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ID Date Author Type Category Subject Text   8859   Tue Jul 16 17:02:41 2013 Alex Cole Configuration Electronics AS Table Additions  [Eric, Alex] We added our reference photodetector (Newport 1611, REF DET) to the southern edge      8862   Wed Jul 17 11:13:36 2013 Alex Cole Configuration Electronics AS Table Additions [Eric, Alex] For the RFPD frequency response project, we routed the fiber that will connect our      8863   Wed Jul 17 16:15:42 2013 Alex Cole Configuration Electronics AS Table Additions [Eric, Alex] We decided that the POY Table would be a better home for our REF DET (Newport      8870   Thu Jul 18 15:34:15 2013 Alex Cole Update Electronics PD Frequency Response Update  [Eric, Alex] Our RF Switch arrived today, and we mounted it in rack 1Y1 (1st attachment).       8940   Tue Jul 30 16:21:46 2013 Alex Cole Update Electronics Photodetector Input Modulation  [Eric, Alex] We successfully used our system to modulate the input to a single photodetector.      8947   Wed Jul 31 17:02:17 2013 Alex Cole Update Electronics Preliminary Photodetector Frequency Reponse Measurements [Eric, Alex] We used our setup from yesterday (elog #8940) to measure transimpedance measurements      8955   Thu Aug 1 18:55:20 2013 Alex Cole Update Electronics Preliminary Photodetector Frequency Reponse Measurements                                8971   Tue Aug 6 12:43:23 2013 Alex Cole Configuration Electronics AS Table and Rack 1Y1 Additions For the photodetector frequency response project, I finished the construction of our baluns chassis and mounted it in rack 1Y1      8979   Wed Aug 7 15:51:53 2013 Alex Cole Configuration Electronics RF Switch Change For the photodetector frequency response project, our new RF Switch Chassis (NI pxie-1071) arrived today. I took the switches out of      8990   Fri Aug 9 16:49:35 2013 Jenne, manasa Update Electronics Post-vent alignment cont'd - RFPDs Notes to the fiber team: I am aligning beam onto the RFPDs (I have finished all 4 REFL diodes, and AS55),      9004   Tue Aug 13 11:40:19 2013 Alex Cole Summary Electronics RFPD Demod Filter Frequency Response Measurement  For the RF PD Frequency Response Measurement project, we get each PD signal from the "PD RF Mon" output of      9005   Tue Aug 13 11:54:40 2013 Alex Cole HowTo Electronics RF PD Fiber-Coupled Laser Operation This post pertains to the fiber-coupled diode laser mounted in rack 1Y1. To turn the laser on, first turn      9006   Tue Aug 13 13:30:41 2013 Alex Cole Configuration Electronics Cable Routing  I routed cables (RG405 SMA-SMA) from several demodulator boards in rack 1Y2 to the RF Switch in rack 1Y1 using the overhead      9059   Fri Aug 23 21:01:38 2013 Alex Cole HowTo Electronics Automated Photodetector Frequency Response System  This post describes how to use the Automated Photodetector Frequency Response System.      9062   Mon Aug 26 18:55:18 2013 Jenne Configuration Electronics putting together a 110 MHz LSC demod board for AS I have modified one of the spare demod boards that was sitting above the electronics bench (the one which was unlabeled - the      9067   Mon Aug 26 20:13:17 2013 rana Configuration Electronics putting together a 110 MHz LSC demod board for AS                                9069   Tue Aug 27 15:31:48 2013 Jenne Configuration Electronics putting together a 110 MHz LSC demod board for AS                                9071   Tue Aug 27 17:32:52 2013 Jenne Configuration Electronics putting together a 110 MHz LSC demod board for AS I measured the phase split between the I and Q signals of my AS110 board.  To do so, I plugged the board into an empty      9072   Tue Aug 27 18:21:35 2013 Jenne Configuration Electronics 110 MHz LO options As I see it, we have a few options for getting the 110 MHz LO to both the POP110 and AS110 demod boards.        9073   Tue Aug 27 18:58:52 2013 Koji Configuration Electronics 110 MHz LO options - Do we have an appropriate amplifier? - True challenge could be to find a feedthrough for the new port. (or to find      9095   Mon Sep 2 16:46:32 2013 Jenne Update Electronics RF distribution box is on the bench I have pulled the RF distribution box out of the rack, so I can look at it, and modify it to have 2 110 MHz spigots. I'm going to      9096   Mon Sep 2 18:06:21 2013 Jenne Update Electronics RF distribution box: 110 MHz LO options After scrounging for parts, and opening up the box, I have modified my proposal to the following:      9099   Tue Sep 3 21:08:13 2013 Jenne Update Electronics RF distribution box: 110 MHz LO options The RF distribution box is still on the bench, so again, don't      9100   Tue Sep 3 21:10:36 2013 Jenne Configuration Electronics putting together a 110 MHz LSC demod board for AS                                9101   Wed Sep 4 16:06:40 2013 Jenne Update Electronics RF distribution box: Reinstalled I have reinstalled the RF distribution box, as well put in the AS110 demod board.  