[Elecraft] P3 vs SDR-IQ

Fri Jul 31 09:08:29 EDT 2015

Thanks to all that replied to my post.

1. I am using Tracking mode and have Averaging set at 14. I want to see the
SSB pattern smoothly and not like an O'scope. I always slow the pattern
down to see clearly the transmitted bandwidth and treble/bass balance.

2. I do not use Fixed mode, If I am tuning up the band I want to see whats
ahead, in Fixed mode you can not.  But the scope pattern stays '"clean" in
Fixed mode, I wish it stayed "clean" in Tracking mode. When I say "clean" I
mean Averaging does not revert back to 0 while tuning.

John, ZS5J please note, on the Flex 6500 (and all 6000 series) that used
SmartSDR software, the panadapter is in Fixed Mode (to use a Elecraft term)
and can not be changed. This is the reason I no longer own a Flex 6000
series radio.

I have tried the various Auto Adjust parameters in Fixed Mode, but they do
not resolve my concern.

Joe  N9VX

-------------------------------------------------------
Hi Joe - Do you have signal averaging turned on to reduce the noise floor?
If you do, it has to stop averaging when the freq is being changed while
tuning, temporarily raising the noise floor slightly. It then re-starts
multi-pass averaging once you stop tuning. This is normal for signal
averaging. I run with averaging set =2 or 3 passes. When I tune I barely
notice a small increase in the noise floor. If you have a lot of local
pulse noise, you might want to turn on the P3s NB function to help. If
Averaging is turned off, I can't think of a normal scenario where the
noise floor
would go up when tuning the band. It certainly does not here.

Anyone else have any ideas?

73,

Eric
/elecraft.com/

On 7/30/2015 5:43 PM, Joe Word wrote:

I have been using a P3 with my K3 for the last two weeks and not happy with it's
  operation. I set the parameters to what I like, the patterns look
good, but when
I tune the screen fills with noise and you can not see the signals up
and down the band.
I am told the SVGA option does the same thing. Have owned radios from
Apache Labs and Flex
and used the SDR-IQ/SpectraVue and LP-Pan panadapters and all of them
do not have
this problem. On SDR-IQ/SpectraVue the pattern smears some when
tuning, but no noise.

Joe  N9VX

------------------------------------------------------------------
Has anyone compared the SDR-IQ as a panadapter with the P3?

I am using the SDR-IQ now but would like to be able to use my entire
computer screen for other displays during contests.

Dave N1IX
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