Re: [Flexradio] Preselection & Noise Blanker

2007-04-12 Thread Bob McGwier
KA5MIR wrote: > Hello Bob, > GREAT! I'm not familiar with the terms "noise subtraction" but possibly it > is related to a phase reversal and a balancing out type of process? > If you add the phase reversed copy to the incoming signal, it eliminates the offending signal. It is your abilit

Re: [Flexradio] Preselection & Noise Blanker

2007-04-12 Thread Bob McGwier
KA5MIR wrote: > At my noisy qth, I have to use the noise blankers. This results in strong > signals OUTSIDE the filtered bandwidth, anywhere in the 96kc passband, > modulating the noise blanker INSIDE the filtered frequency range. It often > causes desired signals in the filtered range to be

Re: [Flexradio] Preselection & Noise Blanker

2007-04-12 Thread KA5MIR
Hello Bob, GREAT! I'm not familiar with the terms "noise subtraction" but possibly it is related to a phase reversal and a balancing out type of process? In any case, GREAT! Have I said that already? After going through power co negotiations and putting up with impulse noises for YEARS, t

Re: [Flexradio] Preselection & Noise Blanker

2007-04-12 Thread Bob McGwier
Maarten wrote: > Could the sampling of the Noise Blanker be done with another Sub RX? You > could park the Noise Blanker sampling Sub RX in a quiet section of the band. > > - Yes. In the new code being developed for dttsp, we are going to be training the code for the impulse response of the r

Re: [Flexradio] Preselection & Noise Blanker

2007-04-12 Thread KA5MIR
It would seem that a separate cheap built-in receiver like a broadcast band rcvr just for the noise blanker input could work and not affect the current Flex receiver. I take it from the lack of response to my post that this must not be a problem for many people, though. Thanks Maarten for

Re: [Flexradio] Preselection & Noise Blanker

2007-04-11 Thread Maarten
7 10:22 AM Subject: Re: [Flexradio] Preselection & Noise Blanker > At my noisy qth, I have to use the noise blankers. This results in > strong > signals OUTSIDE the filtered bandwidth, anywhere in the 96kc passband, > modulating the noise blanker INSIDE the filtered frequency range.

Re: [Flexradio] Preselection & Noise Blanker

2007-04-11 Thread KA5MIR
At my noisy qth, I have to use the noise blankers. This results in strong signals OUTSIDE the filtered bandwidth, anywhere in the 96kc passband, modulating the noise blanker INSIDE the filtered frequency range. It often causes desired signals in the filtered range to be unreadable. I woul