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 Wed Mar 14 05:26:39 2012, interferomter tack force, Update, General, daytime tasks
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 Wed Mar 14 14:09:01 2012, interferomter tack force, Update, General, daytime tasks
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Wed Mar 14 16:39:02 2012, Suresh, Update, General, REFL165 signal was not reaching demod board : Fixed 
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Message ID: 6418
Entry time: Wed Mar 14 16:39:02 2012
In reply to: 6412
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| Author: |
Suresh |
| Type: |
Update |
| Category: |
General |
| Subject: |
REFL165 signal was not reaching demod board : Fixed |
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| Quote: |
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The following tasks need to be done in the daytime tomorrow.
- Hook up the DC output of the Y green BBPD on the PSL table to an ADC channel (Jamie / Steve)
- Install fancy suspension matrices on PRM and ITMX [#6365] (Jenne)
- Check if the REFL165 RFPD is healthy or not (Suresh / Koji)
- According to a simulation the REFL165 demod signal should show similar amount of the signal to that of REFL33.
- But right now it is showing super tiny signals [#6403]
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The REFL165 RF output was not reaching the Demod board. The RF cable was disconnected. I fixed that and then I put in a RF signal at 165MHz , 1.66 mVrms at the test input (100Hz off set from the 165MHz LO) and saw that the 100 Hz demodulated signal was visible in the dataviewer.
Will complete the Optical RF power -> CDS counts calibration tomorrow morning. |