TM 11-5840-281-35/1
(3) On Pulse Generator O-1333/TPN-18
NOTES
front panel, set ANGLE VOLTS control to 131.
(4) On top deck of Pulse Generator 0-1333/
2: If synchronizing trigger source is switched
TPN-18, adjust applicable OFFSET control (R1121 or
from radar set to iff equipment or the reverse after
R1123) until azimuth cursor dot is superimposed on 1-
this adjustment, the SWEEP DELAY control must
mile range mark (1 mile from radar set group) on
be readjusted to compensate for different lengths of
azimuth display.
pretrigger cables.
2: Do not make any further adjustment of
NOTE
SWEEP DELAY control R2209. Do not push in
Pulse Generator O-1333/TPN-18 until alignments
have been completed.
It may be necessary to operate ANTENNA
switch to L or R to servo the elevation Antenna
AS-1291/TPN-8 to view the range marks.
3-45. Cursor Fill-In Alignment
(5) On Pulse Generator O-1333/TPN-18
front panel, set ANGLE VOLTS control to 146.
a. Test Equipment Required. Oscilloscope AN/
(6) On top deck of Pulse Generator 0-1333/
USM-140B (oscilloscope).
TPN-18, adjust applicable COURSE LINE control
b. Equipment Conditions and Connections.
(R1126 or R1127) and CL VER control (R1143 or
(1) Radar set AN/TPN-18 turned on.
R1144) until azimuth cursor dot is superimposed on 5-
(2) On master Pulse Generator 0-1333/
mile range mark. Use CL VER control as vernier control
TPN-18, place SCAN MODE switch to NORM, SCAN
for small adjustments.
switch OFF, RANGE MILES switch placed to 5 or 10,
(7) Repeat (3) through (6) above until
ANGLE VOLTS switch placed to AZ, EL CURSOR
azimuth cursor dot is superimposed on 1- and 5-mile
switch placed to GP. On Control-Indicator C-6988/TPN-
range marks at stated ANGLE VOLTS control settings.
18, place TRANS- MITTER switch to OFF.
(8) On Pulse Generator O-1333/TPN-18
(3) At front of applicable Control-Indicator
front panel, place ANGLE VOLTS switch to EL.
C-6988/TPN-18, Pulse Generator 0-1333/ TPN-18 pulled
(9) Set ANGLE VOLTS control to 104.
out for access to top deck.
(10) On top deck of Pulse Generator O-
(4) Oscilloscope connected as shown in
1333/TPN-18, adjust applicable TD control (R1124 or
R1123) until elevation cursor dot is superimposed on 1-
c. Procedure.
mile range mark (1 mile from radar set group) on
elevation display.
NOTE
(11) On Pulse Generator O-1333/TPN-18
front panel, set ANGLE VOLTS control to 117.
Accomplishment of the cursor fill-in alignment in
(12) On top deck of Pulse Generator O-
(1) through (28) below will necessitate
1333/TPN-18, adjust applicable GP control (R1128 or
realignment of the azimuth and elevation
R1131) and GP VER control (R1129 or R1130) until
cursors.
elevation cursor dot is superimposed on 5-mile range
mark. Use GP VER control as vernier control for small
(1) When CURSOR SELECT switch S1104
adjustments.
is placed to 1, adjust PREC DELAY 1 control R1120 on
(13) Repeat (9) through (12) above until
top deck of Pulse Generator 0-1333/ TPN-18 until
elevation cursor dot is superimposed on 1- and 5-mile
touchdown range mark is just visible at start of azimuth
range marks at stated ANGLE VOLTS control settings.
sweep. When CURSOR SELECT switch S1104 is
(14) On Pulse Generator O-1333/TPN-18
placed to 2, adjust PREC DELAY 2 control R1119 until
front panel, place RANGE MILES switch to 20 and
touchdown range mark is just visible at start of azimuth
ANGLE VOLTS switch to EL.
sweep.
(15) Adjust ANGLE VOLTS control to
(2) When CURSOR SELECT switch S1104
position elevation cursor dot at a point between 15- and
is placed to 1, place RUNWAY 1 switch S1109 to R.
20-mile range on elevation display.
When CURSOR SELECT switch S1104 is placed to 2,
place RUNWAY 2 switch S1110 to R.
3-53
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