Nooelec and op25

[Watton925]

I have op25 running fine on rpi4 with rtl-sdr v3 but when I switch it to my nesdr smart I get nothing and I have blacklisted the drivers they recommend. Same nooelec dongle works fine on windows computer. Any help??

 

[AB5ID]

I had a lot of trouble with my connector seating correctly. It works better on a usb extension cable. Have you tried to see if it will run with GQRX?

 

[boatbod]

Check the 'dmesg' command to see if the device is having issues. I've experienced USB connector failure with some of mine, even when using extension cables.

 

[a417]

lsusb -v

 

[wgbecks]

Try to avoid USB extension cables. Most of them are junk from the word go.

 

[Watton925]

Well I can see from the plot that I’m getting good signal but op25 seems not to see it could it be some thing in my command line I use to run it ?

 

[a417]

Try to avoid USB extension cables. Most of them are junk from the word go.

especially the unpowered simple extension cables, the active cables have given me more success.

 

[a417]

...what's your command line?

 

[Watton925]

./rx.py --args 'rtl' -N 'LNA:36' -S 960000 -f 453.4750e6 -l 'http:0.0.0:8080' -o 25000 -q -2 -O hw:0 -x4 -T trunk.tsv -V -2 -U 2> stderr.2 This works fine with rtl-sdr v3

 

[a417]

./rx.py --args 'rtl' -N 'LNA:36' -S 960000 -f 453.4750e6 -l 'http:0.0.0:8080' -o 25000 -q -2 -O hw:0 -x4 -T trunk.tsv -V -2 -U 2> stderr.2 This works fine with rtl-sdr v3

are you intentionally applying a -2 offset to this new dongle as well?

remove "-q -2"

 

[boatbod]

Please post a screenshot of the mixer, datascope and constellation plots along with any relevant messaging in the stderr.2 logfile.

 

[Watton925]

the -q -2 was the issue thank you

 

[a417]

 

[maus92]

especially the unpowered simple extension cables, the active cables have given me more success.

I must have purchased good ones - I use 10' unpowered USB 3.0 extensions and Nooelec SDRs with no problems. The Nooelecs are 0.5ppm error, so they need little correction; mine don't use any. My RTL-SDR v3 are ~1.0ppm.

 

[a417]

I must have purchased good ones - I use 10' unpowered USB 3.0 extensions and Nooelec SDRs with no problems. The Nooelecs are 0.5ppm error, so they need little correction; mine don't use any. My RTL-SDR v3 are ~1.0ppm.

I have one good 10' extension as well, the problematic ones are the little cheapo 1 to 3' disposable ones. For distance runs of 10' or more, I was referring to the powered USB repeater extensions that go out to 30' w/o an issue...

 

[Watton925]

My next issue is how to port the audio to Bluetooth or to my usb sound card correctly it works fine thru HDMI

 

[a417]

is this a headless install?

 

[Watton925]

No it is not headless I’m pretty sure it has to do with the HW value can not figure it out.

 

[a417]

What bluetooth stack are you using? Bluez w/ PulseAudio?

 

[Watton925]

Yes I would assume so