AOR AR-DV1

[JASII]

Can the AOR AR-DV1 properly decode P25 CQPSK Linear Simulcast Modulation signals?

 

[MStep]

Can the AOR AR-DV1 properly decode P25 CQPSK Linear Simulcast Modulation signals?

I've watched your thread essentially wither here for the past week--- unless you've already gotten an answer somewhere else, it's probably time to call AOR in either Japan or the USA to get the definitive word.

 

[Vince64]

Hi,
except missunderstanding from my side, P25 SQPSK is also call P25 C4FM. this is APCO 25 phase1.
Phase 1 uses the IMBE voice codec.
DV1 can decode P25 Phase1.
In regards to P25 Phase2, it's use AMBE +2 which is not yet implemented into DV1.

 

[hamradionl]

Like my quest about dPMR AOR answered the question with: Supported vocoder is AMBE+2.

 

[rustynswrail]

The irony is that P25 P2, DMR and NXDN use the same AMBE+2 vocoder, just in different ways.

So the DV-1 could be made to acknowledge (as opposed receive/trunk) P25 Phase II, possibly. P25 Remember, Phase II is a trunking platform only. The control channel and non-trunking communications revert back to Phase I.

Also I dare say with a bit of heavy R&D, there is a remote and I underline remote chance it could receive (but not trunk) Phase II somewhat like it currently does DMR. I wouldn't like to put money on it however.

R

 

[Vince64]

The irony is that P25 P2, DMR and NXDN use the same AMBE+2 vocoder, just in different ways.
R

Can you give me some link which mention such info?
In my understanding, DMR and NXDN are not AMBE+2
Thanks

 

[rustynswrail]

This is from Wikipedia.

DMR, along with P25 phase II and NXDN are the main competitor technologies in achieving 6.25 kHz equivalent bandwidth using the proprietary AMBE+2 vocoder. DMR and P25 II both use two-slot TDMA in a 12.5 kHz channel, while NXDN uses discrete 6.25 kHz channels using frequency division.

The link is https://en.wikipedia.org/wiki/Digital_mobile_radio