[Daniel, Koji]

Taking the opportunity of lock loss, we want to the RF oscillator source and changed the modulation freq from 9.100230MHz to 9.100233MHz to see if we can move the 32.2Hz peak seen everywhere in the ISC. The 45MHz modulation frequency is supposed to move by 15Hz.

Using H1:LSC-MOD_RF45_AM_CTRL_OUT_DQ as the witness, no change was found.

Now the IFO is locking, so the mod freq was left shifted. Let's see if we find any change of peak locations in the DARM spectrum.