WBS QM EMC test report1/241Document Change Record2/24Table of Contents (1)1DOCUMENT CHANGE RECORD (2)2DOCUMENT REFERENCES (4)2.1A PPLICABLE D OCUMENTS (4)2.2R EFERENCED D OCUMENTS (4)3INTRODUCTION (5)4EIT-01 (POWER) (6)5EIT-02 (DATA/HK INTERFACE) (7)6EIT-03 (ZERO & COMB) (9)7OPT-03 (ATTENUATOR STEP SIZES) (11)8PET-01 (COMB ANALYSIS) (12)9CS ON POWER LINES / COMMON AND DIFFERENTIAL MODE (13)10CS ON SIGNAL LINES / COMMON MODE (15)11CS TRANSIENTS ON POWER LINES (16)11.1C OMMON MODE (16)11.2D IFFERENTIAL MODE (18)12RS WITH E-FIELD (20)13RS WITH H-FIELD (23)14SUMMARY OF TEST RESULTS (24)3/242Document References2.1Applicable Documents2.2Referenced Documents4/243IntroductionThe WBS-QM EMC test was performed between 5th and 8th July 2004 at GEDIS in Kiel. Participants:Oliver Siebertz (KOSMA)Boris Kopf (KOSMA)Peter Boerner (MPAE)Walter Boogarts (MPAE)Eckhard Steinmetz (MPAE)Peter Sell (Gedis)General test conditions:∙The EMC test procedure is given in AD-03∙For a description of the test setup and equipment see AD-02∙No temperature stabilization was used during the WBO and WBE function and performance verification. As a consequence the stability of the WBS was rather poor.Even integrations with 200 scans (2 sec) showed a degradation of the radiometric performance. Nevertheless the baseline analysis using procedure PET-07 was still possible.∙Dedicated test harness instead of the QM harness.∙Additional tests which are not discussed here can be found in AD-05.5/244EIT-01 (Power)The power consumption was verified at the test facility before and after EMC testing. Test conditions:•EGSE #2•Breakout box and LISN •Power cable 8m•Supply voltage 26 V at WBE input•Current scaling factor EGSE #2 - AGILENT power supply: 0.9•Measurement accuracy is app. ± 0.005►Conclusion: All variations are within the measurement accuracy.6/245EIT-02 (Data/HK Interface) Test 1 (main interface & redundant interface):Test 2:7/24Test 3:This verification was done only after EMC testing.►Conclusion: Unit fully functional after test.8/246EIT-03 (Zero & Comb)All numbers below are ADC counts scaled to a single readout (CCD/ADC saturation level is 1024 counts).9/2410002000300040005000600070001015202530354045I l l u m i n a t i o n [c o u n t s ]Pixel numberLaser 1 pre Laser 1 postFigure 1: IF zero level measured with laser 1 before and after EMC testing.1000200030004000500060007000102030405060I l l u m i n a t i o n [c o u n t s ]Pixel numberLaser 2 pre Laser 2 postFigure 2: IF zero level measured with laser 2 before and after EMC testing.►Conclusion: The EMC test has no significant impact on subband efficiency and ripple. The measured changes are probably due to the different temperatures of the WBS during the measurement.10/247OPT-03 (Attenuator step sizes)The attenuator step sizes are measured with laser 2.Measurement accuracy is app. ± 0.1 dB.Pre EMC measurement:2004-07-05 10:02:13: MAIN step 1: 1.41 1.58 1.40 1.52 <1.48> [dB] 2004-07-05 10:02:13: MAIN step 2: 2.52 2.75 2.53 2.53 <2.58> [dB] 2004-07-05 10:02:13: MAIN step 4: 5.13 5.42 5.36 5.36 <5.32> [dB] 2004-07-05 10:02:13: MAIN step 8: 8.74 9.02 9.10 9.25 <9.03> [dB] 2004-07-05 10:02:13: SUBB step 1: 1.43 1.15 1.42 1.47 <1.37> [dB] 2004-07-05 10:02:13: SUBB step 2: 2.51 2.46 2.73 2.85 <2.64> [dB] 2004-07-05 10:02:13: SUBB step 4: 4.74 4.96 5.22 5.28 <5.05> [dB] Post EMC measurement:2004-07-07 16:43:09: MAIN step 1: 1.42 1.56 1.39 1.59 <1.49> [dB] 2004-07-07 16:43:09: MAIN step 2: 2.55 2.72 2.51 2.58 <2.59> [dB] 2004-07-07 16:43:09: MAIN step 4: 5.16 5.37 5.33 5.34 <5.30> [dB] 2004-07-07 16:43:09: MAIN step 8: 8.80 8.96 9.06 9.14 <8.99> [dB] 2004-07-07 16:43:09: SUBB step 1: 1.50 1.14 1.43 1.48 <1.39> [dB] 2004-07-07 16:43:09: SUBB step 2: 2.59 2.44 2.73 2.83 <2.65> [dB] 2004-07-07 16:43:09: SUBB step 4: 4.84 4.93 5.21 5.23 <5.05> [dB]►Conclusion: No significant changes measured.11/248PET-01 (Comb analysis)The performance verification was done with the internal comb generator. Measurement accuracy: Efficiency app. 5% / Resolution ±0.1 MHz / center pixel 1 Pre-EMC measurement:2004-07-05 10:02:14: Thermistor 1 (CCD) 22.39 °C2004-07-05 10:02:14: Thermistor 2 (Laser) 24.83 °C2004-07-05 10:02:14: Thermistor 3 (ADC Board) 26.65 °CPost-EMC measurement:2004-07-07 16:44:04: Thermistor 1 (CCD) 24.95 °C2004-07-07 16:44:04: Thermistor 2 (Laser) 27.90 °C2004-07-07 16:44:04: Thermistor 3 (ADC Board) 31.67 °C► Conclusion: No significant changes of subband efficiency. The small variation of the efficiency and the center channel is probably caused by the temperature difference.12/249CS on power lines / common and differential modeA range between 30 Hz to 50 MHz was tested at discrete frequencies.The