(BTW I wrote the following ~3 years ago before APF was changed from HOLD to
TAP on DUAL PB):
##
I use APF virtually all the time and never use RIT, SHIFT, etc. Just HOLD
DUAL PB to actuate APF and use the VFO to zero beat. COARSE (10 Hz
brian
Sent: Sunday, October 16, 2016 9:43 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] (K3) APF and selected bandwidth
Part of the problem with narrower bandwidths is making sure the signal is at
the APF peak.
I had fits trying to use APF with 200-400 Hz dialed in until I launched
Spect
craft-boun...@mailman.qth.net] On Behalf Of brian
Sent: Sunday, October 16, 2016 9:43 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] (K3) APF and selected bandwidth
Part of the problem with narrower bandwidths is making sure the signal is at
the APF peak.
I had fits trying to use APF with 200-400 Hz
Part of the problem with narrower bandwidths is making sure the signal
is at the APF peak.
I had fits trying to use APF with 200-400 Hz dialed in until I launched
Spectrogram and made sure the signal peak aligned with the APF peak.
Weak signals still show even when you have trouble hearing them
I seem to recall a recommendation to use a 400 Hz bandwidth with APF. In my
own exerience, narrowing DSP bandwidth much below this does not seem to
help APF function and rather muddies it.
Chip
AE5KA
On Sat, Oct 15, 2016 at 11:44 PM, Brian Hunt
wrote:
> On the other hand, when used in conjuncti
On the other hand, when used in conjunction with NR a wider DSP BW is desirable
since NR works on uncorrelated noise. Try:
BW= 700-1000 Hz,
NR= ~ 5-3
APF= ON
Great for pulling out weak signals on an uncrowded band. The NR settings of 5
and above mix processed and non-processed data so the APF has
The narrower the bandwidth, the better signal to noise.
That should answer your question :-)
Ken
At 07:39 PM 10/15/2016, Robert G Strickland wrote:
When using the APF, does it make a difference which bandwidth has
been selected? Or in other words, does APF work better on top of a
narrow or w
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