Tektronix 2236 - OPERATORS ADJUSTMENTS; Introduction to Adjustments; Baseline Trace Setup; Trace Rotation Adjustment

1
Operators Familiarization - 2236 Operators
OPERATOR'S ADJUSTMENTS
INTRODUCTION
B TRIGGER
C
SLOPE
LEVEL
OUT :
Fully
clockwise
To verify the operation and accuracy of your instrument
before making measurements , perform the following
adjustment procedures . If adjustments are required beyond
the scope of the operators's adjustments , refer the
instrument to a qualified service technician .
A TRIGGER
C
บ
Before proceeding with these instructions , refer to
“ Preparation for Use " ( Section 2 ) .
VAR HOLDOFF
Mode
SLOPE
LEVEL
A & B INT
A SOURCE
A EXT COUPLING
NORM
P - P AUTO
OUT :
2
Midrange
VERT MODE
INT
AC
1
Verify that the POWER switch is OFF ( push button out ) ,
then plug the power cord into the power - source outlet .
CTM
U
Midrange
All buttons out
If indications specified in these procedures cannot be
obtained , refer the instrument to a qualified service
technician
A TIME POSITION
Function Select
UPPER FUNCTIONS
LOWER FUNCTIONS
OUT
BASELINE TRACE
2. Press in the POWER switch button ( ON ) and allow the
instrument
to warm up
( 20
minutes is
recommended for
maximum
accuracy ) .
ܐ
First obtain a baseline trace , using the following
procedure .
wy 3. Adjust the
A INTENSITY
control for desired
display
brightness .
1. Preset the instrument front - panel controls as follows :
Display
4. Adjust
the
Vertical and
Horizontal
POSITION
controls
as needed to center the trace on the screen .
A and B INTENSITY
FOCUS
Fully
counterclockwise
Midrange
C
C
Vertical ( Both Channels )
TRACE
ROTATION
POSITION
VERTICAL MODE
BW LIMIT
VOLTS /
DIV
VOLTS / DIV
Variable
INVERT
Input Coupling
Midrange
CH 1
Off (
button
out )
50
m
CAL
detent
Off (
button
out )
AC
Normally
, the
resulting
trace will be
parallel
to the
center
horizontal graticule line , and the Trace Rotation adjustment
should not be required . If adjustment is needed , perform the
following
procedure
:
C
C
C
1. Preset instrument controls and obtain a baseline trace .
Horizontal
2. Use the Channel 1 POSITION control to move the
baseline trace to
the center
horizontal
graticule
line
.
A / B SWP SEP
Off
midrange
POSITION
Midrange
HORIZONTAL MODE А
A and B SEC / DIV
0.5
ms
SEC / DIV
Variable
CAL
detent
X10
Magnifier
Off (
knob in )
B DELAY TIME POSITION Fully counterclockwise
C
3. If the
resulting trace
is not
parallel to the
center hori
zontal graticule line , use
small flat
- bit screwdriver
to
adjust
the TRACE ROTATION control and align the trace with the
center horizontal graticule line .
L
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