Tektronix 2221 - Page 138

Appendix A - 2221 Operators
U
d . CHECK - The bottom and top of the trace may be
positioned above and below the center horizontal graticule
line by rotating the Channel 2 POSITION control fully
clockwise and
counterclockwise
respectively .
k . Position the trace 0.5 division above the bottom hor
izontal
graticule
line
using the
Channel
2
POSITION
control ,
1. CHECK - Trace shift of 0.5 division or less .
e . Move the cable from the CH 2 OR Y input connector
to the CH 1 OR X input connector . Set the VERTICAL
MODE switch to CH 1 .
m . Set the
VERTICAL MODE
switch to
CH 1 .
u
f . Repeat
parts
c
and d
using the
Channel 1
controls .
n .
Repeat
steps g
through
I for
Channel
1
trace .
u
g . Disconnect the test equipment from the instrument .
6. Check Non
Store
Aberrations
ui
5. Check Acquisition Position Registration
a .
Set
:
a .
Set :
10 mV
GND
VOLTS /
DIV (
both )
AC -
GND
-
DC
(
both )
SEC / DIV
SAVE / CONT
BW
LIMIT
VOLTS
/
DIV (
both )
AC
-
GND
-
DC
(
both
)
SEC / DIV
STORE / NON - STORE
Off
(
button
out
)
2 mV
DC
0.05
us
NON
-
STORE
(
button out )
10
us
CONT
b . Position the trace exactly on the center horizontal
graticule line
using the
Channel 1
POSITION
control ,
b . Connect the fast - rise , positive - going square - wave
output via
a 50 2 cable
, a 10X
attenuator
, and a 50
12 ter
mination to the CH 1 OR X input connector .
u
C. Set STORE / NON - STORE switch to STORE ( button
in ) .
باب
C. Set
the
generator
to
produce
a 1
MHz , 5 -
division
display .
d . CHECK Trace remains within 0.5 division of the
center graticule line .
u
d .
CHECK
-
Display aberrations are
within 4 %
( 0.2
division
or less
) for the
following
VOLTS / DIV switch set
tings : 5 mV through 50 mv . Adjust the generator output
and attach or remove the 10X attenuator as necessary to
maintain
a 5 - division
display at
each VOLTS /
DIV switch
setting .
e .
Set
:
VERTICAL MODE
STORE / NON - STORE
CH 2
NON - STORE
u
f . Repeat
parts b
through d for
Channel
2 trace .
e . CHECK - Display aberrations are within 6 % ( 0.25
division or less
) for the
following VOLTS / DIV
switch set
tings : 0.1 V through 0.5 V. Adjust the generator output
and attach or remove the 10X attenuator as necessary to
maintain a 5 - division display at each VOLTS / DIV switch
setting
.
g . Position the trace 0.5 division below the top horizon
tal graticule
line using
the Channel
2 POSITION
control .
n . Set SAVE / CONT switch to SAVE .
f . Disconnect the cable from the CH 1 OR X input con
nector . Reconnect the 10x attenuator ( if previously
removed ) and reduce the generator amplitude to minimum .
U
i . CHECK - Trace shift of 0.5 division or less .
g . Connect the cable to the CH 2 OR Y input connec
tor and set the
VERTICAL MODE
switch to CH
2 .
j . Set SAVE / CONT switch to CONT .
A - 6