Tuneup Calibration basics 18
August 2004 © Tait Electronics Ltd
2 Calibration basics
Tait TM9000 radios are designed to be totally electronically tuned. No
physical tuning is required, as all tuning is done by electronic trimming
usually in the form of a digital-to-analog converter (DAC). The calibration
process uses a PC running the calibration software, which is connected to a
radio via an RS232 programming cable. RF in/out and audio in/out from
the radio are also provided for connection to test equipment.
2.1 Calibrating the radio
To calibrate the radio
1. Connect a radio to your PC and test equipment. For more
information, refer to the section on calibration equipment setup in
the TM9100 Service Manual.
2. Read the radio.
3. Select the File > Save menu command to save the radio’s current
calibration database to disk. This will enable you to view data (see
“Viewing calibration files” on page 21) and re-program with a
previous calibration database if necessary.
4. Either:
■ Change deviation or squelch settings (see “Deviation and squelch
thresholds” on page 27), or
■ Complete some calibration tests (see “Calibration tests” on page
22).
5. View and check the calibration data calculated (optional - see
“Viewing calibration test results” on page 21).
6. Program the radio.
Note Before performing some tests, the radio must contain at least
approximate receiver calibration settings. If the radio being
calibrated has had settings deleted or default data programmed,
then program another radio’s calibration database into the radio
before starting the tests.
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