Transmitter Rf Power - Tait TM8100 mobiles Service Manual

11.2

Transmitter RF Power

Introduction
Table 11.3 Voltages in millivolts corresponding to nominal forward and reverse powers
Frequency band
B1
G2
H5
H7
K5
278 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) is supplied in
Forward power (318 command)
2600 to 3400
3100 to 3800
3200 to 3900
3300 to 4000
2000 to 2800
Figure 11.5. Data required for the first task
Reverse power (319 command)
< 500
< 600
< 700
< 900
< 500
TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
Table 11.3.