[hpsdr] JTAG continuity

[roland etienne]

Hi Pete,

The continuity of the Jtag chain is only useful when if you want to load the
code in the various cards in-situ, without having to manipulate the boards.
So, only when there is an update of the code.

In normal use, there is no need for this continuity, and you can have empty
slots between the boards.

I don't know what use of Janus Chris is thinking...

73, Roland f8chk



-----Message d'origine-----
De : n3evl [mailto:n3evl at townisp.com] 
Envoyé : vendredi 20 novembre 2009 23:55
À : roland etienne
Cc : 'Chris Smith'; 'HPSDR list'
Objet : Re: [hpsdr] JTAG continuity

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
> G4NUX 
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