Tektronix 2221 - Page 145

Appendix A - 2221 Operators
p . Align the 2nd time marker with the 2nd vertical grati
cule line using the Horizontal POSITION control .
e . Select 50 us time markers from the time - mark
generator
C
NOTE
f . Align the 3rd time marker with the center vertical
graticule line
using the
Horizontal
POSITION control .
Allow the points to accumulate for a few seconds
before
saving the
display .
g . Set the X10 Magnifier knob to On ( knob out ) .
4.
Repeat
parts h through
k .
NOTE
h . CHECK - Magnified time marker can be positioned
to the left of
the center
vertical
graticule
line by
rotating
the Horizontal POSITION control fully counterclockwise .
Pulses with fast rise and fall times have only a few
sample points , and it may not be possible to place
the cursors at exactly the same voltage levels .
i .
CHECK -
Start
of the
sweep can be
positioned to
the right of the center vertical graticule line by rotating the
Horizontal POSITION control fully clockwise .
r . CHECK - The AT readout is between 397.0 ns and
403.0
ns .
5.
Check
Store
Expansion
Range
3.
Check
SEC / DIV
Variable
Range
a .
Set
:
a .
Set
:
0.1
us
SEC
/
DIV
X10
Magnifier
Off (
knob
in )
SEC / DIV
SEC / DIV Variable
X10
Magnifier
0.2
ms
Fully
counterclockwise
Off
(
knob
in )
П
П
П 1
П
Л
П
П
П
П
in
П
Л
Л
1
п
Л
П
п
Л
b . Select 10
us time
markers from the
time - mark
generator
.
b . Select 0.5 ms time markers from the time - mark
generator
.
C. Use the Horizontal POSITION control to align the
start of the Sweep with the 1st vertical graticule line .
C. CHECK - Time markers are one division or less
apart .
d . Set the STORE / NON - STORE switch to STORE
( button in
) .
4.
Check
Position
Range
e . Set the X10 Magnifier knob to On ( knob out ) .
a .
Set :
10
uS
SEC / DIV
SEC / DIV
Variable
f . CHECK_The time markers are one division apart .
CAL
detent
b . Select 10 us time markers from the time - mark
generator
.
6.
Check 4K to 1K
Display
Compress
a .
Set
:
5
us
C.
CHECK - Start of
the
sweep can be
positioned
to
the right of
the center
vertical
graticule line by
rotating the
Horizontal POSITION control fully clockwise .
SEC / DIV
X10
Magnifier
STORE / NON - STORE
Off (
knob
in )
STORE
(
button in
)
d .
CHECK_The
11th time
marker
can be
positioned to
the left of
the center
vertical graticule line by
rotating
the
Horizontal POSITION control fully counterclockwise .
b . Select 10 us time markers from the time - mark gen
erator and check that the time markers are two divisions
apart .
A - 13