AOR AR-DV1

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JASII

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

MStep

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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

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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.
 

rustynswrail

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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
 

rustynswrail

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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
 
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