Hi all,
I've found some frequencies that I believe are a trunk at the airport, but I'm unable to work out how to access them.
The existing analogue trunk is .4875mhz so I've deleted those.. but the rest I'm unsure how to work out which are linked.
My scanner is a Uniden UBCT396TX.
http://web.acma.gov.au/pls/radcom/site_ ... ID=9000011
Frequency
456.40000
456.90000
466.40000
466.90000
820.46250
820.48750
821.46250
821.48750
822.46250
822.48750
823.46250
823.48750
824.46250
824.48750
865.46250
866.46250
867.46250
868.46250
869.46250
Perth Airport Digital Trunk
Moderators: Infernal, Nafenn, numloxx
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Re: Perth Airport Digital Trunk
I can't seem to pick up any control channels on any of those frequencies?!?! Maybe someone who lives close to the airport could shed some light. I'm pretty sure the 400MHz frequencies wouldn't be trunked
Re: Perth Airport Digital Trunk
Have a look here: http://spench.net/rf/ Around the airport area, things like ground ops freqs and so on. Be warned though - Ground ops freqs for airlines tend to use callsigns and codewords (for obvious reasons), so don't expect to be able to tune in and know exactly what's going on.
Nathan Fenn
WARSUG Aviation Band & Reviews Moderator
Anything I say is my opinion, and has nothing to do with/does not reflect the views of anyone I was/am/will be involved with/employed by/volunteer for/associated with. There, I think that should cover it!
WARSUG Aviation Band & Reviews Moderator
Anything I say is my opinion, and has nothing to do with/does not reflect the views of anyone I was/am/will be involved with/employed by/volunteer for/associated with. There, I think that should cover it!
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Re: Perth Airport Digital Trunk
The link doesn't seem to work for meNafenn wrote:Have a look here: http://spench.net/rf/ Around the airport area, things like ground ops freqs and so on. Be warned though - Ground ops freqs for airlines tend to use callsigns and codewords (for obvious reasons), so don't expect to be able to tune in and know exactly what's going on.
![d'oh! #-o](./images/smilies/eusa_doh.gif)
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- Amateur callsign: VK6PCB
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Re: Perth Airport Digital Trunk
Link is working for me, however the RFMap is down.
Re: Perth Airport Digital Trunk
Well, you can ignore all the 82x.xxxxx frequencies, as they are Repeater Rx frequencies, with the Repeater Tx frequencies 45 MHz above.numloxx wrote: 456.40000
456.90000
466.40000
466.90000
820.46250
820.48750
821.46250
821.48750
822.46250
822.48750
823.46250
823.48750
824.46250
824.48750
865.46250
866.46250
867.46250
868.46250
869.46250
Likewise, the 456.xxxxx frequencies are the Repeater input frequencies, and so are of little use to scanner users.
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Comint
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Re: Perth Airport Digital Trunk
Thanks Comint.
Re: Perth Airport Digital Trunk
There have been some posts on these Forums about TETRA in use at the Airport, and as these frequencies are licensed to Comsource International Pty Ltd, a major supplier of TETRA systems in Western Australia, they are probably now been used for TETRA.numloxx wrote: 865.46250
866.46250
867.46250
868.46250
869.46250
Unfortunately, the Squelch circuit of most scanners does not respond to TETRA signals, so you would have to check each frequency with 'open squelch', to determine if the signal can be 'heard' at your location.
There is currently no scanner available that will decode TETRA signals.
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Comint
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Re: Perth Airport Digital Trunk
AFAIK encryption is routinely used on TETRA networks, anyway.Comint wrote: There is currently no scanner available that will decode TETRA signals.
Gavin Rogers; VK6HGR
http://vk6hgr.ampr.org/
WARSUG forum administrator
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http://vk6hgr.ampr.org/
WARSUG forum administrator
Site and stream donations: https://www.paypal.me/vk6hgr
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Re: Perth Airport Digital Trunk
Will there ever be a TETRA compatible scanner?? I know for a fact that TETRA is encrypted by default and it is illegal to intercept encrypted transmissions.
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Re: Perth Airport Digital Trunk
First up it is not illegal to monitor encrypted transmissions in Australia, the USA yes, but here no.Fitzyyy wrote:Will there ever be a TETRA compatible scanner?? I know for a fact that TETRA is encrypted by default and it is illegal to intercept encrypted transmissions.
And no there will not be a TETRA scanner in the forseeable future, TETRA uses end to end encryption and in this country, two levels of authentication. That alone makes the chances slim, and while TETRA is an open protocol, it is highly unlikely that a licence would be granted to a scanner manufacturer to build a scanner that could beat what is a major selling point of the system, transmission security.
R
Last edited by rustynswrail on Wed Jan 25, 2012 5:09 am, edited 1 time in total.
Re: Perth Airport Digital Trunk
Sorry about that! I've been upgrading various machines on the network, so there have been a couple of short outages.numloxx wrote:Link is working for me, however the RFMap is down.
If you wish to learn a little more about the technical details behind TETRA, have a look at: http://wiki.spench.net/wiki/TETRA
Let me know if there's someting else I should add there!