TM 11-5840-281-35/1
Control settings
Step No. Test equipment Equipment under test
Test procedure
Performance standard
a. None.
a. Connect differential voltmeter
Differential voltmeter As last
7
negative (-) test lead to GRD
indicated -----
testpoint TP101 on Radar
RANGE: 50
Receiver-Transmitter RT-818/
A: 2
TPN-18.
B: 8
b. None.
b. Connect differential voltmeter
C: 0
positive (+) test lead to +28v
D:0
test point on TP102 Radar
E: 0
Receiver-Transmitter RT-818/
NULL: VTVM, 10 to 1
TPN-18.
in progressive steps.
c. +26.6 vdc min. +29.4
c. On differential voltmeter, adjust
Polarity: +
vdc max.
A, B, C, D, and E controls for
a null on meter. Observe indi-
cation on controls.
d. None.
d. Disconnect differential volt-
meter test leads.
4-6. Testing Ferrite Switch and
(2) Multimeter ME-26A/U (vtvm)
Ferrite Attenuators
b. Equipment Conditions.
(1) Radar Set AN/TPN-18 turned on.
a. Test Equipment Required.
(2) Front and rear covers removed from
(1) Electronic Voltmeter ME-202A/U (dif-
Radar Receiver-Transmitter RT-818/TPN-18.
ferential voltmeter).
c. Procedure.
Control settings
Step No. Test equipment Equipment under test
Test procedure
Performance standard
a. None.
a. Position elevation Antenna
Radar Receiver-
1
Vivm
AS-1291/TPN-8 by hand to
Transmitter RT-818/
SELECTOR: +
the approximate center of the
TPN-18 control panel
RANGE: 80v
-1 to +10 deg scan.
SCAN: OFF
b. +28 vdc indication on
b. Connect vtvm COMMON test
HV: OFF
vtvm (this is the eleva-
lead to chassis ground and DC
LO ATTEN: Fully cw
tion condition).
test lead to AZ-EL RELAY G
MAIN POWER: ON
test point TP4003 on Remote
Drive motor amplifier
Switching Control C-6989/
AZ DRIVE POWER:
TPN-18. Observe vtvm indica-
ON
tion.
Master Control-Indicator
c. None.
c. Disconnect vtvm test leads
C-6099/TPN-18
FOCUS: Fully ccw
INTENSITY: Full ccw
POWER: ON
Pulse Generator
O-1333/TPN-18
SCAN: OFF
SCAN MODE: NORM
a. None.
a. Connect differential voltmeter
Differential voltmeter As last
2
negative (-) test lead to
RANGE: 50
indicated----
ATTEN CUR (-) testpoint
NULL: VTVM, 50 to 1
TP4005 on Remote Switching
in progressive steps.
Control C-6989/TPN-18.
Polarity: +
b. None.
b. Connect differential voltmeter
A, B, C, D, E: as required
positive (+) test lead to
ATTEN CUR (+) testpoint
TP4006 on Remote Switching
Control C-6989/TPN-18.
4-6
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