-----Original Message-----
From: F Feeney
Sent: Wednesday, December 14, 2011 1:03 PM
To: flexradio@flex-radio.biz
Subject: Re: [Flexradio] grunge on rx audio..
On 12/14/2011 12:48 PM, W1AEX - Rob wrote:
Which version of PSDR are you using Brett? Version 2.2.3 fixed a very big
issue with AM reception (AGC tracking the sideband energy rather than the
carrier energy) that was present in all the previous 2.x.x versions and
the later 1.x.x versions. That being said, I do notice what sounds like
peak distortion on some strong signals when using the AM mode. I do not
hear it when listening with other conventional AM receivers that I use.
Adjusting the AGC-T slider in PSDR doesn't seem to stop it, but I wonder
if adjusting the variables in the DSP AGC/ALC setup tab might address it.
The "max gain" and "attack" values might be a good starting point for
experimentation. Curiously, I never hear that distortion with PSDR when
listening to strong signals on the AM broadcast band, so it may have
something to do with selective fading and the way PSDR deals with it.
<snip>
I'd be curious what others may have noticed when operating AM or when
SW listening in the AM or SAM modes.
I use AM mode daily with a Flex 5000 and an amp and find that the received
signals sound absolutely great since the fix that came out in the latest
release. I use both AM and SAM modes on rx. The only distortion I hear is
from selective fading which SAM mode always takes care of as long as the
signal is strong enough. I do not listen to shortwave stations often but
when I do they sound just fine. AM is a pleasure to operate with the Flex.
73,
Harry
W0LS
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