Harris Ranger Series, Руководство по вводу в эксплуатацию

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3-14 888-2685-001 12/24/07
WARNING: Disconnect primary power prior to servicing.
Ranger Commissioning Manual
Section 3 Operation and Adjustments
3.6.4.1 PA Setup (Gain Balance)
This screen is accessed by pressing the PA Setup button in Figure 3-10. Its sole purpose
is to balance the gain of the 2 PA modules in the CZ1000F transmitter. The goal is to
match the 2 module gain readings. Adjustment is only required if the module current
readings in Figure 3-11 are more than 1 amp apart. This procedure will have to be done
if a module is changed. The adjustment procedure is simple.
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.
Figure 3-11 PA Setup Screen
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.
It may be necessary to adjust the PA module phasing via the pot on the Module
Backplane board. For PA Module phasing see "3.7.2 Module Phasing Procedure" on
page 3-18.