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C3, TM 11-6625-623-45
5-4. General Test Requirements
f. Connect the ME-26B/U between the red and
gray tip jacks of the DT-278/URC (red tipjack is
Depot overhauls standards consist of per-
common). The ME-26B/URC should indicate no
formance of the tests indicated in paragraphs
less than 1 volt dc.
4-4, 4-5, and 4-6 and the following tests. The
following tests consist of signal level measure-
5-8. Test of Extender, Module MX-4892/
ments and continuity checks. Paragraphs 4-4, 4-5,
URC (If Translator Module Extender)
and 4-6 cover tests of the TS-1956/URC (fig. 4-11),
(fig. 3-12, 3-13, 4-8 and 4-12)
the function test set.
a. Set the output frequency of the signal
5-5. Test of Voltage Divider TS-1954/
generator to 500 kc.
URC (2 to 8 mc capacity divider)
b. Connect the 6-db pad between the signal
(fig. 3-2 and 4-3)
generator and the ME-30A/U; use the CG-
2727/U to connect the 6-db pad to the ME-30A/U.
a. Set the output frequency of the AN/GRM-50
c. Adjust the signal generator for an output of
(signal generator) to 5 mc.
0.07 volt.
b. Connect the 6-db pad between the signal
d. Disconnect the ME-30A/U from the CG-
generator and the ME-30A/U.
2727/U and connect the CG-2727/U to the
c. Set the signal generator output for a 5 mc, .33
MX-4892/URC RF LOAD BNC connector.
volt output.
e. Connect the ME-30A/U between the MX-
d. Connect the input terminal of the TS-1954/
4892/URC blue tipjack and the frame.
URC to the output of the 6-db pad and connect the
f. Adjust the capacitor on the side of the
M E - 3 0 A / U to the output terminal of the
MX-4892/URC to an indication on the ME-
TS-1954/URC.
30A/U of a peak of 0.055 volt 0.005.
e. ME-30A/U should indicate 0.01 volt 10%
g. Disconnect the MX-4892/URC from test
(0.009 to 0.011 volt).
setup and test continuity of remaining circuits
5-6. Test of Voltage Divider TS-1955/
(fig. 4-12).
URC (8 to 30 mc capacity divider)
(fig. 3-3 and 4-4)
5-9. Test of Dummy Load, Electrical DA-
a. Set the output frequency of the signal
340/URC (Rf Translator Load)
generator for 19 mc.
(fig. 3-4 and 4-5)
b. Connect the 6-db pad between the signal
I
a. Connect a 6-db pad to the signal generator
generator and the AN/URM-145.
output .
c. Set the signal generator output for a 19 mc,
b. Connect the AN/URM-145 to the signal
.35 volt output.
generator output with the UG-274B/U connector.
d. Connect the input terminal of the TS-
c. Set the signal generator for a 2 MHz 3 volt
1955/URC to the output of the 6-db pad and
output.
connect the AN/URM-145 to the output terminal
d. Connect the UG-274B/U connector to the
of the TS-1955/URC.
DA-340/URC connector associated with the blue
e. AN/URM-145 should indicate 0.01 volts
tipjack using the 4 to 12 inch fabricated cable.
0.001.
e. Check that the AN/URM-145 indicates not
5-7. Test of Detector, Radio Frequency
less than 2.90 volts.
DT/278/URC (Neutralizing Detector)
f. Set the frequency of the signal generator to 30
(fig. 3-5 and 4-6)
mc and disconnect the DA-340/URC from the
a. Set the output frequency generator to 500 kc.
UG-274B/U.
b. Connect the 6-db pad between the signal
g. Set the signal generator output level to 3
generator and the ME-30A/U.
volts.
c. Set the signal generator for a 500 kc, 1 volt
h. Connect the DA-340/URC to the UG-274B/U
output.
as indicated in d above.
d. Disconnect the ME-30A/U.
i. The AN/URM-145 should not indicate less
I
e. Connect the DT-278/URC red lead to the
than 2.2 volts.
common terminal of the 6-db pad and the gray
j. Check that resistance between J1 and P1 and
lead to the positive terminal of the 6-db pad.
between J2 and P2 is less than one (1) ohm.
32.3

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