[1000mp] Low Audio with EDSP

[Cecil Acuff]

Doug the problem is most likely in the DSP system which is made up of two 
boards.  One handles the analog signals and probably the conversions to and 
from Digital and the other is the actual DSP processor.  I've had problems 
with mine after a transmit keydown with it doing anything from going to full 
volume white noise to passing no signal at all.  Only way to restore it to 
normal is to power the radio off and than back on and it's good until the 
next keydown or three. (it's random)  I have tried some RF isolation 
techniques on the wiring going into the DSP module and it has made no 
difference.  The cost of the parts from Yaesu is around $500 to replace both 
boards.  I plan to put the thing on the bench at some point to try to 
isolate the problem to one board or the other and replace only that board. 
May even consider repair if it's the Analog portion of the DSP system.

For now I just don't use the DSP system unless I am just listening to a QSO 
or some SW broadcast station while working at the work bench.

Yours may be a little different since you are having low audio all the time 
with it switched in...maybe a signal routing problem.  I'd be on the bench 
with it using a scope to look at the receive signal paths through the 
thing....

Also through the setups you can select whether you want to use conventional 
analog detectors or DSP detection....have you switched between those?  You 
still have DSP functionality while using standard Analog detection 
methods...

Hope that gets the signal to noise radio on your question up a bit....

Cecil Acuff
K5DL


----- Original Message ----- 
From: "Doug Renwick" <ve5ra at sasktel.net>
To: "Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Friday, December 01, 2006 8:36 AM
Subject: [1000mp] Low Audio with EDSP


> The replies to my earlier post are the same signal strength out of
> my EDSP...zero.  Surely someone has experienced this problem before
> and found a solution.  I am still trying to get through to Yaesu
> technical
> support but that may take time.  They take your phone number a promise
> to return your call, which they don't.  At least Yeasu parts will answer
> your
> call and e-mails.
>
> Subject: Low Audio with EDSP
>
> Has anyone discovered a fix for the low audio output
> with EDSP?  Several master CPU resets did not fix the
> problem.
>
> Doug
>
>
>
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