ing the mating connector attached to J2 and rocking the
a. Carefully slide the coupler into the radome.
assembly. If a screw driver is used to loosen the coupler
assembly, the gasket may be damaged.
Make sure that the spring at the top of variable capacitor
is not damaged.
Reassembly of Coupler Assembly A1 and
b. Make sure that all 14 holes are aligned
Radome Assembly A2.
when the coupler and radome assemblies are together.
Secure the assemblies with the fourteen (14) screws
Be sure that the coupler
gasket is properly in
place to insure a good
Section IV. DIRECT SUPPORT TESTING PROCEDURES
Tests must be performed in an area free of externally
generated RF fields (no nearby antennas or transmitting
a. Testing Procedures. Testing procedures
sources). Tests must be performed outdoors, away from
are prepared for use by direct support personnel to
nearby metal structures, or in a very large room with no
determine acceptability of repaired signal equipment.
nearby metallic obstructions.
These procedures set forth requirements that repaired
signal equipment must meet before it is returned to the
When testing antenna
using organization. The testing procedures may also be
model 437S-1B, replace
used as a guide for the testing of equipment during
R9 on circuit board Al
A summary of the
resistor or connect a
b. Test Instructions.
Comply with the
instructions preceding the body of the chart before
Remove resistor when
proceeding to the tests. Perform each test in sequence.
testing is complete.
Do not vary the sequence. For each step, perform all the
actions required in the test equipment control setting
3-11. Physical Tests and Inspection
column; then perform each specific test procedure and
a. Test Equipment and Materials. None.
verify it against its performance standard. If an antenna
b. Test Connections and Conditions. None.
is below standard on any test, refer to the
troubleshooting chart in section II.
3-10. Special Requirements
Inspect radome for cracks, chips,
Radome should be free of cracks,
chips, or breaks.
Inspect coupler for loose or missing
Screws are tight; none missing.
(4) Power Supply.
b. Test Connections and Conditions. Connect
a. Test Equipment and Material.
plane. Turn on the equipment and allow 5-minute
(2) Maintenance Kit MK-1035/ARC-131.
warmup before proceeding.
Measure forward and reflected
Reflected power is less than 25% of
power at 30 MHz. Divide reflected
FWD on 10-W SCALE.
power by forward power and