[hpsdr] Pennylane problem (suspect hardware issue) - a few pointers needed

[Paul Fletcher]

OK a quick update. It's not a hardware problem. What threw me was the Penny 
card that seemed to behave was running an older version of firmware. 
Previously I was powering down HPSDR, changing cards, and powering back up 
and in this config Penny worked fine. When I started from cold PowerSDR 
complained about out of date Penny firmware so I updated it and now Penny 
shows the same problems as Pennylane. This means my Pennylane hardware is 
probably OK. Using the latest version of W5WC (1.9.3.4 9/18/11).

I haven't tried KISS yet as I need to arrange something to monitor the 
transmitted signal (the PSDR issue was detected in the monitored audio and 
also when recording pre-processed TX audio).

I should have more time tonight to do some more investigation - incidentally 
this is not related to TX RF power either - it does it at zero drive without 
any external PA.

Regards,
Paul M1PAF
----- Original Message ----- 
From: "Phil Harman" <phil at pharman.org>
To: "Paul Fletcher" <paul_fletcher at me.com>
Sent: Monday, September 19, 2011 1:56 AM
Subject: Re: [hpsdr] Pennylane problem (suspect hardware issue) - a few 
pointers needed


> Hi Paul,
>
> Please try the latest version of W5WC's PowerSDR. There was a bug in the
> PennyLane code that Doug has just fixed.
>
> Alternatively try the Unified version of KISS Konsole since I know that
> works fine with PennyLane.
>
> 73 Phil...VK6APH
>
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hi all,
>>
>> I think I have a problem with my Pennylane board. The RF side of things
>> seems to be working fine. However it looks like I have a problem on the
>> mic
>> input. I've substituted the board with a Penelope card and that work 
>> fine.
>> The issue is the mic audio is heavily distorted with a lot of noise. If I
>> select the line input the noise is still present (but obviously there is
>> no
>> mic audio). I have a Janus card that I could use to try to tie down the
>> problem but I can't remember if this needs firmware updating or not or if
>> it's just natively supported (I'm using Metis as the interface).
>>
>> Looking at the circuit diagram the mic input is fairly simple as it just
>> goes to the CODEC via a few passive components and then to the FPGA. I've
>> had a good look at the board under a Loupe and there is nothing
>> immediately
>> obvious in terms of manufacturing defects. It did work fine but has now
>> developed this fault. I don't think it's firmware related (running V1.4
>> Pennylane) but I can't remember if this has happened after I upgraded to
>> V1.4.
>>
>> Any suggestions welcome (oh and it's nothing to do with the mic or the
>> gain
>> settings either - the same setup and settings works fine with Penelope).
>>
>> 73 Paul M1PAF
>>
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>
>
> 


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