Motorola IIi Hybrid Trunk decoding

GNU Radio
1

Has anyone written a motorola trunk decoder for gnuradio? I’d like to be
able to dump all active audio in a trunk to separate streams by
talkgroup. I’d love to know about any trunk decoders in general.

Thanks!

-Brett

2

Hello,

I considered doing a Motorola decoder, but no code yet. It uses a basic
3600 baud FSK modulation for the control channel data.

Here are some links.

General Trunked Radio System information.

General Trunked Radio Decoders.

Trunker (DOS) with source code link.

73 Eric
----- Start Original Message -----
Sent: Tue, 05 Apr 2011 13:54:47 -0500
From: “Brett L. Trotter” [email protected]
To: [email protected]
Subject: [Discuss-gnuradio] Motorola IIi Hybrid Trunk decoding

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----- End Original Message -----

3

On Tue, 2011-04-05 at 16:24 -0400, Eric C. wrote:

Hello,

I considered doing a Motorola decoder, but no code yet. It uses a basic 3600
baud FSK modulation for the control channel data.

I have a Smartnet II decoder on CGRAN, which will log the whole trunk to
disk by talkgroup:
https://www.cgran.org/wiki/Smartnet

It’s not exactly production-grade software, but it works.

I don’t know anything about IIi hybrid, but I suspect it is the same as
II on the downlink (ie not backhaul) side.

–n