 3 dB e CISPR 6 dB e MIL Std 6 dB For more information see chapter 3 2 Selecting the Measurement Bandwidth on page 10 e Channel e RRC e 5 Pole not available for sweep type FFT Remote command SENSe BANDwidth BWIDth RESolution TYPE on page 25 Res BW CISPR CISPR 6 dB Selects the measurement bandwidth for commercial EMC standards according to CISPR If you select the bandwidth with the Res BW CISPR softkey the R amp S FSV automati cally changes the filter type to a 6 dB bandwidth For more information see chapter 3 2 Selecting the Measurement Bandwidth on page 10 Remote command Filter type SENSe BANDwidth BWIDth RESolution TYPE on page 25 Filter bandwidth SENSe BANDwidth BWIDth RESolution on page 25 EEUU RU EE E E LL SS e LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLUUAALU CL ULL User Manual 1176 7555 02 02 16 R amp S FSV K54 Configuring and Performing the Measurement Measurement Configuration Res BW Mil Std MIL Std 6 dB Selects the measurement bandwidths for military EMC standards If you select the bandwidth with the Res BW Mil Std softkey the R amp S FSV automati cally changes the filter type to a 6 dB bandwidth For more information see chapter 3 2 Selecting the Measurement Bandwidth on page 10 Remote command Filter type SENSe BANDwidth BWIDth RESolution TYPE on page 25 Filter bandwidth SENSe
22. al level does not change during the sweep After an internal switch the R amp S FSV waits until the measurement result has stabilized before it starts the actual measurement The quasipeak detector is available with the R amp S FSV K54 LEE User Manual 1176 7555 02 02 8 R amp S FSV K54 Measurement Background PEIEE Selecting a Detector CISPR Average detector R amp S FSV K54 only The CISPR Average detector displays a weighted average signal level according to CISPR 16 1 1 The average value according to CISPR 16 1 1 is the maximum value of the linear aver age value that was detected during the specified dwell time The CISPR Average detector is applied to measure pulsed sinusoidal signals with a low pulse frequency for example It is calibrated with the RMS value of an unmodula ted sinusoidal signal The average value is determined by lowpass filters of the 2nd order the simulation of a mechanical instrument The filter bandwidth and time constants of the detector are coupled to the receiver fre quency Band A Band B Band C D Band E Frequency range lt 150 kHz 150 kHz to 30 MHz 30 MHz to 1 GHz gt 1 GHz IF bandwidth 200 Hz 9 kHz 120 kHz 1 MHz Time constant of 160 ms 160 ms 100 ms 100 ms instrument Regarding measurement time e you should select a dwell time of at least 1 second when measuring unknown sig nals This time makes sure that pulses down to a frequency of 5 Hz are weight
23. arker Position 3 7 Measuring at the Marker Position Finding peaks with the help of a peak search reduces data to be evaluated and thus measurement time The R amp S FSV K54 performs the final evaluation automatically if the EMI measurement marker is turned on The measurement at the marker frequency starts immediately after the marker has been set The advantage of an immediate final evaluation is that it eliminates the risk of measurement errors based on frequency drifts of the disturbance signal The measurement at the marker frequency may have a different detector during the peak search This way the measurement consumes much less time because detectors with a long measurement time are needed only at the critical frequency The application also allows you to use multiple detectors for the final evaluation The advantage of multiple detection is that you will only need one test run to see if the results comply with the limits specified in a standard You can select and assign detec tors for EMI markers in the Marker Configuration on page 18 dialog box As EMC tests often require special measurement times you can also specify a dwell time for the measurement with the EMI markers The application shows the results in the Marker Table Defining a Dwell Time for the Final Measurement The dwell time defines for how long the R amp S FSV measures the signal at the frequen cies of the marker positions Thus the dwell time defines the amo
