Spectrum analyser bias-t control not working

[ChrisHarrisParticipant]

I have RSP1a which I hope to place aboard a ship on Monday to assist the crew with locating a GPS interference issue.

All works well until I try to turn on the bias-t (required to power the GPS antenna) when nothing happens. I’ve checked with a multimeter. It works fine from the control in SDRUno.

Any ideas any anyone?

[Steve AndrewParticipant]

Hi Chris

I’m currently working on that problem now and the fix should be in the next release. Once that problem is sorted out then I can release the updated version. Bias-T does work with an RSPdx but of course that is not of much use to you in your present situation. The only thing I can suggest is to use an external Bias-T.

Best regards

Steve

[ChrisHarrisParticipant]

Hi Steve,

Thanks for the reply. Congratulations on a nice job with the software by the way! pity about the bias T control 😉

When do you think that you will release the fix?

I had thought about an external bias-T but would have to build one and can’t get small enough inductors locally, besides building for 1.5GHz is a bit hit and miss 🙂 I can see the signal in SDRUno so that’s OK but no real spectrum analysis tools there. Had a look for a company that could supply one overnight but have drawn a blank so far.

Thanks
Chris

[Steve AndrewParticipant]

Hi Chris

The Bias-T issue is the only outstanding problem now, so once that’s fixed the next release should be ready to go. I don’t want to put a time on it as the unexpected can always happen, but I would have thought sometime in the next 4-6 weeks. – Could be sooner, could be later.

All the best

Steve

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