And so it starts...

Re: And so it starts...

Postby ivahri » Wed Feb 29, 2012 3:35 pm

Andrew,

FDMA & TDMA each has their strengths & weaknesses. FDMA will never be "last years model", it comes down to what the customer needs. TDMA comes with a whole new set of challenges- and costs- and I can't see why a relatively low population state like SA would need Phase 2. It isn't something ACMA would be pushing, and unless the agencies are pushing it I can't see why they would leap straight to Phase 2. I know NSW is looking at Phase 2 for Sydney and retaining Phase 1 elsewhere. That is because of NSW Police needing the spectrum/network capacity in Sydney, but in more rural areas the pressures don't exist.

Richard
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Re: And so it starts...

Postby Scotty » Wed Feb 29, 2012 3:41 pm

Where does this leave current trunk scanners? I don't believe any Uniden scanners are compatible, and likewise with most other manufacturers. Any chance it would be as simple as a firmware upgrade in later models, or is the hardware simply not compatible?
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Re: And so it starts...

Postby matthewn1983 » Wed Feb 29, 2012 7:43 pm

No scanner at the moment as far as i've read, i think the manufacturers are waiting for it to be rolled out, theres not too many sites that are using it, according to the RR state threads anyway.
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Re: And so it starts...

Postby Longreach » Wed Feb 29, 2012 7:50 pm

I read a while back the PSR800 was capable of doing TDMA (Phase 2)

thread here

http://forums.radioreference.com/gre-sc ... ma-no.html

cheers
Matt
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Re: And so it starts...

Postby citabria » Wed Feb 29, 2012 8:01 pm

The irony of Phase 2 is that when its operating in TDMA mode, its using TDMA time slots, but the underlying modulation is FDMA.

So you got two slots in time, and each time slot is a conventional FDMA frame :)

:geek:
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Re: And so it starts...

Postby cartman » Fri May 25, 2012 2:03 am

Anybody seen these transcripts from October 2011 re P25 Phase II?
Stumbled on them as usual while looking for something else


Grant

http://www.p25phase2.com/p25-phase-2-roundtable-themes
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