Tektronix 2221 - Page 149

Appendix A - 2221 Operators
1
П
П
4.
Check
External
Trigger
Ranges
a .
Set
:
5. Check Single Sweep Operation
a . Adjust the
TRIGGER LEVEL
control to
obtain a
stable
display
.
C
0.5 V
20
us
CH 1 VOLTS / DIV
SEC /
DIV
X10
Magnifier
TRIGGER SLOPE
TRIGGER
Mode
b .
Set :
Off (
knob
in )
OUT
NORM
Channel 1 AC - GND - DC
SOURCE
GND
INT
行
b . Set the generator to produce a 50 kHz , 6.4 - division
display .
C. Press in the SGL SWP button . The READY LED
should
illuminate
and
remain on .
d . Set the Channel 1 AC - GND - DC switch to DC .
C.
CHECK -
Display is
triggered
along the
the
entire
positive slope of the waveform as the TRIGGER LEVEL
control is
rotated .
NOTE
The
INTENSITY control
may require
adjustment to
observe
the
single -
sweep
trace .
d . CHECK - Display is not triggered ( no trace ) at either
extreme of rotation .
П
Л
Л
e .
CHECK -
READY
LED
goes
out
and a
single
sweep
Occurs .
e . Set the TRIGGER SLOPE button to IN .
f . Press in the SGL SWP button several times .
f .
CHECK
-
Display
is
triggered along the
entire
nega
tive slope of the waveform as the TRIGGER LEVEL con
trol is rotated .
9. CHECK - Single - sweep trace
occurs ,
and the
READY LED illuminates briefly every time the SGL SWP
button is pressed in and released .
g . CHECK - Display is not triggered ( no trace ) at either
extreme of rotation .
h . Disconnect the test equipment from the instrument .
П
Л
П
П
7
Л
Л
1 П
П
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