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|  TM 11-5820-695-35
d.
Procedure.
Control setting
Step
Test
No.
equipment
Equipment under test
Test procedure
Performance standard
1
AN/USM-2r07
N/A
a.
Disconnect coaxial cable 1A6W2
a.
None.
SENSITIVITY: PLUG-IN
from the J1 connector on radio
FUNCTION: FREQ
transmitter modulator 1A8.
Time base switch: GATE
b.
Disconnect coaxial cable 1A8W1
b.
None.
TIME (SEC -1) -10'
from the A1J1 connector on
DISPLAY: Desired display
transmitter frequency mixer
time
stage 1A9.
Converter attenuatorswitches:
c.
Connect the equipment as shown
c.
None.
10V MAX
an A, figure 3-28 Note that
DIRECT-HETERODYNE:
the Tee Connector is also
HETERODYNE
connected to A1J1 on 1A9.
Mixing frequency selector
d.
Observe the LEVEL METER on
d.
None.
switch: 100
AN/USM-207. If it reads in the
green zone, proceed to f below.
Otherwise, proceed to a below.
e.
Alternately set the upper and
e.
None.
lower converter attenuator
swatches on AN/USM-207 to
the left, one position at a time,
until LEVEL METER indication
is in the green zone.
f.
Observe digital display on AN/
f.
Digital display on AN/ SM-(
U
USM-27.
shell be 50 MHz 20 kHz.
g.
Disconnect the AN/USM-207
g.
None.
and connect cables 1A8W1 to
1A9A1J1 and 1A6W2 to
1A8J1.
2
Same as step 1, except: Set
N/A
a.
Set the controls on electrical
a.
None.
mixing frequency selector
frequency synthesizer 1A14 to
witch to 250.
4490.0 MHz.
b.
Disconnect coaxial cable 1A15W16
b.
None.
from the J8 connector on electrical
frequency synthesizer 1A14.
c.
Connect the equipment as shown
c.
None.
in B, figure -(8.
d.
Observe the LEVEL METER on
d.
None.
AN/USM-207. I It reads in
the green zone, proceed to f
below. Otherwise, proceed to
e below.
e.
Alternately set the u per and
p
e.
None.
lower converter attenuator
Change 3
3-88
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