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Channels 1 and 2 Cursor Accuracy
Vertical Gain Accuracy

Calibration Procedure For Oscilloscope Os-291/G Page Navigation
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TB 9-6625-2251-24
e. Select CURSOR SELECT and rotate CURSOR DELAY knob to align next
segmented cursor 3 divisions above crt horizontal centerline. Display will indicate within
Min/Max indications shown in table 3.
f. Repeat technique of b through e above using settings and indications listed in table 3.
Table 3. Channel 1 Cursor Volts Accuracy
Range
Indications
VOLTS/DIV
settings
Min
Max
2  mV
11.88
mV
12.12
mV
5  mV
29.7
mV
30.3
mV
10  mV
59.4
mV
60.6
mV
20  mV
118.8
mV
121.2
mV
50  mV
297
mV
303
mV
100  mV
594
mV
606
mV
200  mV
1.188  V
1.212  V
500  mV
2.970  V
3.030  V
1V
5.94
V
6.06
V
2V
11.88
V
12.12
V
5V
29.7
V
30.3
V
g. Select VERTICAL MODE, set CH 2 to on, and set CH1 to off.
h. Repeat technique of b through e above for CH 2, using settings and indications in
table 4 below.
Table 4. Channel 2 Cursor Volts Accuracy
Range
Indications
VOLTS/DIV
settings
Min
Max
2
mV
11.88
mV
12.12
mV
5
mV
29.7
mV
30.3
mV
10
mV
59.4
mV
60.6
mV
20
mV
118.8
mV
121.2
mV
50
mV
297
mV
303
mV
100
mV
594
mV
606
mV
200
mV
1.188
V
1.212
V
500
mV
2.970
V
3.030
V
1
V
5.94
V
6.06
V
2
V
11.88
V
12.12
V
5
V
29.7
V
30.3
V
i. Select CURSOR FUNCTION and set Time to on. Adjust TI HORIZONTAL A
AND B SEC/DIV controls for 500 s indication on crt.
j.  Rotate CURSOR/DELAY knob and align segmented movable cursor 3 divisions to
left of center vertical line on crt.
k. Press CURSOR SELECT pushbutton and turn CURSOR/DELAY knob to align
next segmented moveable cursor 3 divisions to right of center vertical line on crt. Display
will indicate within Min/Max indications shown in table 5.
5


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