R. Cavalieri, B. Montanari, F. Nocera, G. Sposito

The installation of the new EOM (the 81.52 MHz,  in what follows and in the future 81 for short) started yesterday has been completed today.

The modulator is tuned for the nominal frequency and has a Q of 116. Its input impedance at the nominal frequency is almost purely resistive (phase = 7 deg) and slightly above 50 ohm.

As already done for the other modulation frequencies, two distinct signals are acquired: one is a copy of "the source" (i.e., it is an output of the RF Distribution unit following the LNFS), the second one is a pick off of the voltage driving the EOM Crystal (in this case, attenuated by 1760).

As per A. Masserot's request, the new situation is the following:

on the DEMOD_SN04
    CH00  the LNFS 6 MHz
    CH01  the LNFS 81 MHz
    CH02  the LNFS 56 MHz
    CH03  the LNFS 8 MHz

on the DEMOD_SN34
    CH00 the EOM 6 MHz
    CH01 the EOM 8 MHz
    CH02 the EOM 22 MHz
    CH03 the EOM 56 MHz

on the DEMOD_SN42
    CH03 the EOM 81 MHz