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Page Title:
Figure 54. Module A2 parts location. |
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|  Figure 54. Module A2 parts location.
(2) Adjust the AN/URM-48 frequency
diagrams and to figures 55 and 56 for test
to 30.00 mc and the level to 10
points and parts location.
m i l l i v o l t s as indicated by the
a.Preparation.
(1) Prepare the following equipment:
411A.
(3) Disconnect the 411A from J2 and
connect it between pins 3 and 4 of
(b) Frequency Meter AN/USM-26.
J1 in the module under test. Note
(d) Adapter UG-274B/U.
the output level.
(4) Compute the gain by subtracting
(e) Multimeter ME-26B/U.
the input db level noted in (2) above
(2) Connect the AN/URM-48 output to
from the output db level noted in
a male connector of the UG-274B/
(3) above. Normal gain is 16 db or
u.
greater.
(3) Connect the AN/USM-26 to the
(5) R e c o n n e c t t h e 4 1 1 A t o t e s t
other male connector of the UG-
point J2 of the m o du 1 e under
274B/U.
test.
(4) Connect the female end of the UG-
(6) Increase the AN/URM-48 level
274B/U to the receiver-transrnit-
until the 411A indicates 20 milli-
ter ANT connector.
volts .
(5) Set the AN/URM-48 frequency to
(7) Repeat the procedure given in (3)
30.00 mc; set the deviation to 10
above.
kc at 1,000 cps.
(8) D e c r e a s e the AN/URM-48 fre-
b. Gain and Bandwidth Test.
quency until the output level indi-
(1) Connect the 411A to J2 of the mod-
cated by the 411A is at the level
ule under test.
110
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