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Page Title:
Sectionalization Test Using AN/TPM-25A-cont. |
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 Control settings
Paragraph
Equipment under test
Normal Indication
Test equipment.
reference
Step
Procedure
a. Connect the MX-2144A/U to the
6
TS
779A/U
input.
.
(Cont)
a None
b. Adjust the TS-779A/U as follows:
b. None.
(1) RANGE switch at O DBM.
(2) BOLO BIAS CURRENT switch
at 10-16 MA.
(3) LINE POWER switch at ON
and permit a 15-minute warm-
up period
(4) Adjust ZERO SET COARSE
a n d FINE controls to zero
meter.
c. None.
c. Connect the equipment as shown in
A4TP5 is grounded
d. -6 dBm 1
d. Connect the MX-2144A/U to the
t r a n s p o n d e r test PROBE jack.
Observe the power indication.
e. None.
e. Disconnect the ground from test
point A4TP5 and connect A4TP4 to
ground. Turn RANGE switch to -10
DBM.
deflects
f. M e t e r
f. Observe the power meter indication.
slightly to right
When finished with this step, remove
approximately -21
the ground from A4TP4.
dBm).
a. None
a. Perform system timing setup, step
Same as step 4.
AN/USM-281A
7
POWER ON
4 above.
b. None.
b. Connect the equipment as shown in
Sweep Display
figure 3-24. To perform transmitter
pulse characteristics test, turn on
DELAYED TIME/DIV:
5 USEC
the oscilloscope and test equipment
a few minutes warmup time.
MAIN TIME/DIV:
c. None.
c. Connect oscilloscope A INPUT to
.1 MSEC
INT/AUTO/EXT/EXT
A4TP6 and adjust tbe oscilloscope
10 AUTO
HORIZONTAL POSITION, MAIN
MAIN-SLOPE+:+
TRIGGER LEVEL, INTENSITY,
DELAYED
FOCUS, and ASTIGMATISM
SLOPE +:+
controls until a clear and stable
waveform is observed.
DIV DELAY: 35
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