Hi Jim,
Sorry to say, I don't have a good solution to suggest. Unless VAC can
be configured to handle four audio channels as a single 4-channel device
like the Delta44 sound card, I don't think it's going to work.
In principle MAP65 could be modified to allow opening a pait of
2-channel audio devices, which I think is what you are providing now
through VAC. However, in such a situation I see no way to ensure that
the sample times in the two channels are exactly the same. Any such
time offset would prevent MAP65 from operating correctly.
-- 73, Joe, K1JT
On 3/12/2015 4:41 PM, Jim Barr wrote:
> Good evening all
>
> I doubt if I will be of any use in the development but I have a very
> specific question that I felt was better asked here than on a more
> general forum.
>
> the question is wrt MAP65
>
> I am using a Angelia board from Anan as the back end for transverters
> and have 2 x G4DDK Anglian transverters fed from a single 116MHz source
> and all the radios locked to the same 10MHz source.
>
> I can now produce 2 x I&Q streams at 96000 via VAC from the two RX how
> can / do I feed this to MAP65, I can send either successfully and decode
> fine and I can TX from MAP65 fine but I cannot see how to have both RX
> Inputs, perhaps this is not at this stage possible without routing
> through Linrad or SDR-Radio but I thought it should be possible to feed
> the 2 streams direct to MAP65.
>
> I have been previously using a flex 1500 as the driver and feeding WSJT
> with a Funcube dongle feeding MAP65 as a spotting rx but now want to go
> full Dual polarity, and the Angelia with PowerSDRmRX PS works
> brilliantly and I hope to incorporate the "Pure Signal" pre-distortion
> scheme into the station after I get the rest sorted.
>
> Hoping some one can switch some light on for this dim bulb
>
>
> Jim, GI1CET
>
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