[Ham-Mac] Stuck Audio Input Level slider using the USB Audio CODEC input

[Jack Brindle]

OK, so I did a bit of investigating. The Signalink USB uses a TI/Burr  
Brown PCM2904 USB codec. It's pretty much an all-in-one solution, and  
a rather nice one. According to the data sheet, it does not have an  
attenuator in the analog front-end. Thus CocoaModem is behaving  
exactly the way it says it should. I have now observed the exact same  
behavior with my Signalink, and, like Tim, believe it is working just  
fine, especially since I can copy all sorts of signals with mine.

Now if I can just find time to get it going in transmit mode with my  
K2. After all, I have had the Signalink USB for a year... ;-)


On Jan 20, 2008, at 3:36 AM, Tim McLeod wrote:

> I observed the same thing as Dick with the SL USB but do not  
> believe it is a
> problem.  My old setup used an iMic adapter along with the original SL
> interface.  The slider worked because the iMic adapter has a software
> adjustable input attenuator.
>
> The SL USB does not have a software adjustable input attenuator, so  
> the
> control is disabled.  Just use the level controls on the SL face  
> plate and
> everything works fine.
>
> 73 - Tim
>
>

- Jack Brindle, W6FB
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