Daniel, Nutsinee
Here's a quick note of what we measured out there with the RF power coming in through (and monitored via) temporary cables. These RF power drive AOM1 and AOM2. There seems to be too much loss at Pmon2 compared to Pmon1 (almost 11 dBm loss versus 5dBm loss). The cable length going from CPL to Pmon are the same. The top RF input gets its power all the way from the CER while the bottom RF input gets its power from the SQZ rack. So the difference in the incoming RF power makes sense. Not sure if the factor of two difference coming straight out of the Cpl makes sense though.
Terry, Nutsinee
After realizing that the way the cables were hooked up didn't match the wiring diagram we decided to make it right once and for all. The output from the top RF amp used to drive AOM2, now it's driving AOM1 and the 2dB attenuator was taken off. The RF power measured on the table through the helix cable was 34 dB (2.5W), still within the max drive power allowed (2.9W). AOM1 (IntraAction ATM-200) diffraction efficiency is now 82%.
The bottom RF amp is now driving AOM2 (AA Opto Electronic MT200). The 6dB attenuator is still there. The power measured on the table was 33.2 dB (2.1W). The maximum power allows is 2.2W. The efficiency of AOM2 is still not great currently. The best we've had was 70%.