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"SAFE" scanning of a Moto trunked system, revisited

This forum is dedicated to discussions pertaining specifically to the Motorola ASTRO line of radios (those that use VSELP/IMBE/AMBE), including using digital modulation, digital programming, FlashPort upgrades, etc. If you have general questions please use the General or Programming forums.

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Elroy Jetson
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"SAFE" scanning of a Moto trunked system, revisited

Postby Elroy Jetson » Sat May 02, 2009 11:39 am

I don't claim ownership of this one, but there is yet ANOTHER way to use a Motorola trunked portable
radio as a trunked scanner, SAFELY.

It's so simple, it's a wonder that we haven't used this method since the days of the STX.

Simply drop the TX deviation (including and especially the data deviation) to zero. No data passes,
the system only hears a dead carrier from your radio if it hears anything at all. Safe as can be.


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Re: "SAFE" scanning of a Moto trunked system, revisited

Postby escomm » Sat May 02, 2009 11:44 am

Other than unlicensed transmission on what are almost certainly public safety frequencies, you raise a good point

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Re: "SAFE" scanning of a Moto trunked system, revisited

Postby nmfire10 » Sat May 02, 2009 12:42 pm

You could drop the power down to nothing too. But in either case, you've rendered the radio useless as anything but a receiver. So you have a $1,000 scanner limited to one band and only a handful of talkgroups.
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Re: "SAFE" scanning of a Moto trunked system, revisited

Postby akardam » Sat May 02, 2009 1:24 pm

Guess you missed the bajillion other threads where this topic has been beat to death ad nauseum.

Let me be perfectly clear:

There is no legal ("safe") way to passively monitor a trunked radio system with a trunking tranceiver, whereby trunking parameters are programmed into the tranceiver, without permission and authorization from the system managers. Period.

Go buy a scanner.

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