AS-3226B/URC
VTM-01-009-RevE
WARNING
4-4. SCHEDULED PERFORMANCE TESTS
.
The following procedures include the information required for checking the VSWR:
The antenna operates at up to 800 watts. Ensure that the transmitting
equipment is de-energized when performing the following test. Also make
sure the test equipment is grounded.
a. Safety Precautions. Be sure the transmitting equipment is de-energized and the test
equipment is properly grounded.
Table 4-1. Scheduled Maintenance Action Index
Periodicity
Maintenance Action
Reference
A
Inspect antenna for dirt
4-3.a
A
Check painted surfaces for wear,
chipping, etc.
4-3.b
A
Check the VSWR of the antenna
4-4
b. Tools and Test Equipment. No tools are required. The power supply, modulating
source, VHF generator, impedance bridge, standing wave indicator and electronic
counter in table 1-3 are used for this check.
c. Title of Test. The title of the test to be performed is VSWR Test.
d. Minimum Rating of Technician. A technician with a minimum rating of ETN3 can
perform this task.
e. VSWR Test Setup. Figure 4-1 shows the VSWR test setup for the antenna.
Valcom Manufacturing Group Inc
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