TB 9-4931-503-24
Table 9. Sweep Timing (Mag) - Continued
Oscilloscope calibrator
Test instrument
err display
SECONDS/DIV
MARKER output
indications
switch settings
settings
( %)
s
S/D
4
10
10
s
S/D
4
20
20
s
S/D
4
50
50
0.1
ms
0.1
mS/D
4
0.2
ms
0.2
mS/D
4
0.5
ms
0.5
mS/D
4
1
ms
1
mS/D
4
2
ms
2
mS/D
4
5
ms
5
mS/D
4
10
ms
10
mS/D
4
20
ms
20
mS/D
4
50
ms
50
mS/D
4
0.1
s
0.1
S/D
4
0.2
s
0.2
S/D
5
0.5
s
0.5
S/D
5
b. Adjustments
(1) Release TI SWP MAG pushbutton (out), set SECONDS/DIV switch to 1 m and
oscilloscope calibrator MARKER output for 1 mS/D. If necessary, adjust oscilloscope
calibrator EDIT FIELD knob for a 0.0% err display indication.
(2) Adjust TI POSITION control to align 1st time marker with 1st vertical graticule
line (extreme left). Adjust R345 LF TIME (fig. 3) to align one time marker per division (R).
(3) Press TI SWP MAG pushbutton and adjust TI POSITION control to align 1st
time marker with 1st vertical graticule line (extreme left). Adjust R350 MAG GAIN (fig. 3)
to align one time marker per division (R).
and
(4) Release TI SWP MAG pushbutton (out), set SECONDS/DIV switch to .5
set oscilloscope calibrator MARKER output for 0.5 S/D.
(5) Adjust TI POSITION control to align 1st time marker with 1st vertical
graticule line (extreme left). Adjust C286 HF TIME (fig. 3) to align one time marker per
division (R).
16. Final Procedure
a. Deenergize and disconnect all equipment. Replace protective covers and cabinet panels.
b. Annotate and affix DA label/form in accordance with TB 750-25.
