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Page Title:
Sectionalization Test Using AN/UPM-137A-cont. |
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 e. Sectionalization Test Using AN/UPM-137A.
Control settings
Equipment
Normal
Paragraph
Step
Test equipment
under test
indication
Procedure
reference
CAUTION
ME 26/U
1
If any indication during steps 1
SELECTOR SWITCH:
through 3 appears abnormal due to a
+ RANGE: 30
short circuit, shut off the equipment
and refer to paragraph 3-5. A short
circuit may cause further equipment
damage.
a. None.
MODE: 1
b. Turn on equipment. Allow S minutes warmup
b. +283 vdc.
FUNCTION: SYSTEM
time. Connect &test probe to A13TP4.
ISLS: OFF
c. Connect dc test probe to test A13TP3. Ob-
c. +12 1 vdc.
serve meter indication. Change ME 26A/U
SELECT SWITCH to
d. Connect the dc test probe A13TP1 and ob-
d. -12 1 vdc.
serve the meter indication.
a. Turn off the test set and connect the equip-
a. None.
same as step 1 . . . . . . . . .
AN/USM-207
2
ment as shown in figure 3-2.
DIRECT HETRODYNE
b. Turn on the AN/USM-270A and CM-
b. None.
switch
77A/USM. Permit a 1-hour warmup
Hetrodyne
period.
VOLTAGE Switch
c. Turn on the test set and permit a 2-minute
c. None.
10V
warmup period.
F R E Q TUNINGMC:
d. Press and turn the test set PUSH TO TEST
d. None.
150
switch to LOCK. On the test set ground
POWER TRACK
TPA4TP5.
FUNCTION FREQ
SENSITIVITY:
PLUG IN
CM-77A/USM
POWER ON
a. None.
....................
.....................
8
MEGACYCLES control near 206 and
adjust the control until the units display
indicates a zero heat.
b. 1,030 mHz
b. Multiply the AN/UMS 207 indication by 6
206 kHz.
to obtain the transmitter frequency.
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