P25 Phase 2

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kd8eyf
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P25 Phase 2

Postby kd8eyf » Fri Aug 26, 2011 7:51 am

Is the standard finalized yet? If not is there a deadline?
2 timeslot TDMA / AMBE2 , sounds like trbo to me. Whats the difference?

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mr.syntrx
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Re: P25 Phase 2

Postby mr.syntrx » Fri Aug 26, 2011 8:55 am

For a portable radio, the main difference is $5000 :baby:
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Re: P25 Phase 2

Postby motorola_otaku » Fri Aug 26, 2011 12:00 pm

Right now the only Phase 2 solution on the table is Motorola's X2 TDMA system. It's essentially the same thing as Astro25 but with 2:1 TDMA capability. The control channel is Phase 1 and the vocoder is still IMBE. Talkgroups within the system can be programmed to use FDMA, or certain RIDs can be flagged as non-TDMA so when they affiliate with a particular talkgroup it will roll back from TDMA to FDMA. I don't know if it's compatible with SmartX, where you have an Astro25 system and an analog Smartzone system sharing the same zone controller with full talkgroup cross-system capability.
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kd8eyf
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Re: P25 Phase 2

Postby kd8eyf » Mon Feb 27, 2012 7:39 am

trying to wrap my head around the differences betweek phase 1/2
i started a spreadsheet
need help checking and finishing

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Re: P25 Phase 2

Postby motorola_otaku » Mon Feb 27, 2012 2:44 pm

Just to make things even more interesting, there's now "compliant" Phase II and X2 TDMA. Both use a normal FDMA Phase 1 control channel and can support mixed FDMA/TDMA voice, but the TDMA protocol is handled completely differently between the two. Current APX radios support both, but Harris and other manufacturers' radios will only support compliant Phase II. On the :wacker: end the PSR800 is the only scanner that will decode X2, and nothing out currently will decode compliant Phase II.
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Re: P25 Phase 2

Postby Wowbagger » Mon Feb 27, 2012 3:49 pm

These opinions are mine, not Aeroflex's - if you want service info, manual, or other official support please contact Aeroflex directly.

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Re: P25 Phase 2

Postby ka8ypy » Mon Feb 27, 2012 4:01 pm

I will always place the mission first.
I will never accept defeat.
I will never quit.
I will never leave a fallen commrade

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Re: P25 Phase 2

Postby motorola_otaku » Tue Feb 28, 2012 12:10 am

And the sign says you got to have a membership card to get inside.

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Re: P25 Phase 2

Postby Wowbagger » Tue Feb 28, 2012 10:49 am

These opinions are mine, not Aeroflex's - if you want service info, manual, or other official support please contact Aeroflex directly.

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Re: P25 Phase 2

Postby ka8ypy » Tue Feb 28, 2012 5:57 pm

I will always place the mission first.

I will never accept defeat.

I will never quit.

I will never leave a fallen commrade


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