Camilla, Sheila
We went to ISCT6 to align the 1811 that we had installed in the AS air path this morning in the maintence window. We were able to align onto the diode, there is about 200 uW of 1064 arriving on ISCT6 and about 130uW of that is incident on the diode (which is overfilled with the lens we currently have). We were able to see the 3.125MHz signal on the RF analyzer, but it is only about 20dB above the noise, and we didn't see any of the interesting features that Daniel and I saw on the OMCDCPD spectrum at these frequencies last week.
We also attempted to measure a transfer function from the LO loop to this signal demodulated using the HD demod, however the signal is too noisy for us to get any kind of meaningful measurement.
One thing to note: Before we went to the floor I opened the AS air beam diverter. I expected that this would take us out of observe. Corey took us out of observe manually a few seconds later. I tried to investigate why this didn't take us out, these beam diverter channels are on ECATPLC1 in SDF. There are only 5 beam diverter channels in SDF, although there are more channels that coming from the beam diverter. Perhaps we need to update the channel lists used by SDF?
For the beam diverter my guess is that the open and close commands are push buttons that are released after you pressed them. So, they are alwasy in the inactive state, unless you want to change state. The state of the beam diverter is through readback channels that are normally not monitored. We could make the state readback channels writable, which would include them in the SDF list. Even so, you woudldn't really be able to write to these channels, since they will be overwritten immediately by the beam diverter code.