12/24/07
888-2685-001
2-25
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation Verification &
Ranger Commissioning Manual
NOTE:
This adjustment should only be done at full power and after the module tempera-
tures have had time to stabilize. PA Module phasing should always be optimized
after finishing this procedure.
STEP 1
Press the RESET button. This allows the adjustment to always start from
a common point.
STEP 2
Use the Left and/or Right arrow buttons until the numbers match. There
will be some bounce in the readings, but they should be as close as
possible and no more than 1 amp apart.
NOTE:
This adjustment is not to be used to decrease the PA module combiner reject
power. In some cases this adjustment may actually increase the PA module com-
biner reject power by a few watts.
Figure 2-14 PA Setup Screen
Check the PA Module Phasing (press Output, Output Service). The Reject Load
Power (relative) reading should be less than 0030 with the gain button set to low (at full
rated power). If not, refer to "3.7.2 Module Phasing Procedure" on page 3-18, before
proceeding, then return here to finish the installation.
Make sure the PA and HPF correctors are turned ON on the APEX exciter and
check transmitter performance. Refer to the APEX exciter manual 888-2604-001 for
settings.
NOTE:
Section 4 RF Testing outlines commissioning RF measurements.
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