TM 11-6625-2398-15-3
8-3. Modification Work Orders
a. Test Equipment and Materials.
Multimeter
The performance standards listed in the tests (para 8-4
AN/PSM-6B.
b. Test Connections and Conditions. Connect the
orders performed on the test facilities set.
equipment shown in figure 8-1 in accordance with the
directions in the steps of the procedure below.
8-4. Continuity Tests on Cables, Extender Boards
c. Procedure.
and Front Panel Test Adapter
Step
Test equipment
Equipment under
Test
Performance
No.
control settings
test control settings
procedure
standard
1
AN/PSM-6B
None
Plug test leads into multimeter and
None
Function: OHMS
short circuit free ends of test leads.
Range: R X 1
Adjust OHMS ZERO until meter
pointer reads zero on the OHMS
scale.
2
Remove short circuit on test leads of AN/
a. Connect one multimeter test lead to
a. Meter must indicate
PSM-6B and leave controls in positions given
the center conductor of one plug on
zero ohms (continuity)
in step 1.
Cable W14/W15. Connect the other
test lead to the center conductor of the
plug on the other end of the cable.
b. Connect one multimeter test lead to
b. Meter must indicate
the outer shell of one plug on cable
zero ohms (continuity)
W14/W51. Connect the other test lead
to the outer for each test shell of the
plug on the other end of the cable.
c. Perform steps a and b for the other
c. Meter must indicate
W14/W15 cable and cable W16, W21,
zero ohms (continuity) for
W16, W21, W45 and W47.
each test on each cable.
Note.
One end of cable W16 has alligator
clips, P2 is the center conductor termina-
tion and P3 is the shell shield termination.
Note.
1. Consult the schematic diagrams for cables W32, W39 through W43 and W48 (fig. 6-10, 6-11 through 6-15 and 6-18,
respectively) to perform step 3. The schematic diagrams identify the lead terminations and shields (if any) in each cable.
Perform test procedures a, b, and c below (as required) for continuity checks of cables W2, W39 through W43 and48.
2. Cable W32 is unshielded and does not have shielded leads. Therefore, test procedures a and b below are not to be
performed for this cable.
3. Cable W39 is supplied with couplers W39CP1 and W39CP2. Both couplers must be connected on cable W39 when
performing test procedures b and c below.
4. Cables W39 and W48 are unshielded. Therefore, test procedure a below is not to be performed on these cables.
5. Cable W48 is supplied with five separate coaxial p lugs and one attenuator on one end of the cable. Perform test
procedure b for each separate coaxial plug. Cable pin E will provide an approximate meter reading of 91 ohms when
performing test procedure c below, instead of zero ohms.
3
Leave controls and test leads in position in-
a. Check shielding, bonded to the
a. Meter must indicate
dicated in step 2.
shell of the plugs, by connecting
zero ohms (continuity).
one multimeter teat lead to the hell
See notes 2 and 4 above
of one plug and the other test lead
for cables W32, W39 and
to the shell of the other plug.
W48.
b. Check individual wire shielding
b. Meter must indicate
by progressively connecting the
zero ohms (continuity) for
multimeter test lead to each wire
each shield. See notes 2,
shield pin connection on the plugs
3, and 5 above for cables
at each end of the cable.
W32, W39 and W48.
c. Check continuity of cable wires
c. Multimeter must
by progressively connecting the
indicate zero ohms
multimeter test leads to the wire
(continuity) for each wire.
connecting pins on the plugs at each
See notes 3 and 5 above
end of cable.
for cables W3 and W48.
8-2
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