TM 11-5840-281-35/1
Control settings
Step No.
Test equipment
Equipment under test
Test procedure
Performance standard
switch set at 050 without
readjustment of TD 2 con-
trol R1125 and GP 2 control
R1181.
No appreciable difference
On top deck of Pulse Generator 0-
9
...............................
As last indicated, except:
between glidepath cursor
Pulse Generator
1833/TPN-18, place CURSOR
2 and glidepath cursor
SELECT switch S1104 back and forth
O-IJSSS/TPN-18
1 (cursor 2 should be
to positions 1 and and 2 while
under test
superimposed on cursor 1).
observing glidepath cursor 1 and 2 on
ANGLE VOLTS switch:
elevation scan.
OPERATE
SCAN switch: ON
10
...............................
As required
Realign elevation glidepath cursors to
operational requirements if Radar Set
AN/TPN-18 is an installed operational
equipment.
Refer to TM 11-5840-281-12 for alignment
instructions.
(3) Pulse Generator O-1333/TPN-18 in Control-
4-21. Testing Azimuth Courseline Cursors
Indicator C-6988/TPN-18 under test pulled out for access
a. Test Equipment and Materials Required.
to top deck controls and adjustments.
None required.
(4) To facilitate this test, azimuth courseline
b. Equipment Conditions.
cursor 1 and azimuth courseline cursor 2 are set up for a
(1) Radar Set AN/TPN-18 turned on and aligned.
theoretical parallel courseline with an offset distance of
(2) PREC DELAY 1 control R1120 and PREC
500 feet in both left-of-runway and right-of-runway
DELAY 2 control R1119 (selected by CURSOR SELECT
operation at the beginning of the test. If the equipment is
switch S1104) adjusted to position touchdown range
installed at an operational site, the azimuth courseline
mark at start of sweep.
cursors are readjusted to the operational courselines at
the conclusion of the test.
c. Procedure.
Control settings
Step No.
Test equipment
Equipment under test
Test procedure
Performance standard
...............................Radar Receiver-
a. On Control-Indicator C-6988/TPN-18
a. None.
1
Transmitter RT-818/
under test, adjust INTENSITY and
FOCUS controls for normal operating
TPN-18 control panel
level and definition.
MAIN POWER: ON
b. Observe beta scan for normal azimuth
b. Normal 80 azimuth beta
SCAN: ON
presentation.
scan with range marks
Master Control-Indicator
and courseline cursor at
C-6988/TPN-18 and
normal operating intensity
Pulse Generator
level.
O1S-i /TPN-18
POWER: ON
TRANSMITTER: OFF
c. On top deck of Pulse Generator O-
c. Touchdown range mark
SCAN MODE: NORM
visible at start of sweep.
1383/TPN-18 under test, place
SCAN: ON
CURSOR SELECT switch S1104 to 1 or
Control-Indicator
2 as applicable, and
RUNWAY
C-6988/TPN-18 and
switch S1109 selected by CURSOR
Pulse Generator
SELECT switch to R. Observe that
O-ISSs/TPN-18
touchdown range mark is positioned
under test
at start of sweep.
ANGLE VOLTS switch:
OPERATE
VIDEO GAIN: Fully
ccw
4-52
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