On Dec 9, 3:46*pm, "Michael A. Terrell"
wrote:
....snip...
* *A 0 dB or higer signal will overload the front end of a FM radio. O
dBM is 1000 microvolts @ 75 Ohms. FM radios are supposed to work at full
quieting 10 microvolts. *Some of the -20 dB taps were labeled as FM Taps
and were supposed to have a bandpass filter on the output port but none
of the ones I tested in the lab did.
....snip...

being a bit pedantic,
0 dBm in a 75 ohm system is 273,861 microvolts rms