Hi, In the process of measuring phase noise with a 'demphano' gear, I am a bit reluctant to connect my 8560E in DC mode to get 30 Hz low frequency sensitivity: the SA input is very sensitive to DC voltage and may be destroyed by a voltage larger than 200mV.
So with a LNA having no blocking DC output I would like to know the best way to protect the SA. I suppose that putting a 100µF capacitor between LNA and SA is not especially a good idea as a charged capacitor to DC rail may have the same effect that no caps at all. I am looking for some advice in that domain to pursue phase noise measurements, for now I connect the SA with a caution after PLL lock and measuring the SA input with a DC voltmeter before switching to DC SA input but this mode of operation is a bit frightening. Any idea ? Regards Loïc _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
