Anyone know what this is? 465.2250Mhz

[citabria]

http://web.acma.gov.au/pls/radcom/assig ... ID=2223584

The license shows its owned by Railcorp, and the emission designator is 10K1 - which is used on P25 channels. I punched this into a scanner and i'm hearing encrypted digital garble.

Anyone know why railcorp has a digital repeater when they're quite big users of GRN?

[ivahri]

Citabria,

10k1 refers to the bandwidth, not the modulation type. In fact the emission designator suggests this is an analogue FM service, not P25. P25 does not have to be this bandwidth at all.

Mind you I know of another agency that has been running P25 with an analogue FM designator... which is a little naughty but then often techs move a little quicker than those doing the licencing paperwork.

Richard

[cartman]

Motorola's 800Mhz TETRA network also has the wrong emission designator listed throughout the affected sites Australia in the ACMA register. It was correct up to the point where they switched off the previous LTR network (16K ..... designator) and set up TETRA (25k ..... designator).

Grant

[citabria]

Hi Richard,

Spot on with the emission designators, Its quite strange, its seems that 10K1F3E is what ACMA database has for the majority of P25 that's out there.

I was (very badly) using 10K1 as an abbreviation for the full designator that seems to be applied to most P25 repeaters - like they say, the devil is in the details!

Cheers,
Matt

[ivahri]

Mind you I know a certain agency playing with circular polarisation that haven't changed their antenna details from vertical... just stirring as the naughty person is a mate of mine but he should slap himself on the wrist! I need to be careful because I'm certain I've forgotten to change something somewhere so we all hate doing the licencing paperwork, far more fun to be playing radio tech.

Cheers,


Richard

[cartman]

I checked with somebody who works in an area within rail that would be the most likely source of enc P25 and it definitely isn't them.
Covert Government group of unknown origin?
Having said that I am aware of their NAC via the PSR500 digital radio - only seen that NAC on this frequency
It will be interesting to see if that NAC reappears in due course on other frequencies


Grant

[cartman]

Figured out who it is (with some additional information from Matt)
However we are not liberty to discuss who the covert group is, given that the forum rules discourage such disclosures


Grant


The relevant section:
(Not to) Discussing illegal activites; including, but not limited to MDT decoding, "how-to" methods of decrypting encrypted frequencies, monitoring and discussing military and high-level law enforcement agency frequencies and monitoring mobile phones/cordless phones--also discussing frequencies you know you shouldn't listening to.

[citabria]

Thanks Grant, I'm glad I finally got an answer of sorts.

The forums rules are a little bit stricter than the Federal Radcomm act itself - but its not my forum so that's fine. Given the frequency is encrypted there's little point pursuing this anyway. I guess we can throw it in the same basket as the HF numbers stations - little more than an interesting curiosity.

Most of those rules are right, with the exception of one, but hey who cares anyway lol.

Cheers,
Matt

[durox]

don't suppose someone could satisfy my curiosity with a pm?

i'm also interested to know what this is.

cheers
durox

[Wonky]

don't suppose someone could satisfy my curiosity with a pm?

i'm also interested to know what this is.

cheers
durox

Ditto