24. easurement NORMal Gaussian filters CFILter channel filters RRC RRC filters P5 5 Pole filters CISPr PULSe 6 dB CISPR filter commercial EMI standards 6 dB filters are available with firmware option R amp S FSV K54 EMI measurements Note when the filter type is queried the CISPR filter returns PULS MIL 6 dB MIL Std filter military EMI standard 6 dB filters are available with firmware option R amp S FSV K54 EMI measurements RST NORMal BAND TYPE NORM See Filter Type on page 16 See Res BW CISPR CISPR 6 dB on page 16 See Res BW Mil Std MIL Std 6 dB on page 17 SENSe WINDow DETector trace FUNCtion Function This command selects the detector for the data acquisition in the selected trace Suffix trace trace Parameters Function Example 1 6 Selects the trace 1 6 trace APEak NEGative POSitive SAMPle RMS AVERage QPEak CAVerage CRMS RST APEak DET POS Sets the detector to positive peak SENSe WINDow DETector trace FUNCtion AUTO State This command either couples the detector to the current trace setting or turns coupling off User Manual 1176 7555 02 02 26 R amp S FSV K54 Remote Commands for EMI Measurements 5 2 Performing a Peak Search Suffix lt trace gt 1 6 trace Parameters lt State gt ON OFF RST ON Example DET AUTO OFF SENSe SWEep POINts lt
25. ed correctly e you should select a long time for measurement on pulsed signals or signals that fluctuate slowly e you can select a short time when measuring unmodulated signals or signals with a high modulation frequency When you change the receiver frequency or the attenuation the R amp S FSV waits until the the lowpass filter has settled before starting the measurement The measurement time in that case depends on the resolution bandwidth and the characteristics of the signal The CISPR Average detector is available with the R amp S FSV K54 RMS Average detector R amp S FSV K54 only The RMS Average detector is a combination of the RMS detector for pulse repetition frequencies above a corner frequency and the Average detector for pulse repetition frequencies below the corner frequency It thus achieves a pulse response curve with the following characteristics 10 dB decade above the corner frequency and 20 dB decade below the corner frequency The average value is determined by lowpass fil ters of the 2nd order simulation of a mechanical instrument The detector is used for example to measure broadband emissions and may replace the quasipeak detector in the future User Manual 1176 7555 02 02 9 R amp S FSV K54 Measurement Background Ech Selecting the Measurement Bandwidth Band A Band B Band C D Band E Frequency range 150 kHz 150 kHz to 30 MHz 30 MHz to 1 GHz gt 1 GHz IF bandwidth 200 Hz 9
26. erforming EMI measurements however you usually want to have absolute marker readouts for all markers that you are using e Ref Selects the reference marker for delta markers By default the reference marker for all delta markers is the first marker This is active only for delta markers e Trace Selects the trace number the marker is positioned on You can place markers on any of the active traces The R amp S FSV K54 supports the use of up to four traces User Manual 1176 7555 02 02 19 R amp S FSV K54 Configuring and Performing the Measurement 4 3 Final Evaluation e Detector Selects the detector for the final measurement For more information see chapter 3 1 Selecting a Detector on page 7 e Auto Peak Turns automatic peak search for all markers on and off For more information see chapter 3 6 Performing a Peak Search on page 12 e Dwell Time Sets the dwell time for all markers For more information see chapter 3 7 Measuring at the Marker Position on page 14 e All Markers Off Turns all markers off Remote command Reference marker CALCulate lt n gt DELTamarker lt m gt MREF Trace CALCulate lt n gt DELTamarker lt m gt TRACe on page 27 CALCulate lt n gt MARKer lt m gt TRACe on page 30 Detector CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement DETector on page 28 CALCulate lt n gt DELTamarker lt m gt FUNCtion FMEasurement DETector on page 29 Auto peak CALCulate lt n gt
