Kevin et al.,
I suffer from the same problem at my qth. The QRN on 6 is such that I
need to use the NB most of the time, but when strong signals appear
(anywhere) on the band, it becomes useless. If such a change in the NB
software is possible, it would certainly improve the operation here.
Of course, the best solution would be to resolve the noise at the
source, but that is a temporary fix because it seems a new noise source
appears as quickly as one is removed.
73, Bob K5SM
On 7/11/2010 7:12 AM, Kevin Hobbs wrote:
Hi Mark
I believe this problem is well known as it was discussed with Bob at the
Flex Dinner in Dayton ... I am pretty sure that I logged it as a feature
request / bug some time ago (along with others). I want / need the noise
blanker (they do work great) on 6 meters to get rid of noise garbage, but as
soon as the band opens I know it, as any CW beacon down in the sub-band
(50.060-080) will pump my noise floor wildly all the way up on 50.125 or
wherever. The only choice is to then turn off the blankers and live with the
higher noise floor which often covers up the weak signals that I was hoping
to work (multi-hop EU or other). I believe the solution is for Flex to
analyze a narrow (dead section) of the band or just out of band and base
noise blanker operation on that signal, not the average of everything found
in a 96KHz swathe (or whatever is currently done). So, I think there is a
solution, just not sure how high up on their priority list it is. But I know
that from talking with others, there are many of us that are anxiously
awaiting some improvement.
73 Kevin
-----Original Message-----
From: flexradio-boun...@flex-radio.biz
[mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Mark Lunday
Sent: Saturday, July 10, 2010 11:56 PM
To: 'Gerald Youngblood'
Cc: flexradio@flex-radio.biz
Subject: Re: [Flexradio] AGC pumping?
Thanks Gerald et al. Turning off the NB did the trick.
So..because the NB operates over the entire bandwidth..I don't fully
understand why that would make the noise floor jump due to strong adjacent
signals. Sorry I am sometimes slow on the uptake.
Mark Lunday, WD4ELG
Greensboro, NC FM06be
wd4...@arrl.net
http://wd4elg.blogspot.com
http://wd4elg.net
From: Gerald Youngblood [mailto:ger...@flex-radio.com]
Sent: Saturday, July 10, 2010 7:39 PM
To: Mark Lunday
Cc: flexradio@flex-radio.biz
Subject: Re: [Flexradio] AGC pumping?
Mark,
AGC operates only on the final filtered bandwidth so pumping from other
signals does not make sense. Do you have the noise blanker turned on? That
might do it since it operates on the entire bandwidth.
Gerald
Gerald Youngblood, K5SDR
President and CEO
FlexRadio Systems(TM)
13091 Pond Springs Road, #250
Austin, TX 78729
Phone: 512-535-4713 Ext. 202
Email: ger...@flex-radio.com
Web: www.flex-radio.com
Tune In Excitement (TM)
PowerSDR(TM) is a trademark of FlexRadio Systems
On Sat, Jul 10, 2010 at 5:56 PM, Mark Lunday<wd4...@triad.rr.com> wrote:
SDR 1.18.5 (have not had time to upgrade yet), F3K.
IARU HF championship. I notice that with a lot of strong signals, it seems
to be overwhelming the AGC. I have the preamp off, ACG settings don't seem
to matter and neither does the AGC-T setting. The symptom is that the
background noise seems to jump in according to strong SSB or CW signals
within the 96 kHz passband.
Any thoughts or comment?
Mark Lunday, WD4ELG
Greensboro, NC FM06be
wd4...@arrl.net
http://wd4elg.blogspot.com
http://wd4elg.net
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