GL-T8541 PA
Glenayre Document Number: 9110.01002
THEORY OF OPERATION
09/10/99
Page: 6-12
Copyright © 1997 Glenayre
6.7.5 Metering Board Regulators and Test Points
The metering board has voltage regulators which supply power to circuits on the metering
board. Refer to Table 6-4 for the metering board test points, voltages, and regulators; and
to Figure 6-7 for metering board component locations. Refer to Figure 6-10 and
Figure 6-11 for both pages of the metering board schematic.
Table 6-4 Metering Board Test Points
Test Point
and Color
Voltage
Regulator
Function (metering board unless specified otherwise)
TP1, black
Ground
None
Ground reference point for test point measurement
TP2, white
n/a
Reflected power input sample voltage
TP3, blue
+36 V
D12, D13, D14,
D15, and U8
Supply voltage for current sensing opamps
TP4, orange
+5 V
U18
Supply voltage
TP5, yellow
-15 V
U19 and D29
PA board negative AGC voltage.
TP6, green
+7.5 V
D16
Supply voltage for metering board AGC forward power
sensing circuits
TP7, red
n/a
Forward power input sample voltage
TP8, brown
n/a
PA AGC output sample
TP9, violet
n/a
AGC reference voltage from DSP exciter
TP10, grey
n/a
PA key input sample
