The 160 Hz notch is about 12 dB deep. It is about 40-50 Hz wide. It is
centered at 160 Hz.
The following pictures were made using the SDR-1000 console. On the
test tab I turned White Noise on and made it the input.
I connected my transmitter to a dummy load ;-).
I set the transmit filter to 50, 1000 Hz to expand the display ONLY.
I set the spectral averaging to 800ms (the point where no variation is
easily detectable).
http://home.comcast.net/~rwmcgwier/160HzNotchOff.jpg
http://home.comcast.net/~rwmcgwier/160HzNotchOn.jpg
THE CORRECT action of the notch is readily apparent.
Bob
N4HY
--
AMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats,
NJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman
Laziness is the number one inspiration for ingenuity. Guilty as charged!
