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RSPduo Bias-T
Posted: Sun Jun 17, 2018 2:45 pm
by safuser
I have an RSPduo and am trying to drive a lna4all at the antenna with the built in Bias-t. I am not getting any voltage out of the RSPduo on Tuner 2 port when I have Bist-t selected in SDRuno so I am unable to drive the lna4all? Please advise?
Re: RSPduo Bias-T
Posted: Sun Jun 17, 2018 4:46 pm
by g1hbe
It's worth checking to see if the voltage is appearing at the tuner 1 port instead. The rsp2 suffered from swapped-over ports a few months ago and it caused great confusion!
Re: RSPduo Bias-T
Posted: Mon Jun 18, 2018 1:49 am
by Mike2459
- LNA4ALL.JPG (45.51 KiB) Viewed 14059 times
The RSPDuo's Bias-T outputs 5 volts@100ma. Some versions of the LNA4All have their own on board 5 volt regulator and require a 6 to 9 volt Bias-T supply. Another version can operate with a 3.3-5V Bias-T according to the LNA4all website.
http://lna4all.blogspot.com/. Was a spec sheet included with it?
Re: RSPduo Bias-T
Posted: Mon Jun 18, 2018 2:29 am
by Mike2459
Sorry I think I misunderstood your question in the preceding reply.
Re: RSPduo Bias-T
Posted: Mon Jun 18, 2018 5:32 am
by sdrplay
Please confirm what the configuration is in SDRuno when you are seeing no voltage. If it's when the tuner 2 is the slave, then that's an issue we are looking into. Please try other configurations such as tuner 2 in single tuner mode and making tuner 2 the master in master/slave mode.
If you are able to confirm which of these modes you are having a problem with in a ticket (
https://www.sdrplay.com/support) we'll be able to confirm that it is a software issue or not.
Best regards,
SDRplay Support