TB 9-6625-2083-24
Table 20. Storage Timing Accuracy Continued
Oscilloscope calibrator
Test instrument
MARKER mode
A AND B TIME/DIV
LED indication limits
AND DELAY TIME
output
switch setting
Min
Max
0.2 s
0.2 s
1.568 s
1.632 s
0.5 s
0.5 s
3.920 s
4.080 s
1 s
1 s
7.84 s
8.16 s
2 s
2 s
15.68 s
16.32 s
5 s
5 s
39.20 s
40.80 s
b. Adjustments
(1) Press CURSOR FUNCTION TIME pushbutton and set AC-GND-DC switch to GND.
(2) Adjust horizontal POSITION control to start trace at left vertical graticule line
and adjust INTENSITY control so that only time dots are visible.
(3) Adjust CURSOR/NO. OF SWEEPS control to position active time dot to 2d
vertical graticule line.
(4) Press PUSH CURSOR SELECT knob to activate 2d time dot and position it to
obtain LED readout of exactly 8.00 ms. Adjust R550 STORAGE HORIZONTAL GAIN
(fig. 10) for exactly 8 divisions between the two time dots (R).
43. Risetime
a. Performance Check
(1) Position controls as listed in (a) through (f) below:
NON STORE pushbutton pressed.
(a)
Set CH 1 and CH 2 VOLTS/DIV switches to 50 m.
(b)
VERT MODE CH 1 pushbutton pressed and CH 2 pushbutton released.
(c)
A AND B TIME/DIV AND DELAY TIME switch to .02 s.
(d)
X10 MAG pushbutton pressed.
(e)
AC-GND-DC switches to DC.
(f)
(2) Set oscilloscope calibrator for a CHAN 1, FAST EDGE mode output of 250 mV
and frequency to 10 kHz.
(3) Measure risetime, using standard risetime techniques. Risetime will be less than 3.5 ns.
(4) Set oscilloscope calibrator for a CHAN 2, FAST EDGE mode output of 250 mV
and frequency to 10 kHz. Press VERT MODE CH 2 pushbutton and release CH 1
pushbutton. Repeat technique of (3) above for CH 2.
b. Adjustments. No adjustments can be made.
44. Calibrator
a. Performance Check
(1) Position controls as listed in (a) and (b) below:
