SDRTrunk tuner question

[dave3825]

I am monitoring an 800 MHz P25 system that spans 2.4375 MHz, so I am using an airspy mini at 6mhz with 10 max channels set. That system has airspy set as preferred tuner.

I have another system (700 MHz) P25 phase 2 that spans 3.85 MHz and I am trying to use 2 nooelec dongles for that system. RTL2832 / R820T is set as preferred tuner with 10 max channels.

What I see is after I start the airspy on the 800 MHz, It looks like the airspy just stays locked on the 800 MHz cc and one nooelec is doing the 800 MHz voice calls,. and the second nooelec is locked on the 700 mhz cc. Is there a way to have the airspy just do the 800 MHz system and or have the 2 nooelecs just do the 700 MHz?

 

[awasser1]

that should work.

alec
N1AJW

 

[lwvmobile]

What I see is after I start the airspy on the 800 MHz, It looks like the airspy just stays locked on the 800 MHz cc and one nooelec is doing the 800 MHz voice calls,. and the second nooelec is locked on the 700 mhz cc. Is there a way to have the airspy just do the 800 MHz system and or have the 2 nooelecs just do the 700 MHz?

Theoreticaly, that free nooelec dongle should tune to any available call channels on each as one comes up, but what you might could do is assign that second nooelec dongle to a dummy channel in the 700Mhz frequency in the vicinity of where you want it to tune. Assuming one nooelec can cover the control channel and part of the voice call area, the second one can cover the space adjacent to it to grab the rest if you assign it a quiet frequency to 'monitor' that's in the center of the gap you need to cover, then it should be able to grab any voice traffic. That way it won't try to handle calls from the 800Mhz system your listening to.

Maybe that could be a future feature, have a way to specify a pool of tuners to be used for each system, not sure if there is any other way to go about doing it right now though.

 

[dave3825]

what you might could do is assign that second nooelec dongle to a dummy channel in the 700Mhz frequency in the vicinity of where you want it to tune

I can try that but where exactly do I do that? Just create a dummy 700mhz channel in channels tab and set the nooelec as the preferred tuner?