Table of Contents
Advertisement
ALIGNMENT AND TEST PROCEDURES
3. Adjust power limit control R76 clockwise until
power is limited to 0.55 dB above 85W (95W). If
the maximum PA power is < 95W, adjust R76 until
power begins to decrease.
7.4.4 REFLECTED POWER ADJUST
1. Remove the load cable from A8.
2. Press the space bar to key the PA.
NOTE: This will not harm the PA.
3. Adjust Reverse Power Calibration Pot R680 for
equal voltages on W126 and W121 on the RFIB or
for equal Forward and Reverse Power.
4. Press the space bar to unkey the PA.
5. Apply "Glyptol" to R663, R680 and R76.
6. Press F4 to turn on/off fans. Both PA fans should
turn ON.
7. Measure temperature detector voltage at W127 on
the RFIB. Normal output at 25°C ambient is
approximately +1.0V DC.
A8
October 1999
Part No. 001-2009-201
R663
R680
Figure 7-3 POWER AMPLIFIER ALIGNMENT POINTS
B
C
Q503
B
R509
B
C
Q502
B
7-6
B
E
B
B
E
B
B
B
Q501
C
E
B
B
1
2
U501
3
4
Advertisement
Table of Contents
