AS-3226C/URC
VTM-07-00
7
Valcom Manufacturing Group, Inc.
8
WARNING
4-4. SCHEDULED PERFORMANCE TESTS
. The following procedures include the
information required for checking the VSWR:
The antenna operates at 1000 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 deenergized 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.
