Performance Check Procedure —2246 1Y and 2246 Mod A Service
f.
Set:
CH 1 VAR VOLTS/DIV
Detent
(calibrated)
Vertical MODE
CH 2 (CH 1 off)
CH 2 VOLTS/DIV
10 mV
g. Position CH 2 trace to the center horizontal graticule
line.
h. Move the test signal to the CH 2 input.
f.
Move the test signal to the CH 1 input.
g. Set:
Vertical MODE
CH 1 (CH 2 off)
CH 1 VOLTS/DIV
2 mV
h. Position the trace two graticule lines below the cen
ter graticule line.
i. Repeat CHECK procedure for CH 1.
i.
Set CH 2 VAR VOLTS/DIV
fully CCW.
j.
Repeat the CHECK procedure for CH 2.
k. Set CH 2 VAR VOLTS/DIV to detent (calibrated) posi
tion.
8. Low-Frequency Linearity
a. Set:
Vertical MODE
CH 1 (CH 2 off)
CH 1 VOLTS/DIV
10 mV
SCOPE BW
On
b. Set calibration generator AMPLITUDE to 20 mV.
c. Move the test signal to the CH 1 input.
d. Position the top of the signal to top graticule line.
e. Check the signal amplitude is between 1.9 and 2.1
divisions.
f.
Set bottom of the signal to bottom graticule line.
g. Check the signal amplitude is between 1.9 and 2.1
divisions.
h.
Repeat the procedure for CH 2.
9. CH 1 and CH 2 Vertical Deflection Accuracy
a. Set CH 2 VOLTS/DIV to 2 mV.
b. Set calibration generator AMPLITUDE to 10 mV.
c.
Position the trace two graticule lines below the cen
ter graticule line.
d. CHECK—all positions of the VOLTS/DIV settings for
correct signal-to-graticule accuracy, using the set
tings in Table 4-2 for the checks.
e. Set calibration generator to Std Ampl output, 10 mV.
Table 4 -2
S ignal-to-G raticule Accuracy
VOLTS/DIV
Setting
Calibration
Generator
AMPLITUDE Setting
Deflection
Accuracy
(in divisions)
2 mV
10 mV
4.90 to 5.10
5 mV
20 mV
3.92 to 4.08
10 mV
50 mV
4.90 to 5.10
20 mV
100 mV
4.90 to 5.10
50 mV
200 mV
3.92 to 4.08
0.1 V
500 mV
4.90 to 5.10
0.2 V
1 V
4.90 to 5.10
0.5 V
2 V
3.92 to 4.08
1 V
5 V
4.90 to 5.10
2 V
10 V
4.90 to 5.10
5 V
20 V
3.92 to 4.08
10. CH 3 and CH 4 Vertical Deflection Accuracy
a. Set:
Vertical MODE
CH 3 (CH 1 off)
CH 3 & CH 4 VOLTS/DIV
0.1 V
b. Position the trace two graticule lines below the cen
ter horizontal graticule line.
c. Move CH 1 test setup to the CH 3 input.
d. Set calibration generator AMPLITUDE to 0.5 V.
e. C H EC K-the signal amplitude is between 4.90 and
5.10 divisions.
4 -8
REV JUN 1991
Содержание 2246 1Y
Страница 13: ...2246A Service 7062 01 X The 2246 1Y or 2246 Mod A Portable Oscilloscope ...
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Страница 69: ...Theory of Operation 2246 1Y and 2246 Mod A Service 15 V 6081 07 3 32 Figure 3 4 Simplified Sweep Circuit ...
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Страница 345: ...HORIZ MODE ALT A SEC DIV 2M s B SEC DIV 5 mS HOLDOFF MIN DELAY INTENSIFIED ZONE STARTS MIDSCREEN ...
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Страница 354: ...A L B i C 1 D 1 E i F i G 1 2 3 4 5 6 7 8 2246 1Y AND 2246 MOD A _________A fc A A REV JUNE 1991 7062 19 ...
Страница 355: ...I BOARD LOCATION 8K 8J 8H 7H 8H 8H 7J 8D 7H 8H 8J 8J 7K 8K 10D 6L 6K 6L 6K 6G 5H I ...
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Страница 376: ...SCHEM LOCATION BOARD LOCATION 2E 2B 7F 4B 4J 5D 3J 5C 4L 6D 3L 6C 5L 7D 3L 7D 3M 7D 5M 7D IB 1A 1C 1A 2B 1A 3B 1A ...
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