27. if the delta marker is positioned on the persistence trace or the maxhold trace Suffix n Selects the measurement window m Selects the marker Parameters lt TraceNumber gt 1 6 Trace number the marker is positioned on MAXHold Defines the maxhold trace as the trace to put the delta marker on This parameter is available only for the persistence spectrum result display WRITe Defines the persistence trace as the trace to put the delta marker on This parameter is available only for the persistence spectrum result display Example CALC DELT3 TRAC 2 Assigns delta marker 3 to trace 2 Manual operation See Marker Configuration on page 18 CALCulate lt n gt MARKer lt m gt AOFF This command all markers off including delta markers and marker measurement func tions Suffix lt n gt Selects the measurement window lt m gt depends on mode irrelevant Example CALC MARK AOFF Switches off all markers Usage Event Manual operation See Marker Configuration on page 18 CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement DETector lt Detector gt This command selects the detector for a specific marker during the final measurement If the marker hasn t been active yet the command also turns the marker on Suffix lt n gt irrelevant lt m gt marker EMN User Manual 1176 7555 02 02 28 R amp S FSV K54 Remote Commands for EMI Measurements Parameters lt Detector gt
28. iguring the Measurement 5 Remote Commands for EMI Measurements 5 1 This chapter features all remote commands specific to the R amp S FSV K54 It also fea tures remote commands that are available with the base unit but whose functionality is expanded or modified For remote commands controlling base unit functionality refer to the documentation of the base unit Configuring the Measurement CAL Culate nzM AbkermzFUNCHontMEasurement SGTATe nenen en en ererereeene 23 DISPlay WINDow n TRACe t X SPACing esses nennen nnns 23 le Fuer BER 24 INPUut EISNIFIETer3HIPASSESTATG a iiir rois tee chat reo tnr cerae tete Eee ENEE 24 tele Bl e de 24 SENSe BANDwidth BWIDth RESolution ecce t t ntt n 25 SENSe BANDwidth BWIDth RESolution TYPE ecce tttttnttnn 25 ISGENGe JiuiNDow DE TechorziracezfEUNCHon nennen 26 SENSeTIWINDow DETector trace FUNCtion AUTO eese 26 SENSe TS Eer edel Dach epo tetro RED nca Re gnare aba le eda EM e Dav dU 27 CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement STATe State This command turns the EMI measurement marker functionality on and off Suffix n irrelevant m irrelevant Parameters State ON OFF DISPlay WINDow lt n gt TRACe lt t gt X SPACing lt ScalingType gt This command toggles between linear and logarithmic display of the x axis Suffix lt n gt window For applications that d
29. kHz 120 kHz 1 MHz Time constant of 160 ms 160 ms 100 ms 100 ms instrument Corner frequency 10 Hz 100 Hz 100 Hz 1 kHz Regarding measurement time you can follow the guidelines of the CISPR Average detector The RMS Average detector is available with the R amp S FSV K54 3 2 Selecting the Measurement Bandwidth EMI testing require resolution filters with a 6 dB bandwidth The R amp S FSV adds the fol lowing bandwidths that comply to civil and military standards to those already available with the base unit Commercial CISPR FFC etc e 200 Hz e 9kHz e 120 kHz e 1MHz Military MIL Std e 10Hz e 100Hz e 1kHz e 10kHz e 100kHz e 1MHz If you select the bandwidth with the Res BW CISPR or Res BW Mil Std softkey the R amp S FSV automatically selects the 6 dB EMI filter If you select the bandwidth with the Res BW softkey you have to select one of the 6 dB filters commercial or military in the Bandwidth menu first to access those band widths You have to select the bandwidth with the rotary knob or enter the bandwidth directly with the alphanumeric keypad If you are using the Quasipeak CISPR Average or Average RMS detector the band width is fixed depending on the frequency For more information see chapter 3 1 Selecting a Detector on page 7 ERREUR E E E EE E SSSR LM User Manual 1176 7555 02 02 10 R amp S FSV K54 Measurement Background Setting the Number of Sweep Points
30. le final evaluation of interferences with the detectors specific to EMI measurements EET RE E E E e LLLLLLLLLLLLLLLLALLLLLLLLLLLLLLLLLLLLLLLLLLLLLLALULLLMMM A User Manual 1176 7555 02 02 12 R amp S FSV K54 Measurement Background Performing a Peak Search You can control markers in the Marker Configuration dialog box or turn them on with the Marker lt x gt softkey The results of the peak search are summarized in the Marker Table There are two ways to perform a peak search automatic and manual Automatic peak search By default the automatic peak search starts as soon as you turn on the EMI measure ment marker During the peak search the application looks for the strongest peaks in the frequency range you are measuring and positions a marker on those peaks When a limit line is assigned to the trace the level difference between the trace and the limit line determines the peak search The number of peaks it will find during the search depends on the number of markers you have turned on You can use up to 16 markers simultaneously The first marker is always on the most powerful peak while the last marker is always on the least powerful peak If the application finds a more powerful peak it will move one of the markers to that position and adjust the order of the other markers The application allows you to distribute markers among several traces If you do so the marker with the lowest number assigned to
