PINEAPPLE TECHNOLOGY, INC.
VTX2KW-A Operating and Service Manual
IV — TRANSMITTER TURN-ON PROCEDURE
Page 6
IV — TRANSMITTER TURN-ON PROCEDURE
Before applying AC Power to the transmitter for initial turn on and check out, the installation should be
approved by a qualified broadcast engineer. The Turn on procedure that follows is recommended by Pine-
apple Technology, Inc. engineering staff:
1. Check transmitter load or antenna for proper installation and connection to the transmitter.
2. Open the transmitter and inspect all cables and wires for lose connections or broken wires in the
rack assembly
3. Check for damage to the equipment mounted in the rack.
4. Check all AC breakers and on/off switches to ensure that all are OFF.
5. TURN ON THE MAIN AC BREAKER LOCATED IN THE SUB-PANEL WHERE THE AC POWER
CORD WAS CONNECTED.
6. TURN ON THE MAIN AC BREAKER LOCATED ON THE ACDIS2 POWER DISTRIBUTION
PANEL LOCATED ON THE FRONT OF THE TRANSMITTER. A GREEN LIGHT SHOULD
COME ONE INDICATING POWER IS ON.
7. TURN ON THE AC SWITCH LOCATED ON THE FRONT OF THE ADP500. THE INDICATING
LIGHTS SHOULD BE ON AND READY FOR OPERATION
8. TURN ON THE AUX BREAKER LOCATED ON THE ACDIS2 FRONT PANEL. THE PA FANS
AND THE RACK EXHAUST FANS SHOULD COME ON.
9. TURN ON THE POWER SUPPLY BREAKERS LOCATED ON THE FRONT OF THE ACDIS2.
CHECK THE AC 2008 POWER MODULES (6) EACH TO SEE IF THE GREEN LIGHTS ARE
INDICATING NORMAL OPERATION.
10. USING THE ADP500 & PAS10 CHECK THE IDLING CURRENTS ON EACH PA TO ENSURE
THAT THE CURRENTS ARE IN THE CORRECT RANGE. TYPICAL RANGE IS 1.5 TO 2.5
AMPS. SEE ADP500 OPERATING SECTION FOR DETAILS
NOTICE: The Modulator/driver has been set at the factory so that the output power indication on the
ADP500 will show 100% or 2 KW p-sync power level. It is important to read the instruction manual sup-
plied with the modulator to locate key adjustment devices on the front panel. The output level adjustment
will be necessary for the next step in the turn on procedure.
11. Locate the level adjustment on the modulator/drive and turn the level down to minimum or CCW.
12. Turn on the power switch located on the modulator/up-converter rear panel.
13. Apply a video signal (1 volt P-P) to the video input terminal
14. Slowly increase the output level adjustment while watching the RF Output level on the
ADP500
until it reads to 50%
.