More Re: [TenTec] Orion redefines the meaning of ... AGC OFF
Bill Tippett
btippett at alum.mit.edu
Sat Feb 7 14:54:52 EST 2004
I wrote:
> Sinisa, there are TWO AGC's in Orion. One is
Analog AGC which CANNOT be turned off since it is
ALWAYS ON to protect overdriving the DSP's ADC with
signals stronger than ~S9+30.
Oops, that level is actually closer to S9+40:
"That means a receiver can handle signals from the noise floor to almost 40
dB over S9 without analog AGC. Above that level, analog AGC is still
necessary to maintain the linearity of analog circuits and to prevent
overload in the ADC hardware."
http://www.doug-smith.net/dspdynamics.htm
73, Bill W4ZV
More information about the TenTec
mailing list