[hpsdr] JTAG continuity

[Chris Smith]

Hmmm... Strange. I didn't quote my own email so I don't know why the quote bar on my 2nd paragraph. Gremlins!

Chris

On 21 Nov 2009, at 09:51, Chris Smith wrote:

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> 
> Pete
> 
> I wasn't aware that there was such a restriction.
> 
>> From time to time I tinker with an old Elektor SDR QSD board (May 2007). The built-in sound card on my motherboard suffers from cross-talk between line out and line in. As a consequence, when I try using the sound card to resolve I/Q input from the Elektor SDR, there is an unholy mess. So, as I have a Janus board which is doing sterling service as a spare part at a wedding, I thought I could press that into service as an external sound card device.
> 
> I would not be using Mercury/Penny at the same time so Ozy would only have one duty to perform, that of taking input from Janus and passing it to the VCP driver for the G8JCFSDR software. However, if this is not possible, I won't bother as it's only a peripheral activity.
> 
> Roland is correct in that to perform F/W updates in situ the JTAG bus needs to be continuous, hence the plug in slot #4. Otherwise this is not required.
> 
> Cheers
> 
> Chris
> G4NUX
> 
> 
> On 20 Nov 2009, at 22:55, n3evl wrote:
> 
>> I was under the impression (from somewhere) that janus could not be used if atlas already has the ozy/penny/mercury combination.  Is this correct, and if not, to what use are you putting janus?
>> 
>> Also, I've run with ozy/penny/mercury in a variety of slot positions  with/without gaps (now constrained by the plate) and not had any problems.  What's this I'm hearing about plugs in empty slots?  Under what conditions is this plug needed?
>> 
>> Pete
>> 
>> 
>> 
>> roland etienne wrote:
>>> ***** High Performance Software Defined Radio Discussion List *****
>>> 
>>> Hi Chris,
>>> 
>>> Yes, you are right, and you need to put last jtag on Janus, JP12.
>>> 
>>> You can find a two-tone test in Power-SDR in setup --> test.
>>> 
>>> 73, Roland F8CHK.
>>> 
>>> 
>>> -----Message d'origine-----
>>> De : hpsdr-bounces at lists.openhpsdr.org
>>> [mailto:hpsdr-bounces at lists.openhpsdr.org] De la part de Chris Smith
>>> Envoyé : vendredi 20 novembre 2009 12:41
>>> À : HPSDR list
>>> Objet : [hpsdr] JTAG continuity
>>> 
>>> ***** High Performance Software Defined Radio Discussion List *****
>>> 
>>> Hi
>>> 
>>> Having installed my Atlas/Ozy/Mercury/Penny combo in Pandora behind the
>>> excellent backplate, there is now an empty slot (#4) hidden behind the blank
>>> part of the plate.
>>> Am I right in thinking that, to ensure JTAG continuity, I will have to
>>> install a DIN41612 plug with a loop from pins A27 to A29 in this slot?
>>> 
>>> I'd like to use the Janus card I have as an external sound card in slot 6
>>> with Excalibur in slot 5.
>>> 
>>> Supplementary question: Is there any way of generating a test two-tone
>>> signal in PowerSDR?
>>> 
>>> Cheers & 73
>>> 
>>> Chris
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>> 
> 
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