R&D (FilterCavity)
NaokiAritomi - 20:06, Thursday 08 October 2020 (2236)
CCFC RF noise

[Aritomi, Yuhang]

We measured CCFC RF noise (before demodulation after amplification).

Setting of spectrum analyzer: RBW: 300kHz,VBW: 10kHz

We used 50:50 BS to pickoff CCFC error signal and pump green power is 42 mW.

Note that CCFC and CCFC FC unlock were measured with max hold while others are normal setting. I think that's the reason why the floor noise level in CCFC and CCFC unlock are a bit higher than TAMA PD noise level.

Images attached to this report
2236_20201008130626_ccfcrf20201008.png