User's Manual
PINEAPPLE TECHNOLOGY, INC.
UTX2.5K ULTRA Operating and Service Manual
lV -- TRANSMITTER TURN-ON PROCEDURE
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. Turn-on Main AC breaker located in the house service sub-panel.
6.
Turn-on the Main AC breaker located on the two (2)
A
CDIS2 Power Distribution panel located
on the front of Transmitter. A green light should come on indicating power is on.
7.
Turn-on the AC Switch located on the front of the
A
DP500. The indicating lights should be on
and ready for operation.
8.
Turn-on the AUX Breaker located on the
A
CDIS2 front panel. The PA fans and rack exhaust
fans should come on.
9.
Turn-on the AC Power breakers located on the front panel of the ACDIS2. Check the
A
C2009
power modules, three (3) each, to see if the green lights are lighted indicating normal operation.
10.
Using the
A
DP500 and PAS3, check the idling currents on each PA to ensure that the
currents are in the correct range. Typical range is 0.5 to 2.5 amps. See
A
DP500 Operating
Section for details.
NOTICE: The Modulator has been set at the factory so that the output power indication on the
A
DP500 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.
11. Locate the output level adjustment on the modulator and turn the level down to minimum or CCW.
12. Turn-on the power switch located on the modulator rear panel.
13.
A
pply 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
A
PD500 meter until it reads to 50%.
15. Using the ADP500 reflected power indication, check the LOAD reflected power. This should be
less than 5% reflected.
16. Return to the PA current readings on the ADP500 to verify that all the currents are approximately
the same.
17. 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 5% of output p-sync power as indicated on the ADP500.
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