User's Manual

PINEAPPLE TECHNOLOGY, INC.
UTX3K ULTRA Operating and Service Manual
lV -- TRANSMITTER TURN-ON PROCEDUR
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lV --- 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
Pineapple 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 loose 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 switched to ensure that they are all in the OFF
position.
5. Verify AC switch on the UDR100AC is in the OFF
position.
6. Locate the output level adjustment on the MA1000 Modulator and turn the level down to minimum
or CCW (Note: This is a multi-turn potentiometer)
7. Turn-on Main AC breaker located in the house service sub-panel.
8. The MA1000 Modulator should come on at this point. Verify the correct channel number appears
on the modulator front panel and the frequency lock LED is lighted.
9.
Turn-on the AC Main breaker located on the ACDIS2
Power Distribution panel. A light should come
on indicating power is on.
10.
Turn-on the AC Switch located on the front of the ADP500
. The indicating lights should be on
and ready for operation.
11.
Turn-on the AUX (FAN) Breaker(s) located on the ACDIS2
front panel. The PA fans and rack exhaust
fans should come on.
12.
Turn-on the AC Power breakers located on the front panel of the ACDIS2. Check the AC2009
power modules, three (3) each, to see if the green lights are lighted indicating normal operation.
13.
Using the ADP500
and PAS4, 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 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 supplied 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.
14. Turn-on the power switch located on the UDR100AC front panel.
15. Apply a video signal (1 volt P-P) to the video input terminal.
16. Verify the display rocker switch on the MA5000 Modulator is in the VIDEO or down position and
three (3) green bars appear on the display bar graph.
17. Slowly increase the output level adjustment while watching the RF Output level on the
APD500
meter until it reads to 50%.
18. Using the ADP500 reflected power indication, check the LOAD reflected power. This should be
less than 5% reflected.
19. Return to the PA current readings on the ADP500 to verify that all the currents are approximately
the same.
20. With successful performance to Step 17, the transmitter output power can be increased using the
output level adjustment on the modulator to achieve 100%. The aural power can be added at this
time not exceeding 10% of output p-sync power as indicated on the ADP500.
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