TM 11-5840-281-35/1
Control settings
Step No. Test equipment Equipment under test
Test procedure
Performance standard
b. On elevation electronic filter
b. None.
HV: OFF
(first plug-in card looking at
Drive motor Amplifier
front of receiver-transmitter)
AZ DRIVE POWER:
connect vtvm COMMON
ON
test lead to GRD testpoint
Master Pulse
TP701 and DC test lead to
ANGLE VOLTS testpoint
O-1333/TPN-18
TP703.
SCAN MODE: NORM
c. Observe indication on vtvm-----------------
c. 0 vdc.
SCAN: OFF
d. By manually moving the
d. None.
ANGLE VOLTS:
elevation Antenna AS-1291/
OPERATE
TPN-8, position azimuth
Master Control-
Antenna AS-1292/TPN-8 cw
Indicator
from 0 to a scan angle of 15
C-0988/TPN-18
right as indicated on scan
FOCUS: Fully ccw
protractor.
INTENSITY: Fully ccw
e. Remove vtvm DC test lead
e. None.
POWER: ON
from ANGLE VOLTS test-
point TP709 and connect to
ANGLE VOLTS testpoint
TP703 on azimuth electronic
filter (second plug-in card
looking at front of Radar
Receiver-Transmitter RT-
818/TPN-18).
f. On azimuth electronic filter
f. 0 vdc.
adjust OFFSET control.
Observe indication on vtvm.
g. Disconnect vtvm teat leads from
g. None.
electronic filters.
h. Remove clinometer from eleva
h. None.
tion Antenna AS-1291/TPN-
a. Connect oscilloscope CHAN-
a. None.
NEL A INPUT test lead to
PRE TRIGGER testpoint
Oscilloscope
2
As last indicated ------
TP211 on radar transmitter.
POWER: ON
b. Adjust oscilloscope HORIZOB
b. None.
CHANNEL A VERTICAL
TAL POSITION and VERTI
POSITION: Midposition
CAL POSITION controls to
HORIZONTAL POSI-
obtain a sweep on the oscillo-
TION: Midposition
scope.
HORIZONTAL DISPLAY
c. On radar transmitter, adjust
c. 83040 sec.
INTERNAL SWEEP
PRF ADJ control R247 for al
MAGNIFIER: X1
interpulse period of 830 (40
EXTERNAL VERNIER:
sec as indicated on oscilloscope
CAL
NOTE. Do not replace covers
SWEEP TIME MILLI-
on Radar Receiver-Transmitter
SECONDS/CM: 0.1
SWEEP TIME VER-
RT-818/TPN-18 until tests are
NIER: CAL
completed.
TRIGGER SLOPE: -
TRIGGER LEVEL: As
required
SWEEP MODE: PRESET
TRIGGER SOURCE:
INT
Vertical presentation:
CHANNEL A
CHANNEL A, SENSI-
TIVITY (VOLTS/
CM): 2
CHANNEL A SENSI-
TIVITY VERNIER:
CALIBRATED
CHANNEL A AC-DC:
DC
4-9
Previous Page
