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| 40m Log |
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 Thu Mar 12 01:33:21 2020, gautam, Update, LSC, Resuming locking activities 
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 Fri Mar 13 00:32:38 2020, gautam, Update, LSC, Some progress
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Tue Mar 17 01:22:03 2020, gautam, Update, LSC, Locking updates
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Thu Mar 19 03:33:28 2020, gautam, Update, LSC, More locking updates
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Message ID: 15278
Entry time: Tue Mar 17 01:22:03 2020
In reply to: 15273
Reply to this: 15281
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| Author: |
gautam |
| Type: |
Update |
| Category: |
LSC |
| Subject: |
Locking updates |
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Summary:
No real progress tonight - I made it a bunch of times to the point where CARM was RF only, but I never got to run a measurement to determine what the DARM_B loop gain should be to make the control fully RF.
Details:
- Touched up PMC alignment.
- There were very few BNC cables available at the rack near SW corner of the PSL table - the short BNC cables are NOT meant to be daisy chained to make long cables to run along the arm, I removed all those.
- Restored SR785 at LSC rack for CARM TF measurements.
- I was able to get the CARM UGF ~5 kHz, but everytime I was trying to run a DTT swept sine to measure the ratio of DARM_B_IN1 / DARM_A_IN1, the lock was lost - not sure if this is because of the excitation injected or something else.
- I'll probably give this another shot Wednesday eve.
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