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Calibration tests
Tuneup
August 2004
© Tait Electronics Ltd
is greater than –70dBm approximately. The calibration test is run at
-68dBm, -60dBm and -50dBm for standard TM8000 radios, and -62dBm,
-54dBm and -44dBm for TM8000 trigger base radios.
Mute
The Mute test will calibrate the radio’s squelch (carrier) mute, at an RF
input level resulting in an audio measurement of 12 dB SINAD. The
calibration application will take an average of 35 noise measurements, to
determine accurate opening and points for Country, City, and Hard.
Note
Closing points are also calculated from this test.
Final Gate Bias and Tx Driver Bias Limit
The final transistor in the radio must be biased at a constant current. Each
transistor is different and so requires a different voltage to obtain the same
current.
The Final Gate Bias 1 test must be completed first before the Final Gate Bias
2 test.
Important
Jumping to a high DAC setting (the slider will change to
red) can cause overheating and component damage. You
can only force a slider into this danger zone with a deliber-
ate action. See Sliders for more information.
It should not be necessary to change these settings, unless there are specific
requirements.
Tx Power Control
Power control must be calibrated for high, mid and low and very low power
at five points across the radio’s frequency band to ensure a flat power output
across the operating band.
The Power Control test requires a total of 20 adjustments, four at each test
frequency.
