Using DAX IQ for satellite telemetry query

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  • Updated 4 months ago
I want to be able to use DAX IQ to record telemetry from various satellites. and the save the data to a .wav file.
My question is where is the data being saved, or else how do I save the downloaded data?

Advice please.
Ross
ZL1WN
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Ross Biggar

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Posted 4 months ago

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Lee - N2LEE

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Ross, I think its only saved in memory of the Flex. To record it and use it or review it you would have to use one of the telemetry programs or something and audio recording software such as Audacity.
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Ross Biggar

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Thanks Lee,  recording into Audacity worked perfectly.
Next I want to be able to output the file to a modem program which is running in the radio, what flexsetting should I use to get the output from Audacity .

Regards
Ross
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Lee - N2LEE

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Thats great news. In order to play the audio out of Audacity into the flex or you would select the dropdown box to the right of the speaker icon and use DAX Audio TX. That will send the audio to flex transmitter.

Is this what you are trying to accomplish ?

Lee
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Paul

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Hi Ross, you could feed the DAX IQ stream into Simon Brown's excellent 'SDR Console' software. This has an IQ record facility and you can save the file to whatever location you choose. There is also an integrated satellite tracker which might be useful to you. If I remember correctly, at start-up, you select 'Softrock' as the radio type in order for the software to interface with the IQ stream.

I have used this in a different (non satellite) application for a long time and it's robust & reliable.

Hope this helps. 73, Paul
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Mike Hoing

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Use a third party program to record and select the appropriate Dax channel as the sound input


That will allow you to save it where ever you want and replay or send


NN9DD
(Edited)
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Dudley - WA5QPZ, Elmer

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You can also record up to 192Khz with PowerSDR , running in Demo mode , DAXIQ as the audio input .
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Lee - N2LEE

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Dudley does PowerSDR run on the Flex Signature Series ?
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Paul

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Hi Lee, it sounds like Dudley is making the same suggestion as I did earlier in this thread, except I proposed using Simon Brown's SDR Console. The end result is the same.

Neither PSDR or SDRC are interfacing with the rig in the "normal" way. The only connection between the two would be the DAX IQ stream, patched either in windows or a virtual audio cable. As such, there will be no rig control from the software nor any other of the usual interactions.

You will however be able to view & record approximately +/- 85 kHz of spectrum/ waterfall, centred on any slice selected in SSDR. It actually won't be a full 192kHz because the DAX IQ stream is filtered steeply by design so the output rolls off quickly at the extremes of the waterfall.

If you need extra interaction between the radio and SDRC or PSDR you could try using SSDR CAT and OmniRig to marry the two together. I have done this using SDRC, it works well, giving point/click tuning etc. I have not tried it with PSDR but I imagine it might work too.

Hope this helps.
(Edited)