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Hi all,

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I'm currently working on a pair of Motorola GM900 to replace the TX/RX in one of our UHF repeaters.

I could program them with a RIB on the right frequency and they both work, the repeater is working OK.

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Now I want to align them as precisely as possible with the "tuning procedure" as found in the service manual.

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Unfortunately, this procedure needs a GTF180 test box which I don't have.
Nowhere is the GTF180 described and where the different signals have to be fed into the radio.

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The transmit deviation balance says a 80 Hz and a 1000Hz is to be injected into the test box.

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Does someone know WHERE these signals are to be fed or has a GTF180 diagram and manual ?

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Thanks for any help,
73 Patrick