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 Wed Jul 8 19:42:37 2009, Clara, Update, PEM, Bonnie moved to PSL, getting some coherence with the PMC_ERR channel 
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 Thu Jul 9 02:18:09 2009, rana, Update, PEM, Bonnie moved to PSL, getting some coherence with the PMC_ERR channel
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Message ID: 1727
Entry time: Thu Jul 9 02:18:09 2009
In reply to: 1726
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| Author: |
rana |
| Type: |
Update |
| Category: |
PEM |
| Subject: |
Bonnie moved to PSL, getting some coherence with the PMC_ERR channel |
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My guess is that we need a different acoustic strategy. The microphones are mainly for high frequencies,
so you should not expect any coherence with MC_L (or even better, MC_F) below 100 Hz. I expect that the
main coherence for MC_F will come from the PSL in that band.
After subtracting that one out, we should look at the signal from the lock of the X or Y arm, and see
if we can nail that by putting a mic right above the AS table (leaving enough room to take the lid off).
If that works OK, we can find a spot under the lid and se if it gets better. |