TB 9-6625-2117-24
(4) Adjust MAGNIFIER REGISTRATION R868 (fig. 2) to align middle time marker
with center vertical graticule line (R).
11. High Speed Timing and Sweep Speed Accuracy
a. Performance Check
(1) Set TI TIME/DIV switch to .2 s.
(2) Set oscilloscope calibrator for a CHAN 1, MARKER mode output of .2 s/div.
(3) Adjust TI TRIGGER LEVEL control for a stable display.
POSITION control to align first time marker on first
(4) Adjust horizontal
vertical graticule line.
(5) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton to
align 1 marker per division on TI. If TI does not display 1 marker per division within
3 percent as indicated on oscilloscope calibrator err readout, perform b (1) below.
(6) Push and turn TIME/DIV MAG switch to .02 s.
(7) Change oscilloscope calibrator output to 20 nS/D.
POSITION control to align nearest time marker with first
(8) Adjust horizontal
vertical graticule line.
(9) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton to
align 1 marker per division on TI. If TI does not display 1 marker per division
within 3 percent as indicated on oscilloscope calibrator err readout, perform b (2) below.
(10) Repeat technique of (1) through (5) above for TI and oscilloscope calibrator
switch settings listed in table 6. TI will display 1 marker per division within 3 percent as
indicated on oscilloscope calibrator err readout.
Table 6. Sweep Calibration
Test instrument
Oscilloscope calibrator
TIME/DIV
MARKER
switch settings
outputs
s
s
0.5
0.5
s
s
1
1
s
s
2
2
s
s
5
5
s
s
10
10
s
s
20
20
s
s
50
50
0.1
ms
0.1
ms
0.2
ms
0.2
ms
0.5
ms
0.5
ms
1
ms
1
ms
2
ms
2
ms
5
ms
5
ms
ms
10
ms
20
ms
20
ms
50
ms
50
ms
10
