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Zach Notebook: Difference between revisions
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==8/23/2015==
1.) Pickoff efficiency is 1%. This was determined by having two photodiodes on each side of the pickoff and comparing the voltage readouts. Both reflections were focused onto the photodiode with a lens.
2.) Blue Photodiode 1 reads out a voltage that is 89% that of Blue Photodiode 2. This was determined by using a 50/50 (really 52/48 determined with power meter) non-polarizing beam splitter and comparing the outputted voltages. This difference could not be fixed by using the bias voltage or input current offset settings on the SRS570 amplifier.
==Undated==
1.) DAQ can have voltage offsets depending on grounding setup. Make sure this is checked for different setups.
3.) RF 3 jumps in power output every 5 dBm (i.e. at 0.0 dBm, -5 dBm, 5 dBm...). RF 1 does not. They were originally switched (RF 3 was RF 1) but we switched them because of the jump in power from the current RF 3. They are both Rohde & Schwarz SIMQ 038.
4.) RF generator/AOM needs to warm up after being turned on. It also needs to readjust after changing the dBm when the dBm setting is high (i.e. changing from 3 dBm to 5 dBm).
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