Re: Multipsk , SDR direct via soundc card , and a Flex


Dec 14, 2010

 


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#10107 Dec 14, 2010

I am trying to help a ham with a Flex 1500. He has his Flex 1500

working well with PowerSDR. VAC, and FLdigi. FLdigi only takes the

traditional 4 khz of audio signal. How can my friend KEEP his current

Flex 1500 and Power SDR settings and feed the I and Q in to Multipsk ?

I wondered if it would work if he simply activated the Direct SDR

Via Soundcard and chose VAC in the sound device )Input) settings

withing Multipsk, that did not work. In the device listing, Flex was

listed but choosing that did not appear to get a signal in to wither

Multipsk waterfall.



Andy K3UK



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#10110 Dec 14, 2010

Hello Andy,



PowerSDR does the same job as the SDR stuff in Multipsk. So how PowerSdR

takes the I/Q from Flex1500?

It might be the same way used by Multipsk that the one used by PowerSDR.



73

Patrick



-----Message d'origine-----

De.: multipsk@yahoogroups.com [mailto:multipsk@yahoogroups.com] De la part

de Andy obrien

Envoy..: mardi 14 d.cembre 2010 22:47

..: multipsk@yahoogroups.com

Objet.: [multipsk] Multipsk , SDR direct via soundc card , and a Flex ?



I am trying to help a ham with a Flex 1500. He has his Flex 1500

working well with PowerSDR. VAC, and FLdigi. FLdigi only takes the

traditional 4 khz of audio signal. How can my friend KEEP his current

Flex 1500 and Power SDR settings and feed the I and Q in to Multipsk ?

I wondered if it would work if he simply activated the Direct SDR

Via Soundcard and chose VAC in the sound device )Input) settings

withing Multipsk, that did not work. In the device listing, Flex was

listed but choosing that did not appear to get a signal in to wither

Multipsk waterfall.



Andy K3UK





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Yahoo! Groups Links



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#10111 Dec 14, 2010

He has his Flex 1500 getting audio to powersdr via VAC, I think..

On Tue, Dec 14, 2010 at 5:10 PM, Patrick Lindecker f6cte@...> wrote:

.Hello Andy,



PowerSDR does the same job as the SDR stuff in Multipsk. So how PowerSdR

takes the I/Q from Flex1500?

It might be the same way used by Multipsk that the one used by PowerSDR.



73

Patrick



-----Message d'origine-----

De.: multipsk@yahoogroups.com [mailto:multipsk@yahoogroups.com] De la part

de Andy obrien

Envoy..: mardi 14 d.cembre 2010 22:47

..: multipsk@yahoogroups.com

Objet.: [multipsk] Multipsk , SDR direct via soundc card , and a Flex ?





I am trying to help a ham with a Flex 1500. He has his Flex 1500

working well with PowerSDR. VAC, and FLdigi. FLdigi only takes the

traditional 4 khz of audio signal. How can my friend KEEP his current

Flex 1500 and Power SDR settings and feed the I and Q in to Multipsk ?

I wondered if it would work if he simply activated the Direct SDR

Via Soundcard and chose VAC in the sound device )Input) settings

withing Multipsk, that did not work. In the device listing, Flex was

listed but choosing that did not appear to get a signal in to wither

Multipsk waterfall.



Andy K3UK



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#10115 Dec 15, 2010

Hello Andy,  If Powersdr takes audio (I/Q) from a VAC, Multipsk must take audio (I/Q) from the same VAC.  73Patrick    De : multipsk@yahoogroups.com [mailto:multipsk@yahoogroups.com] De la part de Andy obrienEnvoy. : mardi 14 d.cembre 2010 23:15. : multipsk@yahoogroups.comCc : Ted LeonardObjet : Re: [multipsk] Multipsk , SDR direct via soundc card , and a Flex ?



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#10116 Dec 15, 2010

But when he chooses the same VAC in Multipsk, Multipsk says that it cannot launch because the device is in use by another application.

Andy

On Wed, Dec 15, 2010 at 2:29 PM, Patrick Lindecker f6cte@...> wrote:

.Hello Andy,.If Powersdr takes audio (I/Q) from a VAC, Multipsk must take audio (I/Q) from the same VAC..73Patrick

..De.: multipsk@yahoogroups.com [mailto:multipsk@yahoogroups.com] De la part de Andy obrien

Envoy..: mardi 14 d.cembre 2010 23:15..: multipsk@yahoogroups.comCc.: Ted LeonardObjet.: Re: [multipsk] Multipsk , SDR direct via soundc card , and a Flex ?



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#10119 Dec 15, 2010

Andy,  Multipsk uses Windows API. So somewhere this VAC must be used by another application. However, it can be more complex. Difficult to know…  73Patrick  De : multipsk@yahoogroups.com [mailto:multipsk@yahoogroups.com] De la part de Andy obrienEnvoy. : mercredi 15 d.cembre 2010 20:54. : multipsk@yahoogroups.comObjet : Re: [multipsk] Multipsk , SDR direct via soundc card , and a Flex ?



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#10123 Dec 16, 2010

Hi Andy in the SDR set up for VAC use MME and Microsoft Sound mapper for the input and output, for MultiPSK use default computer sound card for input and output, it should work. the com port will key it.  Jack N8ABY --- On Wed, 12/15/10, Patrick Lindecker f6cte@...> wrote:

From: Patrick Lindecker f6cte@...>Subject: RE: [multipsk] Multipsk , SDR direct via soundc card , and a Flex ?To: multipsk@yahoogroups.comDate: Wednesday, December 15, 2010, 3:56 PM

 Andy,



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#10132 Dec 17, 2010

I think from reading this thread, there is a lot of confusion.



The Flex radio, irrispective of what controls it, provides an I/Q audio

stream to the soundcard, that is used by PowerSDR "OR" MultiPsk (in I/Q

mode.)



FLDigi, taking audio from PowerSDR, is done in Mono, P'SDR does the I/Q

to audio conversion.



For M'PSK to do the I/Q decoding itself, it needs direct access to the

two I/Q streams, and of course if P'SDR is active, it can't do that.



Much as in the same way, you can't ordinarilay share a com port between

two programs, at the same time (at least, not without some extra

software/drivers to handle it.)



I don't use VAC, but if it can act as a stereo splitter (one I/Q feed

input, and two identical I/Q outputs) or you can pursuade your soundcard

drivers to do that (I somehow doubt it) then use one feed for P'SDR, and

the other for MuktiPSK. Then there is just the issue of who controls

what. PLUS! You must make sure that both programs are using the same

soundcard sample rate, or (a) there could be some mis-assingment of

frequencies on on app or the other, or (b) huge CPU loading due to one

app resampling the stream "on the fly".



If one or the other program "Needs" hardware or driver control of the

souncard, that still may not work, depending on how each program handles

that situation.



Note too, that after WinXP, MS changed the way Windows "does" sound, in

regards to the API call's and methods etc. There are many Ham soundcard

programs that if they run at all, will not be able to use any built in

soundcards, but external (USB) or other "virtual" (VAC) type things work

fine.



Or, you're limited to the 4kHz or so mono output from P'SDR to feed

M'PSK, just like any other radio.



Hope something here helps understand the problem, or if I've gone off in

the wrong direction, let me know.



Best Regards.



Dave G0WBX.






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