External sound-card for the FLEX-1500
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External sound-card for the FLEX-1500 Expand / Collapse
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Posted Wednesday, March 2, 2011 7:01 AM
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I´m playing with the though on using a better external soundcard (CODEC) fir t FLEX-1500.

Anyone having a schematics or similar where I can grab/put the I/Q-signals to my external soundcard ??

n.r Tilman SM0JZT

SM0JZT Tilman

Post #4002
Posted Wednesday, March 2, 2011 8:50 AM


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The only way to I/Q out of the FLEX-1500 (or any FlexRadio SDR) is to use VAC and enable the Direct I/Q option. With the new streaming USB driver, the FLEX-1500 no longer looks like an audio device.

Also, there are no schematics for the 1500 available at this time.


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Tim - W4TME
Post #4004
Posted Wednesday, March 2, 2011 9:07 AM
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Correct me if I´m wrong. Will interfacing trough a VAC into a alternative sound-card really fly and give me better performance ??

I guess a hardware intervention (need for schematics) is the option that I need to look out for to get the stuff done that I´m looking for.

/ Tilman

SM0JZT Tilman

Post #4005
Posted Wednesday, March 2, 2011 9:30 AM


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You are correct that the I/Q has been digitized at this point in the signal chain so using a sound card will not really buy you anything from a dynamic range standpoint.

You will have to hack into the board to do what you want to do and even then I do not know if it will work properly since the software is written for the existing codec.

Good luck in your experimentation.


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Tim - W4TME
Post #4007
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