TM 11-6625-2398-15-3
leads to the pin connectors for each wire and to its
FUNCTION
--
OHMS
shield on a plug at one end of the cable. The meter
RANGE
--
RX1
must indicate open circuit.
Refer to the referenced schematic diagrams for
(3) Check continuity of cable wires by
component wiring.
progressively connecting the multimeter test leads to the
active pins on the plugs at each end of the cable. The
meter must indicate zero ohms (continuity) for each
test lead to the center conductor of the plug on the
wire.
cable, and the other test lead to the shell of the plug.
The meter must indicate open circuit.
e. Cable W40, W41, W42, and W43.
through 6-15)
b. Cables W14/W15, W16, W21, W45, and W47 (fig.
(1) Check that the cable shielding is bonded to the
shell of the plugs, by connecting one multimeter test
(1) Connect one multimeter test lead to the center
lead to the shell of one plug, and the other test lead to
conductor of either plug, and the other test lead to the
the shell of the other plug. The meter must indicate
shell of the same plug. The meter must indicate open
zero ohms (continuity).
circuit.
(2) Repeat d(1).
(2) Connect one multimeter test lead to the center
conductor of one plug, and the other test lead to the
(3) Repeat d(2).
center conductor of the plug on the other end of the
cable. The meter must indicate zero ohms (continuity)
(4) Repeat d(3).
(3) Connect one multimeter test lead to the outer
f. Cable W48 (fig. 6-18). This cable consists of five
shell of one plug on the cable, and the other test lead to
individual coaxial cables terminated by a multipin
the outer shell on the other end of the cable. The meter
connector on one end.
must indicate zero ohms (continuity).
(1) Check coaxial shielding by progressively
NOTE
connecting the multimeter test leads to each of the
shield pins on one end of the cable and to the shell of
One end of cable W16 has alligator clips. P2
the appropriate coaxial connector on the other end. The
is the center conductor connector, and P3 is
meter must indicate zero ohms (continuity) for each
the shell connector.
shield.
(2) Check for shorting of coaxial cables by
cable wires by progressively connecting the multimeter
progressively connecting the multimeter test leads to the
test leads to the active pins on the plugs at each end of
center conductor contacts of the multipin connector and
the cable. The multimeter must indicate zero ohms
the associated shield connectors for each cable. The
(continuity) for both wires.
meter must indicate open circuit for each test.
(3) Check continuity of the center coaxial
W19 CP2 must be connected on cable W39.
conductors by progressively connecting the multimeter
test leads from the center conductor terminals of the
(1) Check individual wire shielding by
multipin connector and the center conductor of the
progressively connecting the multimeter test leads to
associated plug at the other end of the cable. Pin E to
each wire shield pin connection on the plugs at each end
AT1 will indicate approximately 91 ohms and the
of the cable. The meter must indicate zero ohms
balance of cables must indicate zero ohms (continuity).
(continuity) for each shield.
g. Extender Boards A3/A4. (fig. 6-21)
(2) Check for shorting of wires to shields by
progressively connecting the multimeter test
(1) Check for short circuits by connecting
4-4
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