Telemetry for Quantar Radios

Voice Alarm Module for Motorola Quantar Radio
DTMF Alarm Module for Motorola Quantar Radio

In our conversion from Analog to Digital P25 at Texas DPS, we lost some telemetry ability. The basic thing we used the telemetry for was simple alarms, such as Generator On/Generator Off, Tower lights On/Tower lights Off and so on. The decision was made to use a  Zetron device to give us voice alarms. The message when the alarm was triggered was repeated several times and it was up to the dispatch operators to make note of and log the alarms.

After looking at the device and what it did, I took it upon myself to do this simple function in a PIC based device. For about $50.00 I was doing what the Zetron was doing for $1100. We were not using all of the Zetrons capability but a very small part of it.

It was later asked if I could do the same thing but generate DTMF tones per alarm. The idea was we would add a DTMF decoder to the dispatch console electronics and for a tone sequence in, it would generate an alarm on the console screen.

I did this as well but it was never implemented because the decoder modules for the Motorola Console Electronics Bank (CEB) could not be found.

The application here is very narrow but I decided to post these on my website as food for thought. Because I did this as a project that I was sure would be manafactured, the drawings I made were very through. I am adding the drawing package as a PDF file and not including the software as I do have working prototypes in the field.

Write me if intrested in these devices.

Voice Alarm Module

DTMF Alarm Module

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