christopher.biwer@LIGO.ORG - posted 16:12, Wednesday 30 September 2015 - last comment - 19:35, Wednesday 30 September 2015(22124)
Summary of injection tests with PCAL and DARM
J. Kissel, C. Biwer, S. Karki We tested using PCAL as a hardware injector. We did 3 injections into the traditional H1:CAL-INJ_TRANSINET_EXC used for hardware injections in the past and 3 into H1:PCALX_SWEPT_SINE_EXC to test using PCAL for hardware injections. All injections used the 15Hz test waveform from aLog 21838. The first injection into H1:CAL-INJ_TRANSINET_EXC was successful. The command line was: awgstream H1:CAL-INJ_TRANSIENT_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d >> 2015-09-30_PCALInjTest_DARMCTRLEXC.txt We then tried an injection into H1:PCALX_SWEPT_SINE_EXC but it was unsuccessful because the injection channel list for the hinj account was restricted and did not include this channel. The command line was: awgstream H1:CAL-PCALX_SWEPT_SINE_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d >> 2015-09-30_PCALInjTest_PCALINJ.txt D. Barker added H1:PCALX_SWEPT_SINE_EXC to the allowed excitation channels list for the hinj account and we had a successful set of injections: awgstream H1:CAL-PCALX_SWEPT_SINE_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d >> 2015-09-30_PCALInjTest_PCALINJ.txt awgstream H1:CAL-PCALX_SWEPT_SINE_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d >> 2015-09-30_PCALInjTest_PCALINJ_Trial2.txt awgstream H1:CAL-PCALX_SWEPT_SINE_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d >> 2015-09-30_PCALInjTest_PCALINJ_Trial3.txt awgstream H1:CAL-INJ_TRANSIENT_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d >> 2015-09-30_PCALInjTest_DARMCTRLEXC_Trial2.txt We then tried another injection but NDS happened to fail as we tried the injection and the injection was unsuccessful: awgstream H1:CAL-INJ_TRANSIENT_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d >> 2015-09-30_PCALInjTest_DARMCTRLEXC_Trial3.txt The problem was quickly fixed and we set up to retry the injection. It was successful: awgstream H1:CAL-INJ_TRANSIENT_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d >> 2015-09-30_PCALInjTest_DARMCTRLEXC_Trial4.txt The logs are attached. The end times of the injections should be: DARM 1 1127683334.985681295 PCAL 1 1127683905.985681295 PCAL 2 1127684170.985681295 PCAL 3 1127684464.985681295 DARM 2 1127684765.985681295 DARM 3 1127685142.985681295 As we were doing the injections we made omega scans, they can be found in aLog 22123.
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I've recovered the injections by match filtering using the injection template. Label GPS time SNR chi-squared newSNR DARM1 1127683334.986 17.99 24.70 17.99 DARM2 1127685142.986 17.97 33.40 17.46 DARM3 1127685142.986 17.04 23.94 17.04 PCAL1 1127683905.986 9.61 44.27 8.48 PCAL2 1127684170.985 10.10 41.44 9.14 PCAL3 1127684464,986 10.54 73.52 7.48 It looks like PCAL injections were a bit quieter in SNR.
I see a factor of two missing in my transfer function measurement as well in the same direction that would produce low SNR through Pcal. Some clues but investigation ongoing.
The PCAL injections (numbers 2,3,4 in the set of 6) appear to be inverted, besides being too small by close to a factor of 2 -- see the attached plots. The ESD injections look rather good by comparison.
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