Technical Manual

PINEAPPLE TECHNOLOGY, INC.
UTX3KW-A Operating and Service Manual
Page 57
VIII — ADJUSTMENTS AND TUNING
3. GAIN & PHASE MATCHING: Each U600LDV-2 comes with a circuit for making Gain and Phase
adjustments. This adjustment is xed tuned for the channel of this transmitter. Adjustment to these
circuits require the following equipment:
• HP 8508A VECTOR VOLTMETER
• BIRD THRU LINE WATT METER
• SPLITTER
• 2ea DIRECTIONAL COUPLERS
• 2 ea. 500 watt terminations
• Component selection charts for resistors
• Component selection chart for capacitors
Component selection charts and setup block diagram provided as needed. Recommended tuning
should be within +/- 0.15 dB and +/- 3 degrees as measured on the HP 8508A.
D. PHASE MATCHED CABLES: The cables used to connect the splitter to the PA Amplier inputs
and those provided to connect the PA Ampliers to the combiner are phase matched. If a cable
is damaged and needs to be replaced, additional cables are available from Pineapple Technology,
Inc. The customer may manufacture additional cables, however the same coax type with the same
connector types should be used. The phase matching procedure listed above may be used for
adjusting the lengths. Matching should be within +/- 2 degrees.
E. ADP500/1000 WATT METER: This unit comes calibrated from the factory for the rated power
level of the transmitter. Adjustments are not recommended in the eld.