[hpsdr] Page 37 of the ANAN-10 Users guide shows proper pinout

[David R. Wilson]

Thanks Ken,

It was John that had the question.  I didn't go after the documentation,
just wanted to make sure he didn't blow anything up.  Best I remember
the audio on that and the 100 had both connections being driven, neither
at ground potential.  When the documentation says these are balanced
outputs that needs to be thought about a bit.  If either terminal gets
grounded chances are almost certain hardware will self destruct.

Dave
KU4B


On Wed, 2013-07-31 at 18:56 -0500, Ken N9VV (Win-7/64) wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Hi I have limited email and wanted to get this message
> to John Ackermann and Dave Wilson.
> 
> Bill KC9XG and I worked for over a week to get the proper pinout of J16 
> for the standard IDC ribbon cable. We finally created a nice table on 
> Page 37 of the ANAN-10 Users Guide that shows exactly where each 
> output/input is located. [unfortunately, the IDC pin designations were
> not used on the Hermes PCB].
> 
> I placed the guide on my webserver:
> http://www.n9vv.com/ANAN-10-Users-Guide.pdf
> 
> I hope it helps sort out the speaker out lines.
> 
> On the standard Hermes board used in the ANAN-10, there is this note:
> "NOTE: The speaker jack contains the Left Channel speaker pair. The 
> Right Channel speaker pair is on pin 12 and Pin 13. These are balanced 
> outputs."  -- there was a warning in the document not to ground either
> of those pairs or damage could occur to an Op-Amp.
> 
> Note: a surprise to me was that there is no "balanced MIC input"
> but only a *RIGHT* channel line-level input. Left line-in
> was not implemented for those using Audio Racks.
> 
> Perhaps Bill KC9XG can also help you clarify if there is a specific
> polarity associated with the balanced speaker output. I do not recall
> seeing that on the schematic.
> 
> GL de Ken N9VV
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