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Page Title:
Coupler, Radio Frequency Interference CU-897/URM-85 |
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|  p o s t and check for secure mechanical grip-
couple the output from the center conduc-
ping action. Apply the output of the CU-
tor of Cord CG-55B/U (supplied with the
896/URM-85 from J2701 (fig. 84) to main
signal generator) to a 2-inch length of wire.
unit front-panel SIGNAL INPUT jack J705
Strip the insulation off the last 1/4 inch of
wire and insert it in the hole provided on
( f i g . 79), and proceed as directed in the
following chart:
t h e ungrounded binding post, when de-
p r e s s e d . Release pressure of the binding
cable of tuning unit 4 signal generator and
c. Coupler, Radio Frequency Interfer-
the 500-ohm input impedance of the coupler
A l t h o u g h the CU-897/URM-85 (center of
may cause degradation of the signal. This
m i s m a t c h will result in a smaller indi-
i m p e d a n c e audio-signal or powerline two-
cation, on the main unit panel meter and in
wire networks, a comparative check of its
t h e monitored headset audio sigal, than
o p e r a t i n g efficiency can be obtained by
t h a t obtained with the CU-896/URM-85.
proceeding in a similar manner to b above.
P r o c e e d as follows:
The mismatch between the 50-ohm output
is established that the source of possible
trouble in the main unit and in the tuning
o f checking the operation of Couplers,
Antenna CU-893/URM-85 and CU-894/
check for possible trouble within the
URM-85 is outlined in paragraph 43c, steps
c o u p l e r s as follows:
5 through 44; TM 11-6625-351-12. lifter it
175
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