Basic Functional Check Procedure - Harris ZX2500 Technical Manual

Section 3 Operation
STEP 5
STEP 6
STEP 7
NOTE:
The power RAISE/LOWER power control setting is preserved while switching
transmitting modes. For example, if the transmitter were operating at 65% of the
maximum FM setting in FM mode, it would transmit at 65% of the maximum HD
setting after switching to HD mode.
3.4.4

Basic Functional Check Procedure

This procedure provides the operator with a basic procedure for assessing the
operational status of the ZX series transmitters. It assumes that the transmitter is
currently switched on.
STEP 1
STEP 2
STEP 3
STEP 4
NOTE:
To facilitate the evaluation of transmitter meter readings, it may be desirable to
attach a small label on or near the transmitter (or inside front door) with the nor-
mal, expected readings for forward power, reverse power, PA volts, and PA amps.
STEP 5
3-10
WARNING: Disconnect primary power prior to servicing.
RF MUTE ACTIVE alarm clears and power ramps up from zero to new
power level.
Consult Section 5 – Maintenance for power adjustment procedure if
power level in new mode is not correct.
Procedure complete.
Check front panel STATUS LED to verify that correct mode is selected
(FM, FM+HD, or HD) and light is green.
GREEN = Amplifier on and no alarms registered
YELLOW = Amplifier on but alarms reported
RED = Amplifier is off
Check forward power reading on front panel multimeter(s) and verify
transmitter is currently at desired power level.
Actuate front panel meter select button to review reverse power, PA
stage voltage, and PA stage current readings.
Compare meter readings to recorded baseline readings.
If front panel STATUS LED is not green, open amplifier chassis front
door and perform following checks:
a. Check alarm LEDs on controller board.
b. Check status of DC OK lights on PS modules.
888-2595-001
ZX Series
12/20/11