User Manual

PINEAPPLE TECHNOLOGY, INC. V. THEORY OF OPERATION
DTXPRO-1.2KU OPERATING AND SERVICE MANUAL
THE INFORMATION PROVIDED HEREIN IS PINEAPPLE TECHNOLOGY INCORPORATED PROPRIETARY INFORMATION AND
CANNOT BE COPIED OR DISTRIBUTED WITHOUT PRIOR AUTHORIZATION
V - 4
V -- THEORY OF OPERATION (Continued)
D. ADP500 PERFORMANCE MONITOR AND PAS SELECTOR SWITCH (Continued)
3. An RF MONITOR port (BNC) is available to connect a spectrum analyzer for monitoring the
output signal.
4. METER SELECTION SWITCHES – The rotary switches on the PAS are used to select the
appropriate PA module (PA1K) for performance display on the ADP500. The PA designations
on the ADP500 are PA5, the driver transistor device then PA1 and PA2, indicating the devices
on the left side DX500U Pallet. PA3 and PA4 indicate the current through the devices on the
right side DX500U Pallet.
The rotary switch on the ADP500 is the detail selector for the multi-meter. The various
positions are defined as follows:
PA5 Reads PA Driver device currents as selected
Typical reading in INHIBIT MODE 1.5 to 2.5 A.
Typical reading in normal transmitter operation approximately 1 to 2
amps.
PA1 to 4 Reads the individual drain currents on each device located on the pallets
located on the left and right side of the Power Amp selected.
Typical reading in normal transmitter operation is approximately 7 to14
amps.
PA6 Not used
PS VOLTS Reads DC voltage applied to PA stages Typical reading for 50 VDC
would be the center of the meter, in the green zone.
*P FWRD Reads PA output power from the mask filter in RMS percentage of rating.
Full power reading would be 100%.
*P RFLD Reads PA output power being returned from the load and displayed as a
percentage of forward power. Typical reading would be < 5% indicated.
AUX 1 AND AUX 2 Not used in this configuration.
*This feature is disabled on units used in the DTXPRO-1.2KU. This feature is displayed on the
DXDPRO-10U Modulator/Exciter front panel.