Hi,

That's a good point about the modem.  I have a lot of computer interference here from this machine.  We have an alarm system in the house with a remote
control, but the remote is virtually unusable due to the computer interference.  Also, the interferrence is a problem on the am band as well, so will try the sync
to see if that helps at all.

Most of the stations around here are quite a distance away.  They are clear enough most of the time, but are still weaker than if we were in a metropolitan
area, so any kind of interferrence is really noticable and often make the stations quite hard to listen to.

Don W6SMB

On Mon, 27 Sep 2004 20:23:29 -0400, Kenneth Lee wrote:

My cable modem causes lots of interference and I discovered I can =
eliminate
the interference by turning on the sync.  I noticed that the upper =
sideband
will be clear as a bell, and the lower sideband is unreadable.  This is =
true
on both the Sat800 and the 7600GR. Actually the upper sideband is clear =
with
sync on or off, but the audio just seems much better with the sync on. =20

Anyway, the interference isn't on all frequencies, but it enough to =
cause me
grief.  I usually turn off the modem, but often I have to leave it on
because others are using the internet while I'm trying to DX.


73, Ken -N5SWR


-----Original Message-----
From: Blind-Hams For blind ham radio operators
[mailto:[log in to unmask]] On Behalf Of Steve Dresser
Sent: Monday, September 27, 2004 7:50 PM
To: [log in to unmask]
Subject: Synchronous detection


Don,

Synchronous detection is one of those features that sneaks up on you =
because
it doesn't always seem to do much of anything.  Suddenly you notice that =

station that should be distorted just isn't.  I have noticed, though, =
that
the AGC doesn't work as smoothly when synchronous detection is on, =
probably
because the local oscillator keeps it from noticing the changing =
strength of
the carrier while the audio itself continues to fade up and down.  I =
don't
have any good sound technical data to support that theory; it's just my
amateur attempt to explain what I'm hearing.

Steve

On Monday 9/27/2004 18:24 Don Bishop wrote:

>Steve,

>Thanks for all the clarification.  I've heard people talking about the=20
>g radio but when I did a google search I couldn't find the actual specs =

>on the radio. Sounds like it may not really be what I'm looking for as=20
>I do have the 2010.

>I'll have to play more with the synchronous detection on the 2010.  We=20
>just moved out of the SF bay area and into the boondocs, so I'm getting =

>reintroduced to selective fading on the am band again.  <smile>

>Thanks for reminding me of the synchronous feature.

>Don W6SMB

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