Tait TM8000 Series

202 Diagnosis of Faults on Main Board TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Figure 9.15 Receiver circuitry under the FE TOP can
Table 9.3 Front-end tuning voltages and corresponding DAC values
Frequency band
Tuning voltages at five different frequencies
FE TUNE0 FE TUNE1 FE TUNE2 FE TUNE3 FE TUNE4
B1 band
Frequency (MHz)
DAC value
Voltage (V)
135.9
37 ± 20
0.44 ± 0.24
145.1
88 ± 15
1.04 ± 0.18
155.1
136 ± 15
1.60 ± 0.18
164.1
174 ± 15
2.04 ± 0.18
174.1
210 ± 15
2.57 ± 0.18
D1 band
Frequency (MHz)
DAC value
Voltage (V)
215.9
42 ± 20
0.5 ± 0.2
228.1
103 ± 15
1.2 ± 0.18
241.1
151 ± 15
1.7 ± 0.18
253.1
187 ± 15
2.2 ± 0.18
266.1
224 ± 10
2.6 ± 0.12
H5 band
Frequency (MHz)
DAC value
Voltage (V)
399.9
0 to 36
0 to 0.43
417.1
94 ± 15
1.11 ± 0.18
435.1
106 ± 15
1.25 ± 0.18
452.1
156 ± 15
1.84 ± 0.18
470.1
191 ± 15
2.25 ± 0.18
H6 band
Frequency (MHz)
DAC value
Voltage (V)
449.9
41 ± 20
0.48 ± 0.24
470.1
91 ± 15
1.07 ± 0.18
490.1
134 ± 15
1.58 ± 0.18
510.1
176 ± 15
2.07 ± 0.18
530.1
210 ± 15
2.47 ± 0.18
PIN TOP CAN MEASUREMENT POINT