[KA, GV]

Summary:

1. New cross connect system for splicing the fast BIO signals for whitening switching to the P2 connectors was installed and tested at 1Y2.
2. It passed a first round of tests. 😁 
3. As of now, I believe all the necessary electrical connections have been made at 1Y2/1Y3, and we are ready for testing the c1iscaux system.

Details:

1. We did some testing in the office area, and found several wiring mistakes. These were all rectified. Attachment #1 is an accurate reflection of the implemented wiring scheme (softcopy in the 40m google sheets area). Be aware that the IDC 50 pin connector pin-out is tricky, and you have to be aware of the difference between male/female connector when looking for this pin-out on the internet.
2. In order to facilitate further testing, we re-routed the ADC0 SCSI cable that was unplugged on the overhead cable tray, and plugged it back into the c1lsc expansion chassis. This action necessitated a reboot of the vertex FEs, but everything came back alright.
3. Did some general neatenign and strain relieving. Removed a few existing cross-connects to make space for our new terminal blocks.
4. Attachment #2 shows the layout of the terminal blocks. Note the unusual (vertical) order of the orange terminal blocks.
5. The final integrated CDS test done was the following:
   • Set whitening gain for channel under test to 45dB, so that the dark noise level is boosted to a measurable level such that a change can be seen with the whitening enabled/disabled.
   • Compare the ASD of the signal between 30-100 Hz with the whitening engaged/disengaged.
   • Example result shown in Attachment #3.I believe the whitening is 15:150 (z:p) 

Tomorrow:

1. Recover POX/POY locking,.
2. ...