Updated Digital Listing

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cartman
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Updated Digital Listing

Post by cartman » Sun May 02, 2010 2:17 am

Digital listing under construction
Last edited by cartman on Fri Sep 09, 2016 4:35 am, edited 411 times in total.
Professional Scanner nut. Ibis bin chicken of radio scraps
Scanners:
Uniden 325P2, Whistler TRX-1, GRE PSR800 x 2, Uniden 780 x 3, Uniden 796, Uniden 396 x 2, Uniden 246,
Software:
DSD v2.368, Unitrunker, Trunkview

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cartman
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Location: Liverpool, NSW, Australia

Re: Updated Digital PMR Listing

Post by cartman » Sat Aug 07, 2010 12:05 pm

Scanned the 480-490Mhz airwaves yesterday and have now added Blaxland to the Vertel's "Teamtalk" NXDN Sydney Metro network
There are linked sites at Sydney Tower, Bondi Junction, Hurstville, Parramatta, Horsley Park, Kurrajong Heights and Blaxland


Grant
Professional Scanner nut. Ibis bin chicken of radio scraps
Scanners:
Uniden 325P2, Whistler TRX-1, GRE PSR800 x 2, Uniden 780 x 3, Uniden 796, Uniden 396 x 2, Uniden 246,
Software:
DSD v2.368, Unitrunker, Trunkview

CodeOne
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Joined: Tue Mar 09, 2010 7:30 pm

Re: Updated Digital PMR Listing

Post by CodeOne » Sat Aug 07, 2010 1:06 pm

Excuse my ignorance in regards to these systems. I am in Victoria but do visit Sydney every year in January. Are these frequencies able to be monitored with a Uniden 996 or Pro96?

If so I will load them up in a bank for next year.

Thanks for your hard work.

C1

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cartman
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Re: Updated Digital PMR Listing

Post by cartman » Sat Aug 07, 2010 5:17 pm

Nobody as far as I am aware can monitor these systems (yet)
NXDN uses a voice decoder called AMBE as part of their radio architecture which is not covered by digital scanners (which can only decode IMBE)
Nevertheless that doesn't stop one from getting familar with the "digital signature" each type of system makes
These NXDN signals have become apparent (along with a few Motorola Trbo or turbo sites) in the Sydney metro area over the last 6-9 mths
I have tried to do my best to log them by identifying the sites (hint: listen to the samples of each digital system that have posted on the internet, mainly amateur sites), the likely frequency combinations based on the ACMA entry and the old method of setting aside a bank or two in one of my Uniden 780 scanners and hitting the scan button, noting what frequencies are active with the NXDN or TRBO sound

Grant
Professional Scanner nut. Ibis bin chicken of radio scraps
Scanners:
Uniden 325P2, Whistler TRX-1, GRE PSR800 x 2, Uniden 780 x 3, Uniden 796, Uniden 396 x 2, Uniden 246,
Software:
DSD v2.368, Unitrunker, Trunkview

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cartman
Posts: 2179
Joined: Wed Aug 13, 2008 12:54 pm
Location: Liverpool, NSW, Australia

Re: Updated Digital PMR Listing

Post by cartman » Sun Aug 08, 2010 10:41 am

While looking for some City to Surf action this morning , I have come across a Motorola TRBO system on 492.925Mhz booming into Blacktown with a regular 60 sec pulse.
ACMA listing showed no-one fits the bill
I thought it might be a australia-wide or nsw-wide rental frequency but still no cigar

Grant

PS My old records showed this frequency as an active LTR frequency until 2007. Possibly Vertel
Professional Scanner nut. Ibis bin chicken of radio scraps
Scanners:
Uniden 325P2, Whistler TRX-1, GRE PSR800 x 2, Uniden 780 x 3, Uniden 796, Uniden 396 x 2, Uniden 246,
Software:
DSD v2.368, Unitrunker, Trunkview

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cartman
Posts: 2179
Joined: Wed Aug 13, 2008 12:54 pm
Location: Liverpool, NSW, Australia

Re: Updated Digital PMR Listing

Post by cartman » Sun Aug 08, 2010 11:40 am

Only some TV coverage loggings

485.975 103.5 OB TV director
486.075 110.9 carrier
487.9250 no ctss Ch 9 OB audio


Grant
Professional Scanner nut. Ibis bin chicken of radio scraps
Scanners:
Uniden 325P2, Whistler TRX-1, GRE PSR800 x 2, Uniden 780 x 3, Uniden 796, Uniden 396 x 2, Uniden 246,
Software:
DSD v2.368, Unitrunker, Trunkview

CodeOne
Posts: 18
Joined: Tue Mar 09, 2010 7:30 pm

Re: Updated Digital PMR Listing

Post by CodeOne » Sun Aug 08, 2010 1:11 pm

Thanks for the info Grant. I understand what you are logging now.

Cheers, C1
(Greg)

Mike Alpha
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Re: Updated Digital PMR Listing

Post by Mike Alpha » Sun Aug 08, 2010 1:32 pm

cartman wrote:Nobody as far as I am aware can monitor these systems (yet)
NXDN uses a voice decoder called AMBE as part of their radio architecture which is not covered by digital scanners (which can only decode IMBE)Grant
And don't forget the main benefit of both NXDN and MOTOTRBO is that they use FDMA and TDMA digital transmissions to "technically" allow two users on the same frequency.

Mike

centralcoastscanman
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Re: Updated Digital PMR Listing

Post by centralcoastscanman » Sun Aug 08, 2010 7:18 pm

so basically mike its the same theory but on steroids as a pmr channel that has two different ctcss tones....

citabria
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Re: Updated Digital PMR Listing

Post by citabria » Sun Aug 08, 2010 7:33 pm

NXDN and TRBO can do two users at the same time.

I suspect that TRBO with Enhanced privacy can't do it as there needs to be somewhere for the encryption sync info to go in between- at a guess they're using the spare slots for the enc sync.

Someone please correct me if thats wrong.

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