SDRTrunk Adding A Tuner for Split Range

[DeaconHarry16]

Using SDRTrunk to monitor a local P25 Phase 1 system, RTL-SDR Dongle.
System site frequencies are split between 453 and 460 Mhz frequencies.
Works great for either "frequency band" but miss calls when traffic is on other band out of reach of the tuner.
If I add a tuner can SDRTrunk handle this "split band" trunking?
Thanks

 

[GTR8000]

Yes, that is one of the main benefits of SDRTrunk, you can add as many tuners as your system can handle.

Just note that there is currently no official way to "lock" a dongle to a particular slice of spectrum, so you may experience times when both dongles want to decode either 453 or 460, and the second dongle won't tune to the other range because of that. There is a workaround for that, which is to create a few "dummy" channels that effectively keep each dongle tuned within each range. This really only works if all 453 and all 460 channels fall within the 2.4 MHz of spectrum each dongle can cover. If you have a wider range to cover, such as 460-464, then you'll have some issues.

Link to the site you're decoding and you'll get a more specific answer based on the actual frequencies in use.

 

[DeaconHarry16]

So if i only play the control channels it should find the active voice channels in either band?
Currently i get control channel events that say "tuner unavailable" for "opposite band"
The event does display the unavailable frequency in the other "band"
Hmmm might need a little guidence on setting up "dummy channels" for this.
Thanks

 

[GTR8000]

It's actually the same band, just somewhat different ranges within UHF. But yes, if you have two dongles and if either range of frequencies is within 2.4 MHz of bandwidth each dongle can cover, it should work fine. As I said in my last reply, post a link to the specific site you're monitoring and we'll see if the frequencies all fall within two 2.4 MHz ranges.

 

[DeaconHarry16]

West Virginia SIRN
Heres a couple in my area

2 (2)	029 (1D)	Kopperston	Wyoming	453.1875a	453.5125c	460.025	460.0875	460.425
2 (2)	030 (1E)	Pax	Fayette	453.2625c	453.4875a	453.625	460.1125	460.2125	460.3875
2 (2)	031 (1F)	Beckley	Raleigh	452.100	453.525	453.5625	460.6375	460.6875c	461.6375	462.1125a

 

[GTR8000]

Okay you're in good shape, all of the frequencies in each range fall within a 2.4 MHz window. Two dongles will suffice.

 

[DeaconHarry16]

Thanks...i'll let you know how it turns out

 

[DeaconHarry16]

Added second tuner...works slick. Decodes all channels in split range. Not sure how it works but it does!
0.5.0 Alpha 6
Thanks