I plugged everything back in, and turned      9106   Wed Sep 4 21:44:54 2013 Not Jenne Update Electronics RF distribution box: Reinstalled Temporary fix for the switch: give a bit of oil to the button Permanent fix: buy better switches.      9208   Sun Oct 6 22:27:35 2013 rana Frogs Electronics MC3 LL sensor cable was loose I noticed that the MC3 LL sensor was apparently dead according to its suspension screen. Since it was only the fast ADC channel and      9350   Tue Nov 5 19:50:07 2013 manasa Update Electronics IOO rack +/-5V power supplies The power supply to the ADC box on the IOO rack (that reads the beat I & Q signals) was pulled out because it did not run through      9356   Wed Nov 6 15:59:41 2013 manasa Update Electronics IOO rack +/-5V power supplies                                9377   Wed Nov 13 18:37:19 2013 rana Configuration Electronics DAC available in c1lsc IO chassis for DAFI        9563   Tue Jan 21 19:41:59 2014 Jenne Update Electronics RF distribution box power button fail Rana, Gabriele and I are trying to measure the FSR of the PRC (elog about that later), and we turned off the power to the RF generation      9566   Wed Jan 22 16:36:45 2014 ericq Update Electronics RF distribution box power button fail                                9637   Fri Feb 14 02:09:55 2014 ericq Update Electronics Transmon QPD whitening  [Quick post, will follow up with further detail later. Excuse my sleepy ELOG writing]      9642   Mon Feb 17 20:35:19 2014 ericq Update Electronics Transmon QPD whitening My apologies for all of that crap I left at the Y-end... I cleaned the rest of it up today.       9661   Mon Feb 24 13:21:00 2014 Jenne Update Electronics Measured REFL165 demod board I measured the REFL 165 demod board's I/Q separation.   Our 11MHz signal is currently 11.066092      9666   Mon Feb 24 17:59:31 2014 RANA Update Electronics Measured REFL165 demod board    Demod boards should be at 90 deg, not 82.7 or 12 or       9716   Tue Mar 11 15:19:45 2014 Jenne Update Electronics High gain Trans PD electronics change As part of our CESAR testing last night, we had a look at the noise of the 1/sqrt(TR)      9720   Tue Mar 11 19:07:24 2014 ericq Update Electronics High gain Trans PD electronics change Speaking of the whitening board, I had neglected to post details showing the the whitening was at least having a positive      9823   Thu Apr 17 16:04:40 2014 Jenne Update Electronics High gain Trans PD electronics change    I have made the same modification to the Yarm trans PD whitening board as was      9828   Fri Apr 18 09:40:28 2014 Steve Update Electronics it is a kick 10 days of on-off glitching?   It is a kick. The LSC is off, so it must be the ALS      9991   Sat May 24 22:56:57 2014 Jenne Update Electronics Amplifier removed from BeatX path I just realized that I forgot to elog this, but yesterday afternoon I bypassed the amplifier in the BeatX path, and now the X beatnote      9992   Mon May 26 07:59:23 2014 Koji Update Electronics Amplifier removed from BeatX path And the out-of-loop level of the ALSX compared with the previous measurement is ...?      9995   Tue May 27 11:58:45 2014 Jenne Update Electronics Amplifier removed from BeatX path Sorry, I had been in a hurry when I worked on this last week, and again when I wrote the elog, but I wanted to at least put in      10008   Mon Jun 9 09:51:11 2014 Sai Akhil Update Electronics Frequency Error Measurement of UFC-6000 RF Frequency Counter  Motivation:    To test the precision of Mini-Circuits Model UFC-6000      10009   Mon Jun 9 10:55:48 2014 Nichin Summary Electronics BBPD D1002969-v8 transimpedence measurement My SURF week-1 work...      10012   Mon Jun 9 16:55:31 2014 Koji Summary Electronics BBPD D1002969-v8 transimpedence measurement How is the modulation depth assumed in the calculation? If you don't know the modulation      10034   Thu Jun 12 16:56:31 2014 Nichin Update Electronics PD Inspection Normal 0      10036   Fri Jun 13 11:33:55 2014 Akhil Update Electronics Characterization of UFC-6000 RF Frequency Counter  Goal: To characterize the Mini-Circuits RF FC (Model UFC-6000) and plot Bode Plots      10037   Fri Jun 13 18:16:00 2014 Nichin Update Electronics Changes to the PD frequency response measurement system      10058   Wed Jun 18 15:25:06 2014 Nichin Update Electronics BBPD Transimepedence plot  Motivation:

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