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Performance Check Procedure—2246 IV and 2246 Mod A Service
TRIGGERING
Equipment Required (See Table 4-1)
Leveled sine-wave generator
Function generator
50 O BNC coaxial cable
10X BNC attenuator
2X BNC attenuator
50 O BNC termination
Dual-input coupler
TV signal generator
1. 500 Hz Trigger Sensitivity
NOTE
Set:
READOUT (Intensity)
For a viewable
A INTEN
readout
For a viewable
Vertical MODE
trace
CH 1
CH 1 and CH 2 Input
COUPLING
DC
CH 1 VOLTS/DIV
0.1 V
SCOPE BW
On
Horizontal MODE
A
A SEC/DIV
2 ms
A/B SELECT
A Trigger
Trigger MODE
AUTO LEVEL
Trigger SOURCE
VERT
Trigger CPLG
AC
Trigger SLOPE
_ r (positive)
Trigger HOLDOFF
Min
FOCUS
For best
Measurements
defined display
All off (press
Horizontal POSITION
CLEAR
DISPLAY three
times)
12 o ’clock
The Trigger LEVEL control may be used
to obtain a stable display.
e.
CHECK—that the display is stably triggered with
DC, HF REJ, and AC Trigger CPLG; and that the
display will not trigger on NOISE REJ or LF REJ
Trigger CPLG.
f.
Set:
Trigger CPLG
A/B SELECT
Trigger MODE
Trigger SOURCE
Trigger SLOPE
Horizontal MODE
B SEC/DIV
DELAY Time
B INTEN
DC
B Trigger
NORM
VERT
_v~ (positive)
B
0.5 ms
70.000
(minimum
delay time)
For viewable
display
NOTE
b. Connect function generator (FG 502) output to
the CH 1 input via a 5 0 - 0 BNC coaxial cable,
and a 5 0 - 0 BNC termination.
c. Set function generator (FG 502) output to pro
duce a 7.0 division sine-wave display at 500 Hz.
d. Add a 10X and a 2X BNC attenuator before the
5 0 - 0 BNC termination (for a 0.35 division
display).
It may be necessary to adjust the Trigger
LEVEL control to obtain a display.
g.
CHECK—that using the Trigger LEVEL control the
display can be stably triggered in DC, HF REJ,
and AC Trigger CPLG; and that the display can
not be triggered in NOISE REJ or LF REJ Trigger
CPLG.
h. Disconnect the test setup from the CH 1 input.
4-14
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 ...
Страница 91: ...Theory of Operation 2246 1Y and 2246 Mod A Service 6081 12 6557 99 3 54 Figure 3 9 Power Supply block diagram ...
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Страница 278: ...Figure 9 5b Detailed 2246 1Y or 2246 Mod A block diagram part 2 R E ...
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Страница 304: ...A D D J U N 1991 ...
Страница 311: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 1 0 V r l III B f e I l i 6555 39 ...
Страница 314: ...15 14 13 12 11 10 9 8 7 6 5 12 11 10 9 8 7 AT117 A TI 271 1 2 3 4 5 6 6555 70 Figure 9 8 Hybrid pin identifiers ...
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Страница 321: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 2 SET READOUT CONTROL CCW OFF 6555 40 ...
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Страница 326: ...A B C P E F G ...
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Страница 343: ...C l rti ...
Страница 344: ...WAVEFORMS FOR DIAGRAM 5 2246 1Y and 2246 Mod A Service HORIZ MODE A A SEC DIV 2M S HOLDOFF MIN CCW ...
Страница 345: ...HORIZ MODE ALT A SEC DIV 2M s B SEC DIV 5 mS HOLDOFF MIN DELAY INTENSIFIED ZONE STARTS MIDSCREEN ...
Страница 347: ...BEV JUNE 1991 7062 18 ...
Страница 349: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 6 6555 43 I ...
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 372: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 9 MORE ...
Страница 373: ... 6555 72 6557 88 ...
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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 ...
Страница 380: ...WAVEFORMS FOR DIAGRAM 10 ...
Страница 387: ...WAVEFORMS FOR DIAGRAM 11 6555 73 6557 48 ...
Страница 394: ...WAVEFORMS FOR DIAGRAM 12 2246 1Y and 2246 Mod A Service i f I S 1 f c i 4 i ...
Страница 395: ...WAVEFORMS FOR DIAGRAM 12 cont 2246 1Y and 2246 Mod A Service ...
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Страница 400: ...REV JUNE 1991 7062 39 ...
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Страница 406: ...B 2246 IV AND 2246 MOD A ...
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Страница 415: ...2246 1Y 2246 MOD A ...
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Страница 423: ...2246 1Y 2246 MOD A ...
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