There is still a lot of work to be done before this can be released, but I thought it would be good to show a video of some progress. In this video, there are 14 channels being monitored including 4 P25 P1 channels, 2 DMR control channels, 5 DMR traffic channels, and 3 NXDN traffic channels. I will be working on adding the ability to monitor FMNB channels and also the ability to scan P25 trunked systems along with the other modes simultaneously. It is taking longer than I expected to get this all working.
P25RX-II P25RX-II Multimode Scanning
- Thread starter btt
- Start date
Great job Todd,
Can't wait for the release
Can't wait for the release
- Joined
- Nov 16, 2004
- Messages
- 2,049
This looks excellent, thank you for continuously making your products better!
dispatchgeek
Control channel goes "brrrrr"
You’ll have to get in line behind my requests for Opensky, Aegis Provoice, GE MARC, LTR Passport and Tetra! 🤣 /sarcasm
I plan on adding the same features to the P25RX once I'm done changing the P25RX-II code.
FreqNout
Member
dispatchgeek
Control channel goes "brrrrr"
I’ll throw my hat in as well. My county would be a good test bed for mixed mode scanning of P25 trunked/NBFM. (I posted this too soon. I can do that for the P25RX. Don’t have an RX-II.)
MStep
Member
NBFM is something that I think has been discussed before, and it would certainly make this unit closer to a "one-size-fits-all" unit for mobile installations.
Incidentally, for those considering either the P25RX or the P25RX-II, what then would be the primary differences between both models?
The P25RX-II has an external IF filter with 90+ dB stop band. The P25RX-II is currently available because I was able to purchase an inventory of parts before they became unavailable. Those are the two big differences. Another internal detail is that the P25RX has an ASIC that performs A/D conversion, analog filtering, decimation, digital filtering. The samples are then transferred via a slow serial interface for further filtering / demod / decode. With the P25RX-II, the ASIC provides an analog IF signal that is externally filtered and fed to A/D converters on the MCU. The A/D converters on the MCU have over-sampling in hw (12-bit conversion, 14-effective) and provide sample buffers with DMR transfers (very fast). Because of the DMA, the P25RX-II is able to perform more work on the samples in software.
That's awesome, can't wait to give it a try. Any idea when you will put out a beta?
Hopefully not too much longer. It isn't usable right now because there is no way to edit the channel configurations. currently, all the channel config records are hard-coded for testing.
ScannerDude244
Member
Nice will it be able to do mix mode?
Yes... the video shows it scanning/decoding 150 MHz analog FM, 460 MHz NXDN, and 850 MHz P25 at the same time.
MStep
Member
A lot of well-deserved excitement on making a great product even better !!!
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