31. ling V Networks LISN eere nennen nennen 11 Using Transducer FactOrs erret retener tenebo nna Enn RI Rua ERR RREIR 12 Performing a Peak Search eeeeeeeeeeeeeeeen enne nna nain nnne inris 12 Measuring at the Marker Position eeeeeeeseeeeneeneen nennen nnn 14 Evaluating the Results 5 nr rre an ERa ARAARA AANA RR Rn REDS 14 Selecting a Detector The R amp S FSV K54 adds new detectors to those already available with the base unit The additional detectors are especially designed for and required by EMI applications Positive and negative peak detector The maximum and minimum peak detectors displays the maximum and minimum sig nal level that was detected during the specified dwell time Regarding measurement time e you can use the shortest time possible when measuring unmodulated signals User Manual 1176 7555 02 02 7 R amp S FSV K54 Measurement Background i a a a ee am Selecting a Detector e you should set a time that is long enough to capture at least one complete pulse when measuring pulsed singals The minimum and maximum peak detectors are already available with the base unit Average detector The average detector displays the average signal level of the samples that were collec ted during the specified dwell time Regarding measurement time e you can use shortest time possible when measuring unmodulated signals
32. lts Return values Result Power level in dB related to the reference marker you have set for that delta marker Example CALC DELT3 FUNC FME RES Queries the result of delta marker 3 Usage Query only Manual operation See Marker Table on page 21 R amp S FSV K54 List of Commands List of Commands SENSe WINDow DETector trace FUNCtion sese 26 SENSe WINDow DETector trace FUNCtion AUTO esses nnne 26 SENSe BANDwidth BWIDth RE Golution eene enne n nnne nnns 25 SENSe BANDwidth BWIDth RESolution TYPE sss enne eene nnne nnne 25 IGENGe GWEepnbOoiNts nnne nen nenn th nrnn net nnnts dh rins id ntes nist rens enn rns inneren inn nnn sen nnns 27 CALCulate cnz DEI Tamarkerzmz AOEE A 27 CAL Culate nz DEL Tamarker mz FEUNGCionFMEasurement DE Techor 29 CALCulate lt n gt DELTamarker lt m gt FUNCtion FMEasurement LIMit lt k gt CONDItiON sssuuss 32 CALCulate n DELTamarker m FUNCtion FMEasurement LIMit k D I Tag 33 CAL Culate nz DEL Tamarker mz EUNGCionFMEasurement RE Gut 33 CALCulate lt n gt DELTamarker lt m gt TRACe ttti ttntttnttE Entr EESEEEEAEEEAEEEEESEEEAEEEn EEEE Sannn annant 27 CALCulatesn gt MARKer lt sm gt AOF Furini andain edite eode d ica gege Pre pua n ca eade Eod en o gc ee eu 28 CAL Culate cnz MAb ker mz FUNGCion EMEasurement DE Techor tet 28 CALCulate n MARKer m FUNCtion FMEasurement
33. ly with option R amp S FSV B5 Additional Interfaces Control cables for the various LISNs are available as accessories 3 5 Using Transducer Factors The R amp S FSV K54 supports the use of transducers in that it provides functionality to include transducer factors in the test setup Transducers are devices like antennas probes or current probes that are connected to the R amp S FSV to measure interferences or useful signals The transducer converts the measurand like field strength current or RFI voltage into a voltage across 50 Q During the measurement the transducer is considered a part of the instrument A transducer usually has a frequency dependent transducer factor that includes the frequency response of the corresponding device During level measurement the trans ducer factor automatically converts the results into the correct unit and magnitude A transducer factor consists of a maximum of 625 reference values Each reference value includes frequency unit and transducer factor The R amp S FSV K54 adds several predefined transducer factors In addition you can also create and edit new and existing transducer factors For more information see the documentation of the base unit 3 6 Performing a Peak Search The purpose of a peak search is to find signals with a high interference level quickly Usually the peak search is done with a fast detector like the peak or average detector The marker peak search is the basis for a possib
