participants:  Marco, Eleonora, Yuhang

- Filter cavity modulation:

Before Tektronix AFG3102 Fout=78MHz Ampl=1Vpp (Measured with HP 8563E Power 2.83dBm Fout+78.017MHz)

After DDS2 Board CH0 Fout=78MHZ Full scale output (Measured wit HP: 8563E Power after amplificator 13.6 dBm)

I put a 6 dBm SMA attenuator and I set the output at 1/2 scale after it I measure 4.6 dBm at 78.3 MHz

- Filter cavity PDH demodualtion:

Before provided by Tektronix AFG3102 Fout=78MHz Ampl=9.5 Vpp (the mixer was a class 23 Minicircuit ZAY-3)

After DDS2 board CH1 Fout = 78MHz Full scal output. I measure 6.43 dBm after the amplifier.

We replace the mixer with a Class 7 Mixer Minicrcuit ZAD-1-1+)

- GrMC reflection PDH demodulation:

Now DDS2 Board CH3 Fout=78MHz Full scale output. I measure 6.43 dBm after the amplifier.

Note that the CH2 of the DDS 2 Board is not working

Phase optimization

CH0 = 0

Ch1 = 135 deg (before was 125 deg)

CH2 = not working

CH3 = 175 deg