OP25 Inovato Quadra running OP25

[ewh01]

FYI - I have Boatbod's OP25 running on a quadra. sounds great, maybe even better than on the RPi.

It was going to sleep, suspend, whatever it is, so I added the command to stay "awake", but that is not a Quadra issue. Let's see how it goes long term.

 

[DC31]

Likewise, I have SDR-Trunk running on a Quadra. It uses a lot of CPU and Memory but has been stable for the last day or so. Streaming the audio out to icecast using pulseaudio and darkice.

Inovato Home

Inovato Quadra: A Mini PC for school, home, hobby

inovato.com

 

[VexingRaven]

Any details on how many streams you're decoding at once or how much spectrum you're covering? I'd figure P25 following would be pretty tough on a cheap SBC like that, but quite promising that it works since that's probably a good way to get a cheap, low-power 24/7 scanner going.

 

[DC31]

I have kept it pretty limited to start. I am streaming 3-4 talkgroups, none of which are particularly busy. As far as spectrum width, you are going to need to help me with that. Where do I find that info in SDRTrunk?

 

[VexingRaven]

How many channels are in use at once and how wide is the bandwidth of your SDR (or which SDR do you have)? I'm even more curious now that I see you're using SDRTrunk, the prevailing wisdom in the SDRTtrunk community is that there's no way SDRTrunk will run on an SBC because it's too CPU-intensive, so hearing that you got that working is awesome. I'm a bit too attached to Trunking Recorder myself to go to Linux, though.

 

[DC31]

Here is a screen shot of the tuners section:

 

[boatbod]

Looks like the full RTL 2.4MHz sample rate from that screenshot.

 

[VexingRaven]

Cool, thanks for sharing!

 

[maus92]

The ppm adjustment / error is concerning.

 

[DC31]

The ppm adjustment / error is concerning.

It is an old, non-temperature compensated stick.

 

[boatbod]

It is an old, non-temperature compensated stick.

I had one of those a long time ago and it required a PPM correction somewhere around that magnitude too. Once it was warm it did just fine!