34. marker EMI marker evaluation seseeeseeeees 14 21 F Filter type EMI i netta tieni ep eddie 10 16 Final evaluation oae nenne ceae cie ri senti 14 21 Frequency axis scaling esee 17 L Bild uiii tret rerom nere 14 Liriear scaling rre rre tree 17 LISN E M M M N 11 17 Logarithmic scaling eeseeeeeenn 17 M Manual peak search sisesssesereesiseeisesirtssirnsennesrrnesernne 12 Marker demodulation 14 Marker table 21 Marker wizard 18 Measurement time essen 20 MIL Std bandwidth seeseeseee 10 17 P Peak search 12 18 PRASE p T 11 17 R Resolution bandwidth EMI sesssss 10 16 EIERE EMT 7 S softkey Detector Auto Select remote control 26 Detector Manual Select remote control 26 Filler Type ssi ceret pds rindende Filter Type remote control EC Freq Axis Lin Log remote control 23 Marker to Trace remote control Range Lin Unit remote control ES Range Linear 96 remote control Res BW remote control seesseesssss User Manual 1176 7555 02 02 36
35. ment Background EMI measurements can be very time consuming especially if weighting detectors are required for the measurement In addition EMC testing often requires various proce dures to locate local EMI maxima Such procedures are for example movements of an absorbing clamp variations in the height of the test antenna or the rotation of the DUT Covering all test setups with one of the slow EMI weighting detectors over the required frequency range would lead to very high measurement times Splitting the measurement procedure into several stages however can eliminate this problem The first stage or peak search is used to get a rough idea about the location of peak powers that may indicate interference over the required frequency range You can use a detector that allows for a fast sweep time e g the peak detector During the second stage or final evaluation the R amp S FSV performs the actual EMC test with detectors designed for and required by EMC standards To keep measure ment times brief the R amp S FSV performs a measurement only on frequencies you have marked with a marker or delta marker You can assign a different detector to every marker and thus test a particular frequency easily for compliance Selecting a Detector niter petet DESEN ENER ege 7 Selecting the Measurement Bandwidth eene 10 Setting the Number of Sweep Points eene nennen 11 Control
36. nding trace must have a trace mode other than Blank If necessary the corresponding marker is switched on prior to the assignment In the persistence spectrum result display the command also defines if the marker is positioned on the persistence trace or the maxhold trace Suffix n Selects the measurement window m depends on mode Selects the marker Parameters Trace 1 4 Trace number the marker is positioned on MAXHold Defines the maxhold trace as the trace to put the delta marker on This parameter is available only for the persistence spectrum result display WRITe Defines the persistence trace as the trace to put the delta marker on This parameter is available only for the persistence spectrum result display Example CALC MARK3 TRAC 2 Assigns marker 3 to trace 2 Manual operation See Marker Configuration on page 18 Evaluating the Results CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement LIMit lt k gt CONDition 31 CALOCulate n MARKer m FUNCtion FMEasurement LIMit k DELTa 31 CALCulate n MARKer m FUNCtion FMEasurement RESUIt eene 32 EEUU RE EE EE E E e LLLLLLLGOGOOGG OG OLLLLLLLLLLLLLLLLLLLLLLLLLLLLLULULULULUIXJ User Manual 1176 7555 02 02 30 R amp S FSV K54 Remote Commands for EMI Measurements REESEN Evaluating the Results CALCulate lt n gt DELTamarker lt m gt FUNCtion FM
37. o not have more than 1 measure ment window the suffix lt n gt is irrelevant lt t gt irrelevant Parameters lt ScalingType gt LOGarithmic LINear LOGarithmic Selects logarithmic scaling LiNear Selects linear scaling RST LINear User Manual 1176 7555 02 02 23 R amp S FSV K54 Remote Commands for EMI Measurements mA o7o PJ c U sm Configuring the Measurement Example DISP TRAC X SPAC LOG Mode A ADEMOD Manual operation See Freq Lin Log on page 17 INPut LISN PHASe Phase This command selects the phase of the LISN you want to measure Parameters Phase L1 L2 L3 N RST L1 Example INP LISN PHAS N Selects the N phase Mode R INPut LISN FILTer HPASs STATe State This command turns the 150 kHz highpass filter for the ENV216 network on and off Parameters State ON OFF value 1 description RST OFF Example INP LISN HPAS ON Turns the filter on Mode R Manual operation See LISN Control on page 17 INPut LISN TYPE lt LISNType gt This command selects the type of network EET RE E E E e L 1 LLLLLLLLLLLLILLLLOLLLLLLLALLALAAAAUACAUAULLHMI XS User Manual 1176 7555 02 02 24 R amp S FSV K54 Remote Commands for EMI Measurements a
