Tait TB7100, Service Manual

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TB7100 Service Manual Transmitter Fault Finding (25W) 261
© Tait Electronics Limited October 2005
Table 13.8 RF voltages along the initial RF signal path of the VHF radio (B1 band)
Power level
(W) Frequency
(MHz)
RF voltages (V)
Synthesizer
output Buffer
output Exciter
output Driver
output
1 136
155
174
0.3 ± 0.1
0.3 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.3 ± 0.1
0.2 ± 0.1
2.4 ± 0.5
2.5 ± 0.5
2.6 ± 0.5
1.8 ± 0.5
1.0 ± 0.5
1.5 ± 0.5
5 136
155
174
0.3 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.3 ± 0.1
0.2 ± 0.1
2.5 ± 0.5
2.6 ± 0.5
2.6 ± 0.5
3.0 ± 0.5
1.5 ± 0.5
2.6 ± 0.5
12 136
155
174
0.3 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.3 ± 0.1
0.3 ± 0.1
2.5 ± 0.5
2.6 ± 0.5
2.7 ± 0.5
4.2 ± 0.5
2.0 ± 0.5
3.8 ± 0.5
26 136
155
174
0.3 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.3 ± 0.1
0.3 ± 0.1
2.4 ± 0.5
2.4 ± 0.5
2.5 ± 0.5
3.3 ± 0.5
1.7 ± 0.5
4.5 ± 0.5
40 136
155
174
0.3 ± 0.1
0.2 ± 0.1
0.3 ± 0.1
0.4 ± 0.1
0.4 ± 0.1
0.3 ± 0.1
2.5 ± 0.5
2.5 ± 0.5
2.5 ± 0.5
8.2 ± 0.5
5.5 ± 0.5
7.7 ± 0.5
Table 13.9 RF voltages along the initial RF signal path of the UHF radio (H5 and H6 bands)
Power level (W) Frequency (MHz) RF voltages (V)
H5
band H6
band Synthesizer
output Buffer
output Exciter
output Driver
output
1 400
435
470
450
490
530
0.2 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.3 ± 0.1
0.3 ± 0.1
0.4 ± 0.1
4.5 ± 0.5
4.6 ± 0.5
3.9 ± 0.5
2.3 ± 0.5
1.5 ± 0.5
0.8 ± 0.5
5 400
435
470
450
490
530
0.2 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.3 ± 0.1
0.4 ± 0.1
0.4 ± 0.1
4.6 ± 0.5
4.6 ± 0.5
3.6 ± 0.5
3.6 ± 0.5
2.6 ± 0.5
1.2 ± 0.5
12 400
435
470
450
490
530
0.2 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.3 ± 0.1
0.3 ± 0.1
3.9 ± 0.5
4.0 ± 0.5
3.4 ± 0.5
4.5 ± 0.5
3.9 ± 0.5
1.7 ± 0.5
26 400
435
470
450
490
530
0.2 ± 0.1
0.1 ± 0.1
0.1 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
3.8 ± 0.5
3.6 ± 0.5
3.0 ± 0.5
4.6 ± 0.5
4.5 ± 0.5
1.8 ± 0.5
40 400
435
470
450
490
530
0.2 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
0.3 ± 0.1
0.3 ± 0.1
0.3 ± 0.1
4.2 ± 0.5
3.6 ± 0.5
3.2 ± 0.5
8.6 ± 0.5
8.2 ± 0.5
2.5 ± 0.5