Hi all. I have an old signal generator (HP 8656B) that only goes down to -127dBm. However, I would like to do measurements at lower levels than this, down to maybe -137dBm. Can I just connect a 10dB attentuator to the output of the signal generator and then subtract from the output power shown on the display? Seems like I can, but maybe its not that easy.
Thanks!!!!!!!!!!!!! Ben