test procedure PET-07 (see AD-01) was used to determine the impact of a synchronous distortion for the RMS value of the 4-8 GHz baseline (Sig-Ref)/(Ref-Zero). The test setup is described in AD-03 and AD-04.Figure 3: RMS value of the baseline for power line distortions in commonmode at various frequencies (integration time was 2 sec). Theblue line marks the result of the reference measurement.Figure 4: RMS value of the baseline for power line distortions in differentialmode at various frequencies (integration time was 2 sec). The blueline marks the result of the reference measurement.13/24►Conclusion: No baseline distortion measured for the common mode distortions. A 10% increase of the baseline RMS was visible in the range 1-10 kHz for the differential mode test.14/2410CS on signal lines / common modeA range between 30 Hz to 50 MHz was tested at discrete frequencies. The impact on the Data/Command and RF interface was verified together.The test procedure PET-07 (see AD-01) was used to determine the impact of a synchronous distortion for the RMS value of the 4-8 GHz baseline (Sig-Ref)/(Ref-Zero). The test setup is described in AD-03 and AD-04.Figure 6: RMS value of the baseline for signal line distortions in common modeat various frequencies (integration time was 1 sec). The blue line marksthe result of the reference measurement.► Conclusion: No baseline distortions measured.15/2411CS transients on power linesThe test procedure PET-07 (see AD-01) was used to determine the impact of the transients on the RMS value of the 4-8 GHz baseline (Sig-Ref)/(Ref-Zero). The test setup (described in AD-03 and AD-04) did not allow a synchronous distortion. In addition to the baseline analysis the CCD zero level was measured to improve the sensitivity of the verification.11.1Common mode16/2417/2411.2Differential mode18/24►Conclusion: No baseline and CCD zero level distortions measured.19/2412RS with E-fieldA range between 14 kHz to 18 GHz was tested at discrete frequencies.The test procedure PET-07 (see AD-01) was used to determine the impact of a synchronous distortion for the RMS value of the 4-8 GHz baseline (Sig-Ref)/(Ref-Zero). The test setup is described in AD-03 and AD-04.Figure 11: RMS value of the baseline for E-field radiation with 2V/m RMS at variousfrequencies (integration time 1 sec). The blue line marks the result of the referencemeasurement.A further analysis was done to investigate if spurious signal appear in the spectra. Therefore the maximum level of a single frequency pixel in each 4-8 GHz spectra was divided by the RMS value of the baseline. The radiated E-field of 2V/m does not generate any spurious signals above 5 times the RMS value at the measured frequencies.20/24Figure 12: RMS value of the baseline for E-field radiation with 2V/m at various frequencies(integration time was 1 sec). The red line marks the 5 sigma limit.In order to determine the RS limit of the WBS an increased integration time was used. The RMS of the baseline is far away of the theoretical value since the stability of the spectrometer was not sufficient. Nevertheless it was possible to measure some spurious signals at 4.5 / 5.5 / 6.5 / 7.5 GHz.21/24►Conclusion: No baseline distortions and spurious signals visible with 1 secintegration time. An increased integration time indicated that the RS sensitivity is peaked at 5.5 GHz.22/2413RS with H-fieldA magnetic field of 140dBpT in the range 30 Hz – 50 kHz was applied at discrete frequencies. The test procedure PET-07 (see AD-01) was used to determine the impact of a synchronous distortion for the RMS value of the 4-8 GHz baseline (Sig-Ref)/(Ref-Zero). The test setup is described in AD-03 and AD-04.Figure 14: RMS value of the baseline for H-field radiation with 140dBpT at various frequencies(integration time was 1 sec). The blue line marks the result of the referencemeasurement.►Conlusion: No baseline distortion measured.23/2414Summary of test results∙WBS fully functional after testing.∙Negligible changes of subband ripple/efficiency/center channels measured.This is probably due to different temperatures of the WBS during the pre/post test.∙No baseline distortions and spurious signals measured during the RS test with 1 sec integration time. The distortion was applied only during theSig-measurement.∙CS in common mode of power and signal line did not cause any distortion of the measured spectra. The distortion was applied only during theSig-measurement.∙Small baseline distortions are visible during the CS test of the power lines in differential mode. The baseline RMS increase of app. 10% is within the testlimit.The WBS passed the EMC test successfully.24/24。