Harris ZX10 - Forward Power Meter Calibration

5-16 888-2595-001 12/20/11
WARNING: Disconnect primary power prior to servicing.
Section 5 Maintenance and Alignments
ZX Series
Table 5-3 LOAD TEMP test point scale
5.4.2 Forward Power Meter Calibration
Use this procedure to adjust the transmitter forward power meter on either the amplifier
chassis door or the system metering assembly, based on calibrated readings from an
external precision measuring instrument such as a calorimetric load, through-line type
wattmeter, or precision coupler with average power meter.
Tools required:
Calorimetric load or
Precision directional coupler and average power meter or
Calibrated through-line type wattmeter
Small adjustment screwdriver
Max load
temperature
(degrees C)
LOAD TEM P test
point (volts)
00.12
10 0.13
20 0.15
25 0.16
30 0.18
35 0.20
40 0.22
45 0.25
50 0.28
55 0.32
60 0.36
65 0.41
70 0.47
75 0.54
80 0.62
85 0.71
90 0.81
95 0.92
100 1.06
105 1.20
110 1.37
115 1.56
120 1.77
125 2.00
formula: T(
o
C) = 40.858Ln(V) + 98.751