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IOO (Laser Bench)
stefan.ballmer - 18:23 Thursday 31 May 2018 (5134) Print this report
PMC work
Matteo L, Stefan B.

- The PMC PZT drive cable (BNC to 2-pin LEMO) was connected incorrectly (BNC shield to LEMO shield instead of BNC shield to pin 2). We brought all 4 back for modifying tomorrow morning.
- Verified that the PMC servo box remote gains and switches worked. However the HV output of the box seemed to saturate. Even though we don't expect to use it, we shouldn't have the board saturate an unused channel. So we brought the servo box back for testing.

- Both Matteo and I tried to get the RF network analyser to spit out some reasonable transfer function below 1MHz - without success. Instead we ended up using Moku:Lab for transfer functions.
Comments to this report:
stefan.ballmer - 12:17 Friday 01 June 2018 (5145) Print this report
Fixed 2 of the 4 BNC-to-LEMO cables, i.e. moved the BNC shield to LEMO PIN 2 (leaving ground unconnected). The remaining 2 cables are marked as "WRONG PIN OUT".
stefan.ballmer - 12:22 Friday 01 June 2018 (5146) Print this report
Attached is a PDF including schematics (before any modifications) of all 6 boards of the TTFSS circuit. This box is intended for use as PMC servo.
Included are:
LIGO-D040105-C
LIGO-D040424-B
LIGO-D0901893-A.pdf
LIGO-D0901894-A.pdf
LIGO-D0901895-A.pdf
LIGO-D0901896-A.pdf
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kiwamu.izumi - 14:33 Friday 01 June 2018 (5150) Print this report

The attached are other important references.

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