38. rements Mu IM Eee eae Evaluating the Results Manual operation See Marker Table on page 21 CALCulate lt n gt DELTamarker lt m gt FUNCtion FMEasurement LIMit lt k gt DELTa This command queries the vertical distance from the deltamarker position to the limit line The unit is dB If the deltamarker has been assigned to a different trace than the limit line the com mand returns 200 Suffix lt n gt irrelevant lt m gt 1 16 deltamarker lt k gt 1 8 limit line Return values lt Amplitude gt Vertical distance to the limit line in dB Example CALC DELT3 FUNC FME LIM2 DELT Queries the distance of deltamarker 3 to the second limit line Usage Query only Manual operation See Marker Table on page 21 CALCulate lt n gt MARKer lt m gt FUNCtion FMEasurement DWELI lt Time gt This command defines the dwell time during the final measurement Suffix lt n gt irrelevant lt m gt irrelevant Parameters lt Time gt Range min value to max value RST 1s Default unit seconds Manual operation See Marker Configuration on page 18 See Dwell Time on page 20 CALCulate lt n gt DELTamarker lt m gt FUNCtion FMEasurement RESult lt Result gt This command queries the result of the EMI measurement at the deltamarker position Suffix lt n gt irrelevant lt m gt 1 16 marker E User Manual 1176 7555 02 02 33 Evaluating the Resu
39. unt of data that is included in the detection of the displayed results As each detector needs a different period of time to fully charge and discharge the minimum dwell time should not be shorter than the slowest detector in use 3 8 Evaluating the Results The R amp S FSV K54 provides functionality to evaluate the results Marker Demodulation The R amp S FSV is able to demodulate AM and FM signals for acoustic tests and moni toring purposes When the demodulator is active the R amp S FSV K54 demodulates the signal for all EMI marker positions The demodulation begins when the marker is turned on You can listen to the results during the measurement with headphones or with the internal speaker In case of frequency domain measurements the duration of the demodulation at each marker position is limited by the dwell time of the EMI measurement marker Measure ments in the time domain result in continuous demodulation of the signal on the center frequency Note that marker demodulation is only available with option R amp S FSV B3 AM FM Audio Demodulator EEUU RU E E E e A LLLLLLLLLLLLLEL J User Manual 1176 7555 02 02 14 R amp S FSV K54 Measurement Background m X A 2 KI Evaluating the Results Limit Lines General limit line functionality is already available
40. valuating the Results ssiri iaaa trennen tea AARAA NAANA AARAA 30 LIST OF eO Ir m 35 IT mr 36 User Manual 1176 7555 02 02 3 R amp S FSV K54 Preface Notes for Users of R amp S FSV 1307 9002Kxx Models 1 Preface 1 1 Notes for Users of R amp S FSV 1307 9002Kxx Models Users of R amp S FSV 1307 9002Kxx models should consider the following differences to the description of the newer R amp S FSV 1321 3008Kxx models e Functions that are based on the Windows7 operating system e g printing or set ting up networks may have a slightly different appearance or require different set tings on the Windows XP based models For such functions refer to the Windows documentation or the documentation originally provided with the R amp S FSV instru ment e The R amp S FSV 1307 9002K03 model is restricted to a maximum frequency of 3 GHz whereas the 1321 3008K04 model has a maximum frequency of 4 GHz e The bandwidth extension option R amp S FSV B160 1311 2015 xx is not available for the R amp S FSV 1307 9002Kxx models The maximum usable UO analysis bandwidth for these models is 28 MHz or with option R amp S FSV B70 40 MHz User Manual 1176 7555 02 02 5 R amp S FSV K54 2 Introduction Introduction The R amp S FSV K54 EMI measurement application is a firmware option that adds func tionality to perform EMI measurements to the base unit With its features the
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