TM 11-5840-281-35/1
c.
Procedure.
Control settings
Step No.
Test equipment
Equipment under test
Test procedure
Performance standard
Radar Receiver-
a.
a.
1------------------------------------------
Control-Indicator C-6988/
None.
Transmitter RT-818/
TPN-18 under test, adjust
INTENSITY and FOCUS'
TPN-18 control panel
controls for normal operating
MAIN POWER: ON
level and definition.
SCAN: ON
b.
b.
Observe beta scan for normal
Normal 10 elevation
Master Control-lndicator
elevation presentation.
beta scan with range
C-6988/TPN-18 and
marks and glidepath
Pulse Generator
cursor at normal oper-
0-1333/TPN-18
ating intensity level
POWER: ON
c.
c.
On Pulse Generator 0-1333/
Touchdown range mark
TRANSMITTER: OFF
TPN-18 under test (top deck),
visible at start of sweep.
SCAN MODE: NORM
place CURSOR SELECT
SCAN: ON
switch S1104 to 1 and observe
RANGE MILES: 10
that touchdown range mark is
Control-Indicator
positioned at start of sweep by
C-6988/TPN-18
adjusting PREC DELAY 1.
under test
d. On master Pulse Generator
d.
None.
ANGLE VOLTS switch:
0-1333/TPN-18, place SCAN
OPERATE
switch to OFF.
EL CURSOR: GP
e. On master Control-Indicator
e.
None.
VIDEO GAIN: Fully
C-6988/TPN-18, place
ccw
ANTENNA (servo) switch to
U until AZ TILT meter indi-
cates 25 deg.
a. On Pulse Generator 0-1333/
a.
None.
2------------------------------------------
As last indicated, except:
TPN-18 set ANGLE VOLTS
Pulse Generator
control to 020.
O-1333/TPN-18
b. On top deck of Pulse Generator
b.
None.
under test
O-1333/TPN-18, adjust TD
ANGLE VOLTS switch:
1 control R1124 to position
EL
cursor dot on 1-mi range mark
on artificial elevation sweep.
c. Set ANGLE VOLTS control
c
None.
to 050.
d. On top deck of Pulse Generator
d.
None.
O-1333/TPN-18, adjust GP
3------------------------------------------
As last indicated ------------
1 control R1128 and GP VER
1 control R1129 to position
cursor dot on 6-mi range mark
on artificial elevation sweep.
e. Repeat steps a thru d until
e.
Glidepath cursor adjusted
cursor dot is positioned on
for 3-deg glidepath with
1-mi range mark with ANGLE
theoretical touchdown
VOLTS control set at 020 and
at 1-mi.
positioned on 6-mi range mark
with ANGLE VOLTS switch
set at 050 without readjustment
of TD 1 control R1124 and
GLIDEPATH 1 control R1128.
f.
f.
Push in Pulse Generator
None.
O-1333/TPN-18 but do not
secure with two thumbscrews.
a. On Pulse Generator 0-1333/
a.
None.
TPN-18 under test, adjust
ANGLE VOLTS control to
position cursor dot on 2-mi
range mark on artificial eleva-
tion sweep.
b. Observe setting of ANGLE
b.
038 max, 023 min.
VOLTS control dial.
4-50
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