Transmitter Rf Power - Tait TM8100 mobiles Service Manual

12.2

Transmitter RF Power

Introduction
Table 12.3 Voltages in millivolts corresponding to nominal forward and reverse powers
Frequency band
A4
B1
C0
D1
H5
H6
350 Transmitter Fault Finding (25W)
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) are supplied in
Forward power (318 command)
2700 to 3900
1100 to 2000
1100 to 2000
1600 to 2500
2500 to 3500
2800 to 3900
Figure 12.5. Data required for the first task
Reverse power (319 command)
<700
<500
<500
<700
<1000
<1000
TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
Table 12.3.