TB 9-4931-501-24
(d) REP RATE switch to 1 MHz.
(1) Pull TI POWER switch to on. If a vertical trace is not displayed within 0.5
division of TI center vertical graticule line, perform b below.
b. Adjustments. Adjust R222 HORIZ CENTER (fig. 3) to position trace to TI center
vertical graticule line.
18. Horizontal Gain
a. Performance Check
(1) Set calibration fixture TEST switch to VERT OR HORIZ GAIN and adjust
POSITION control to align bright center trace on TI with center vertical graticule line.
(2) If center seven traces do not coincide within 0.25 division of respective vertical
graticule lines, perform b below.
b. Adjustments. Adjust R212 GAIN (fig. 3) for a 6 division deflection over center
seven vertical graticule lines (R).
19. 10 and 5 ns Timing
a. Performance Check
(1) Press TI POWER switch to off.
Install calibration fixture in TI left
compartment and time base in right compartment. Pull TI POWER switch to on.
(2) Set calibration fixture TEST switch to AUX IN.
(3) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 output to
calibration fixture AUX IN, and oscilloscope calibrator EXT TRIG CHAN 5 output to time
base EXT TRIG.
(4) Set oscilloscope calibrator marker output to 10 ns and trigger output to /10.
Adjust calibration fixture AMPLITUDE control for convenient display on TI screen.
(5) Position time base controls as listed in (a) through (f) below:
AUTO TRIG switch in.
(a)
MAIN SEC/DIV switch to 0.1 s.
(b)
SWP MAG switch in.
(c)
TRIG SOURCE LEFT and EXT switches in.
(d)
MAIN TRIG LEVEL control for a stable display on TI screen.
(e)
POSITION control to align 4th time marker with 2d vertical graticule line on TI.
(f)
(6) If the 12th time marker is not within 2.5 minor divisions of 10th vertical
graticule line, perform b (1) below.
(7) Set oscilloscope calibrator marker output to 5 ns and adjust calibration fixture
AMPLITUDE control for convenient display on TI.
(8) Adjust TI MAIN TRIG LEVEL control for a stable display and time base
POSITION control to align 7th time marker with 2d vertical graticule line on TI screen.