 |
|||
|
|
|||
|
Page Title:
Sectionalization Tests using AN/TPM-25A-CONT. |
|
||
| ||||||||||
|
|
 Control Settings
Step
Equipment under test
Normal indication
Procedure
Test equipment
No
2
AN/UPM-15A
(Cont.)
TRIGGER SELECT: EXT PULSE
DELAY coarse 10 s PULSE
WIDTH coarse: 10 s POSITIVE
AMPLITUDE:
Fully ccw.
3
a. ACCEPT indicator glows.
a. Continuously press transponder
test set PUSH-TO-TEST switch
so that it alternates on and off.
b. None.
AN/TPM-25A SUM
b. Rotate
ATTEN dial slowly coun
t e r c l o c k w i s e until REJECT
indicator glows.
c. None.
c. Rotate SUM ATTEN dial slowly
clockwise until ACCEPT in
dicator just goes on.
d. 9 0.1 dBm
d. Calculate power at PROBE input
by adding the SUM ATTEN dial
reading, and the 1090 MHz loss of
cable 139526.
a. None.
4
AN/USM-281A
MAIN TIME/DIV: .1 MSEC
PRESS TO TEST: LOCK
b. 36 pulses: 4 pluses, a vacant
b. Observe and count pulses of mode 4
DELAYED TIME/DIV: 10 SEC
spot and 3 2 p u l s e s .
challenge on oscilloscope A
INPUT.
c. Measure amplitude of first and last
c. 10% maximum difference in
amplitude between the
pulses and determine per-
centage of difference.
two pulses.
set
d. On
AN/USM-281A,
d. None
D E L A Y E D TIME/DIV to 1
SEC and adjust DIV DELAY
So that the first two pulses of the
challenge train may be observed.
e. 2 0.07 s
e. Using the 1 s markers displayed
on B INPUT, measure the pulse
spacing between the first two
pulses. (Measure from leading
edge to leading edge.)
f. 0.5 0.1 s
f. Measure pulse width of first pulse.
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals