TM 11-5840-281-35/1
Control settings
Step No.
Test equipment
Equipment under test
Test procedure
Performance standard
b.
1500 (15000 ft.)
b.
Adjust ALTITUDE control to
0174 (1740 ft.)
position height finder cursor
on 10-mi range mark. With
ANGLE VOLTS switch
momentarily placed to EL,
strobe artificial sweep on ert
and observe that elevation and
artificial sweep (dot) coincide.
Observe indication on ALTI-
TUDE indicator.
a.
None.
a. On Pulse Generator 0-1333/
TPN-18 under test, set
ANGLE VOLTS control to
9------------------------------------------
As last indicated-------
setting recorded in step 31
above.
b.
2500 (25000 ft.)
b. Adjust ALTITUDE control to
0286 (2860 ft.)
position height finder cursor
on 15-mi range mark. With
ANGLE VOLTS switch
momentarily placed to EL,
strobe artificial sweep on ert
and observe that elevation and
artificial sweep (dot) coincide.
Observe indication on ALTI-
TUDE indicator.
NOTE. If Radar Set AN/TPN-
18 is installed at a radar site
above sea level, perform step 10
below.
a.
None.
10 ----------------------------------------
As last indicated -------
a. On Pulse Generator 0-1333/
TPN-18 under test, set ALTI-
TUDE indicator to radar site
elevation above sea level.
b.
None.
b. Disengage ALTITUDE indicator
by depressing screwdriver
adjust at right of ALTITUDE
indicator through hole in front
panel and rotate screwdriver
adjust fully ccw. Release screw-
driver adjust.
c.
Radar site elevation
c. Recheck ALTITUDE indicator
indicated by ALTITUDE
to ensure it indicates radar site
indicator when ALTI-
elevation above sea level when
TUDE control is fully
ALTITUDE control is fully
ccw.
ccw.
(3) Pulse Generator 0-1333/TPN-18 in Con-
4-20.
Testing Elevation Glidepath
trol-Indicator C-6988/TPN-18 under test pulled
Cursors
out for access to top deck controls and adjust
ments.
a.
Test Equipment and Materials Required.
(4) To facilitate this test, elevation glidepath
None.
cursor 1 and elevation glidepath cursor 2 are set
up for a 3-degree glidepath with a theoretical
b.
Equipment Conditions.
touchdown point one mile from the radar site at
the beginning of the test. If the equipment is in-
(1) Radar Set AN/TPN-18 turned on and
stalled at an operational site, the glidepath cur-
aligned.
sors are readjusted to the operational glidepaths
(2) PREC DELAY 1 control R1120 and
at the conclusion of the test.
PREC DELAY 2 control R1119 (selected by
CURSOR SELECT switch S1104) adjusted to po-
sition touchdown range mark at start of sweep.
4-49
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