Re: [Elecraft] [k3] NB & Chirp [+ general discussion of DSP vs. IF noise blanking]

2009-12-09 Thread Lyle Johnson
The DSP NB causes some artifacts at its higher settings. Note that the DSP NB works by signal substitution while trying to maintain frequency rather than just "blasting a hole" in the signal stream. 73, Lyle KK7P __ Elecraft mailing l

Re: [Elecraft] [k3] NB & Chirp [+ general discussion of DSP vs. IF noise blanking]

2009-12-08 Thread Duncan Carter
Is the DSP blanker input level also subject to AGC? Duncan, W5DC Wayne Burdick wrote: > Wes, > > The DSP NB causes some artifacts at its higher settings. This is an > unavoidable side effect of signal processing. > > The DSP NB is applied after the crystal filter, so the bandwidth is > alrea

Re: [Elecraft] [k3] NB & Chirp [+ general discussion of DSP vs. IF noise blanking]

2009-12-08 Thread Wayne Burdick
Wes, The DSP NB causes some artifacts at its higher settings. This is an unavoidable side effect of signal processing. The DSP NB is applied after the crystal filter, so the bandwidth is already constrained, removing some of the inherent characteristics of noise pulses, including their rise