5-16 888-2595-001 12/20/11WARNING: Disconnect primary power prior to servicing.Section 5 Maintenance and Alignments ZX SeriesTable 5-3 LOAD TEMP test point scale5.4.2 Forward Power Meter CalibrationUse this procedure to adjust the transmitter forward power meter on either the amplifierchassis door or the system metering assembly, based on calibrated readings from anexternal precision measuring instrument such as a calorimetric load, through-line typewattmeter, or precision coupler with average power meter.Tools required:Calorimetric load orPrecision directional coupler and average power meter orCalibrated through-line type wattmeterSmall adjustment screwdriverMax loadtemperature(degrees C)LOAD TEMP testpoint (volts)0 0.1210 0.1320 0.1525 0.1630 0.1835 0.2040 0.2245 0.2550 0.2855 0.3260 0.3665 0.4170 0.4775 0.5480 0.6285 0.7190 0.8195 0.92100 1.06105 1.20110 1.37115 1.56120 1.77125 2.00formula: T( o C) = 40.858Ln(V) + 98.751
