TM 11-5840-281-35/1
(g) SWEEP TIME VERNIER: As
sawtooth will be displayed on oscilloscope.
Place
required.
SWEEP TIME to 5 MICROSECONDS/CM and channel B
(h) Vertical Presentation: CHANNEL
SENSITIVITY to .5 VOLTS/CM.
A.
(12) On top deck of Pulse Generator O-
(i) CHANNAL A AC-DC: AC.
1333/TPN-18, rotate TD 1 control R1124 or TD 2 control
(j)
CHANNEL
A
SENSITIVITY
R1125 (control selected depends upon position of
(VOLTS/'CM) :.05 (k) CHANNEL A SENSITIVITY
CURSOR SELECT switch) fully ccw until minimum
VERNIER: CALIBRATED.
amplitude is observed.
(2) On cursor generator (located in Pulse
(13) On sawtooth generator, adjust OFFSF'
Generator 0-1333/TPN-18), place FILL-IN switch S2901
CAL control R2638 slowly cw until cursor sawtooth
to OFF.
waveform on oscilloscope abruptly lengthens, then ccw
(3) On sawtooth generator, rotate OFFSET
/8 turn.
CAL control R2638 fully ccw.
(4) On Pulse Generator O-1333/TPN-18,
NOTE
set ANGLE VOLTS control to 20.
(5) On sawtooth generator, adjust REF
Do not make any further adjustments of REF
SAW SLOPE control R2609 and REF SAW LIN control
SAW SLOPE R2609, REF SAW LIN R2606,
R2606 to obtain linear sawtooth waveform on
CURSOR SAW SLOPE R2622, CURSOR SAW
oscilloscope that is between 1.0 and 1.3 volts peak
LIN R2619, and OFFSET CAL R2638 controls
amplitude (between 2 and 2.6 cm on oscilloscope). On
on sawtooth generator.
oscilloscope, adjust SWEEP TIME VERNIER control as
required to observe full sawtooth on oscilloscope
(14) On Receiver-Transmitter RT-818/
presentation.
TPN-18, place HV switch to OPERATE.
(6) On oscilloscope, place vertical
(15) On master Control-Indicator C-6988/
presentation switch to ALERNATE, CHANNEL B AC- DC
TPN-18, place TRANSMITTER switch through
switch to AC, CHANNEL B SENSITIVITY switch to same
NARROW to HV ON and place RANGE MILES switch to
position as CHANNEL A SENSITIVITY switch, and
5.
CHANNEL B SENSITIVITY VERNIER control to
(16) Disconnect oscilloscope CHANNEL A
CALIBRATED.
INPUT and CHANNEL B INPUT leads from sawtooth
(7) On oscilloscope, adjust CHANNEL B
generator.
VERTICAL POSITION to superimpose oscilloscppe
(17) Connect oscilloscope as shown in
baselines of both channels.
(8) On sawtooth generator, adjust
(18) On oscilloscope, place INTERNAL
CURSOR SAW SLOPE control R2622 and CURSOR
SWEEP MAGNIFIER switch to X2.
SAW LIN control R2619 control to match two sawtooth
(19) On oscilloscope, adjust CHANNEL B
waveforms in linearity and amplitude (superimpose
VERTICAL POSITION control to position channel B
cursor sawtooth on reference sawtooth).
Rotate
timebase on second horizontal gridline from top.
ALTITUDE control on Pulse Generator O-1333/TPN-18
(20) On oscilloscope, adjust CHANNEL A
front panel cw as required to prevent cursor solution and
VERTICAL POSITION control to position channel A
to maintain same time duration on both sawtooth
timebase on second horizontal gridline from bottom.
waveforms.
(21) On oscilloscope, adjust CHANNEL A
(9) On Pulse Generator O-1333/TPN-18
SENSITIVITY control to obtain amplitude of intensity
front panel, place EL CURSOR switch to GP, ANGLE
gate suitable for comparing leading edge of intensity gate
VOLTS switch to EL, and ANGLE VOLTS control fully
to leading edge of first video (transmitter pulse).
ccw.
(22) On trigger delay generator, adjust
(10) On top deck of Pulse Generator 0-
SWEEP DELAY control R2209 to position leading edge
of intensity gate (displayed on channel A) 0.5 sec
1333/TPN-18, rotate GP I control R1128 and GP 1 VER
control R1129 or GP 2 control R1131 and GP 2 VER
ahead of transmitter pulse (displayed on channel B).
control R1130 fully cw (control selected depends upon
position of CURSOR SELECT switch).
(11) On oscilloscope, place vertical
presentation switch to CHANNEL B, so that only cursor
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