Original post by Ron W4LDE
If this question is inappropriate for the reflector I apologize but as
of last Friday 9-5-08 I started to experience significant noise (S-9) on all
bands from 160 through 15M with the lower frequencies much stronger. I
thought that it was due to power line noise but
If this question is inappropriate for the reflector I apologize but as
of last Friday I started to experience significant noise (S-9) on all
bands from 160 through 15M with the lower frequencies much stronger. I
thought that it was due to power line noise but it appears to be
intermittent in
AM
Subject: [digitalradio] Noise Reduction and the digital modes
Noise reduction on my old rig never did much. Now I have a new rig
the NR buttons actually appear to do some things. What about noise
reduction and the digital modes, is it really helpful? I did just
notice that with a Hell
Patrick Lindecker wrote:
Hello Andy and all,
I don't think NR must be a so good idea for digimodes. Because, it can
be seen as non-linear filter.
I disagree on the transfer function. It is an adaptive linear filter.
Since it does not mix two tones in the passband, it can't be nonlinear.
Message -
From: Robert McGwier
To: digitalradio@yahoogroups.com
Sent: Sunday, March 04, 2007 6:15 PM
Subject: Re: [digitalradio] Noise Reduction and the digital modes
Patrick Lindecker wrote:
Hello Andy and all,
I don't think NR must be a so good idea for digimodes. Because
Patrick Lindecker wrote:
Hello Robert,
TKS for the correction. I returned to my books. LMS filters are in
general linear (LMS-FIR), however they can also be in a recursive
structure (LMS-IIR).
Patrick, thanks for your reply. An IIR filter (with an FIR component
and a feedback
Noise reduction on my old rig never did much. Now I have a new rig
the NR buttons actually appear to do some things. What about noise
reduction and the digital modes, is it really helpful? I did just
notice that with a Hell QSO NR made the print more blurred. For other
modes I have not noticed
Anyone know what the signal is on 14071.944 ? It runs about S8 with
some qsb, and sounds like high speed clicking noise. Hope its not a
local problem. Mike K9HCK
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
Other areas of interest:
The MixW Reflector :
I don't know what it is, but I can hear it here in SW Wisconsin. It is
fairly weak on my ICOM 756 Pro 2 from a ground mounted Butternut
vertical and not moving the S meter.
On the waterfall, it looks like a groups of three carriers separated by
25 Hz or so, and several of these groups which
Maybe HELLscriber, does it look like a narrow signal on the waterfall?,
cant turn on the rig, still at the office but Hell sounds like CW to some.
Ron W4LDE
- Original Message -
From: mac2251 [EMAIL PROTECTED]
Date: Thursday, July 27, 2006 3:48 pm
Subject: [digitalradio] Noise
KV9U wrote:
I don't know what it is, but I can hear it here in SW Wisconsin. It is
fairly weak on my ICOM 756 Pro 2 from a ground mounted Butternut
vertical and not moving the S meter.
I can hear it here in SE Iowa. It just paused, then the rapidity of the
clicks picked up a bit.
--
Mike
I've noticed it too so it ain't local. Have no idea what it is.
73 Brad N1NPK
[Non-text portions of this message have been removed]
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
Other areas of interest:
The MixW Reflector :
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