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| 40m Log |
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 Thu Mar 18 10:46:51 2010, Koji, Update, ABSL, PLL reconstructed
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 Thu Mar 18 12:27:56 2010, Alberto, Update, ABSL, PLL reconstructed
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Thu Mar 18 13:40:35 2010, Koji, Update, ABSL, PLL reconstructed
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Thu Mar 18 21:42:26 2010, Koji, Update, ABSL, PLL reconstructed
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Mon Mar 22 22:11:26 2010, Mott, Update, ABSL, PLL reconstructed 
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Mon Mar 22 23:37:32 2010, Mott, Update, ABSL, PLL reconstructed
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Tue Mar 23 18:44:46 2010, Mott, Update, ABSL, PLL reconstructed
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Wed Mar 24 03:58:18 2010, kiwamu, matt, koji, Update, Green Locking, leave PLL locked
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Wed Mar 24 04:22:51 2010, kiwamu, matt, Update, Green Locking, two NPRO PLL
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Wed Mar 24 14:52:02 2010, Alberto, Update, Green Locking, two NPRO PLL
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Wed Mar 24 15:59:59 2010, kiwamu, matt, Update, Green Locking, leave PLL locked
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Thu Mar 25 17:29:48 2010, kiwamu, mott, Update, Green Locking, PLL two NPROs
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Message ID: 2703
Entry time: Tue Mar 23 18:44:46 2010
In reply to: 2697
Reply to this: 2706
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| Author: |
Mott |
| Type: |
Update |
| Category: |
ABSL |
| Subject: |
PLL reconstructed |
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After realigning and getting the lock today, I tried to add in the SR785 to measure the transfer function. As soon as I turn on the piezo input on the PDH box, however, the lock breaks and I cannot reacquire it. We are using an SR650 to add in the signal from the network analyzer and that has worked. We also swapped the 20 dB attenuator for a box which mimics the boost functionality (-20 dB above 100 Hz, 0 dB below 6Hz). I took some spectra with the SR750, and will get some more with the network analyzer once Alberto has finished with it.
The SR750 spectra is posted below. The SR750 only goes up to 100 kHz, so I will have to use the network analyzer to get the full range. |
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