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 Tue Dec 4 23:16:35 2007, tobin, Update, PSL, ISS
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 Wed Dec 5 17:49:57 2007, tobin, Update, PSL, ISS 
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Wed Dec 5 18:22:03 2007, tobin, Update, PSL, ISS dark noise
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Wed Dec 5 20:32:51 2007, tobin, Update, PSL, ISS dark noise
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Thu Dec 6 19:30:43 2007, tobin, Update, PSL, ISS dark noise - 60 Hz!
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Fri Dec 7 19:14:30 2007, tobin, Update, PSL, ISS dark noise - ground loop enlightenment
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Message ID: 171
Entry time: Wed Dec 5 20:32:51 2007
In reply to: 169
Reply to this: 177
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| Author: |
tobin |
| Type: |
Update |
| Category: |
PSL |
| Subject: |
ISS dark noise |
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The ISS dark noise is not coming from the PD heads; the spectrum is essentially unchanged when the PD is unplugged from the ISS. Did the input opamps both get semi-fried in the same way? (They worked so well when they were first installed.) What else changed? I'm baffled.  |