Disconnect the RFPD signal and terminate with a 50 ohm to measure the noise floor of the cable delay method.
Starting time : 11-2-11-22-35-33 (yy-mm-dd-hh-mm-ss)
We are measuring the noise level of SR560 at low frequency ( ~10mHz) , with the gain 1e4, AC couple, low pass 30 Hz. The data is recorded by C3:PSL-GEN_DAQ14 channel.
The input is terminated with a 50 ohm terminator. The setup of the SR560 under test (S/N 02785) is the same as the one we are using now.
Tomorrow we will measure the noise level of the whole setup (SR560, cables, all mixers and amplifiers included.)