[TrunkCom] Connect Tone?

Sat, 19 Jan 2002 12:33:28 -0500

Motorola uses

0-105.88
1- 76.60
2- 83.72
3- 90.00
4- 97.30
5-116.13
6-128.57
7-138.46


----- Original Message -----
From: "Jerry Kacprzycki" <[email protected]>
To: <[email protected]>
Sent: Thursday, January 17, 2002 08:18
Subject: Re: [TrunkCom] Connect Tone?


> Does anybody know the frequencies of all the connect tones for Motorola,
EDACS and LTR?
>
> >>> "Rich Carlson, N9JIG" <[email protected]> 01/16/02 07:00PM >>>
> At 1:42 PM -0500 1/16/02, Jerry Kacprzycki wrote:
> >In reference to 800 MHz, what is a Connect Tone?
> >
>
> Connect tones are somewhat similar to PL tones in form and function.
> They are subaudible tones of around 100 Hz. (There are 8 different
> tones above and below 100 Hz.) that are part of the requirements for
> access to a Motorola trunked system. When programming a mobile or
> portable subscriber unit for a system you need to have the correct
> connect tone as well as several other items.
>
> Other than that there is little need for the connect tone information
> as relating to monitoring a system unless you are using Motorola
> radios to do so. Trunktrackers (BC780 etc.) do not need the Connect
> Tone, and in fact have no way of utilizing it.
>
> Several software packages, like Trunker and Treport, will report the
> decoded connect tone. It is one more item that can be used to verify
> the control data belongs to a specific system, just like a PL tone
> can be used to verify the user on a conventional channel.
>
> I have noticed that a couple of EDACS systems around me will display
> a PL of 74.4 Hz when monitoring the input frequencies of a system.
> Someone told me that they use 74.0 Hz. in a similar fashion as
> Motorola's Connect tone. Since this is within the tolerance of my
> inexpensive PL decoder it will display often. Whether it is required
> for access on an EDACS system I wouldn't know since I have no radios
> (or need for one) that will transmit on an EDACS system.
>
>
> --
>
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