Mag One BPR 40 Service Manual - page 43
Hardware Tuning Setup and Procedure
3-5
2.4
Receiver Tuning
2.4.1
Wide Band Sinad Tuning
1.
Set the radio to the appropriate tuning frequency (refer to Table 3-1).
2.
Set RF Signal Generator level to -47dBm at 1 kHz tone, 60% of the deviation.
3.
Find the SINAD level 7 of the radio to decrease RF Signal Generator level.
4.
Using the ceramic tool, adjust R215 clockwise to off the audio output.
5.
Then adjust R215 counterclockwise at the point where the Audio Frequency signal appears
(refer to Figure 3-2).
2.4.2
Narrow Band Sinad Tuning
1.
Set the radio to the appropriate tuning frequency (refer to Table 3-1).
2.
Set RF Signal Generator level to -47dBm at 1 kHz tone, 60% of the deviation.
3.
Find the SINAD level 7 of the radio to decrease RF Signal Generator level.
4.
Using the ceramic tool, adjust R216 clockwise to off the audio output (refer to Figure 3-2).
5.
Then adjust R216 counterclockwise at the point where the Audio Frequency signal appears.
2.4.3
PLL Synthesizer Tuning
Rx PLL Frequency Tuning
1.
Set the radio to the appropriate tuning frequency (refer Table 3-1).
2.
Detect output voltage at test point TP1 (refer to Figure 3-3).
3.
Using the ceramic tool, adjust C710 to tune the voltage to 5.2V +/-0.1V (refer to Figure 3-4).
Figure 3-4 Bottom Side of PCB
R425
R216
R215
R426
C722
C710
FL701