(16) On cursor generator, place FILL-IN
starting range for cursor fill-in without excessive widening
switch S2901 to ON.
of cursor as viewed on Control-Indicator C-6988/TPN-18
display. If excessive widening of cursor exists at starting
IN-CO-IN control R2723 fully cw.
time of fill-in cursor, a slight readjustment of FILL-IN
SAW SLOPE control R2626 can be made in conjunction
positions indicated in (a) through (1) below.
with adjustment of FILL-IN CO-IN control R2723.
(a) POWER: ON.
(b) SWEEP MODE: PRESET.
(c) TRIGGER SOURCE: EXT AC.
(d) HORIZONTAL DISPLAY: X2.
Do not make any further adjustments of FILL-IN
(e) EXTERNAL VERNIER: CAL.
SAW SLOPE control R2626, FILL-IN SAW LIN
(f) SWEEP TIME MILLISECONDS/
control R2632, and FILL-IN CO-IN control
CM:.2 (g) SWEEP TIME VERNIER: As required.
(i) CHANNEL A AC-DC: AC.
front panel, place SCAN MODE switch to 350 EL.
(j) CHANNEL A POLARITY: +UP.
(25) On top deck of Pulse Generator O-
(k) CHANNEL B AC-DC:AC.
1333/TPN-18, adjust 35 EL FILL-IN control RllO10 for
(l) CHANNEL B POLARITY: +UP.
amount of cursor fill-in required for optimum cursor
presentation on Control-Indicator C-6988/TPN-18
POSITION, CHANNEL A VERTICAL POSITION, and
CHANNEL B VERTICAL POSITION controls to position
(26) On Pulse Generator 0-1333/TPN-18
cursor sawtooth and fill-in sawtooth waveforms as shown
front panel, place EL CURSOR switch to HF.
Observe that elevation cursor fill-in height finder cursor is
not excessive. If required, make minor adjustment of fill-
(20) Adjust CHANNEL A SENSITIVTY
in with 35 EL FILL-IN control R11b0.
control and CHANNEL B SENSITIVITY control as
(27) On Pulse Generator 0-1333/TPN-18
required to obtain waveforms of approximately equal
front panel, place SCAN MODE switch to 60 AZ.
(28) On top deck of Pulse Generator O-
1333/TPN-18, adjust 60 AZ FILL-IN control R1113 for
SAW SLOPE control R2626 and FILL-IN SAW LIN
amount of cursor fill-in required for optimum azimuth and
control R2632 for linear fill-in sawtooth wave- form with a
elevation cursor presentation on Control-Indicator C-
slope that matches slope of cursor sawtooth waveform.
front panel, place ANGLE VOLTS switch to OPERATE
and SCAN switch to ON.
until azimuth and elevation cursors have been
IN CO-IN control R2723 for minimum possible
3-46. Cursor Alignments
Refer to TM 11-840-281-12, paragraph 231 for alignment
procedures for the azimuth, elevation, and height finder
Section IV. REPAIR PROCEDURES
that can be performed by direct support maintenance
personnel is limited by the tools, test equipment, and
This section contains information pertinent to direct
replacement parts available and by the skill of the
The amount of repair