User's Manual

3-18 888-2687-001 10/19/07
WARNING: Disconnect primary power prior to servicing.
Ranger ™ Mobile Series
Section 3 Operation/Adjustments
3.7.2 Module Phasing Procedure
NOTE:
This procedure is for the CZ1000F only.
The goal is to minimize the PA module combiner reject load power reading in Figure 3-
13, by adjusting the phase of module #2. The phase of PA module #1 is fixed. The “PA
1&2” reading should be less than 0030 with the GAIN button at the bottom of the
screen set to LOW. If the GAIN button is pressed it will toggle to high, increasing the
detector gain and allowing for finer resolution when adjusting module phasing. The
reading should be less than 0100 with the GAIN set to HIGH.
STEP 1 Check the PA module gain balance on the PA Setup screen, shown in
Figure 3-11 on page 3-14. These current readings should be less than 1
amp apart. If not, refer to "3.6.4.1 PA Setup (Gain Balance)" and adjust
the module gains before proceeding with the module phasing.
STEP 2 Using a digital voltmeter, monitor the test point on the Backplane
Interface board shown in Figure 3-14.
Figure 3-14 Test Point for Module Phasing
STEP 3 Adjust R7 (the only potentiometer) on the Backplane Interface board for
minimum voltage reading on the voltmeter. This should minimize the
reading on the Output Service screen in Figure 3-13. The location of the
Backplane Interface board is shown in Figure 2-11 on page 2-21 under
the letter N.
NOTE:
The reject power should be less than 12W when finished.
Module Phasing
Test point (pad)
Phasing Adjust R7