Transmitter Rf Power - Tait TM8235 Service Manual

11.2

Transmitter RF Power

Introduction
Table 11.3 Voltages in millivolts corresponding to nominal forward and reverse powers
Frequency band
B1
H5
H7
TM8100/TM8200 Service Manual
© Tait Electronics Limited June 2006
If there is no fault with the power supplies, check the transmitter RF power
and correct any fault. The procedure is covered in the following eight tasks:
Task 4: check forward and reverse powers
Task 5: check RF output power
Task 6: power unchanged regardless of setting
Task 7: check for inhibiting of transmitter
Task 8: check temperature sensor
Task 9: power and current are skewed
Task 10: repair output matching circuitry
Task 11: power and current are low
The measurement points for diagnosing faults concerning the transmitter
RF power are summarized in
(checking the forward and reverse powers) is supplied in
Forward power (318 command)
2600 to 3400
3200 to 3900
3300 to 4000
Figure 11.5. Data required for the first task
Reverse power (319 command)
< 500
< 700
< 900
Transmitter Fault Finding (40W/50W)
Table 11.3.
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