Service Manual Part 1

+8"  
  
+8+ #3)#9
+8+8 C)*3(#
Check that the VCO is phase locked.
Connect a frequency counter (level +10dBm) to the VCO input to the mixer (junction of
C241 and L109).
Monitor the local oscillator frequency and check that it is above or below the required
receive frequency according to the following list:
+8+8 ),C
The following table gives approximate control line voltage for receive and transmit at
the band edges.
Model Local Oscillator Frequency
T2000-100 27.7MHz below
T2000-200 10.7MHz above
T2000-300 27.7MHz above
T2000-400 27.7MHz below
2000-500 49.1MHz below
T2000-600 49.1MHz below
T2000-700/900 49.1MHz below
T2000-800 61.9MHz below
Model
Frequency
(MHz)
Receive Control Line Transmit Control Line
VCO Frequency
(MHz)
Control Line
Voltage (V)
VCO Frequency
(MHz)
Control Line
Voltage (V)
T2000-100
220
270
192.3
242.3
4.5±0.5
9.8±1
220
270
7.6±0.5
12.7±1
T2000-200
66
88
76.7
98.7
7.3±0.6
13.8±1
66
88
4.5±0.6
11±1
T2000-300
136
174
163.7
201.7
7.5±0.6
13±1
136
174
4.5±0.6
9.2±1V
T2000-400
175
225
147.3
197.3
4.5±0.6
10.6±1
175
225
7.8±0.7
13.8±1
2000-500
400
470
350.9
420.9
2.5±0.5
13±1
400
470
3±0.6
13.5±0.7
T2000-600
450
520
400.9
470.9
2.5±0.5
13±1
450
520
2.2±0.5
13.5±1
T2000-700
330
360
280.9
310.9
2.5±0.5
6.3±0.7
330
360
8.5±0.7
12.3±0.7
T2000-800
851
870
789.1
808.1
1.8±0.5
4.5±0.5
806
825
3.8±0.5
6.5±0.5
851
870
9.5±0.5
12.0±0.5
T2000-900
360
400
310.9
350.9
2±0.5
7.5±1
360
400
8±1
12.5±1