Tektronix 2236 User Manual

Operators
Familiarization -- 2236
Operators
PROBE COMPENSATION
O
Channel
1 and
Channel
2
CORRECT
( FLAT )
100
90
Misadjustment of probe compensation is one of the
source of measurement error . Most attenuator probes are
equipped with a compensation adjustment . To ensure opti
mum measurement accuracy , always compensate the oscil
loscope probes before making measurements . Probe
compensation is accomplished as follows :
OVER COM
PENSATED
( OVERSHOOT )
1. Preset
instrument
controls
and obtain a
baseline trace .
10
1
n
Hei
1 个
、
UNDER COM
PENSATED
( ROLLOFF )
2.
Connect the two
10X
probes
(
supplied with the
instru
ment ) to the CH 1 and CH 2 input connectors .
-
ji
( 4207-11 ) 4205-17
3. Set
both
VOLTS
/
DIV
switches to 10 m
and set
both
Input
Coupling
switches to AC
.
Fig . 3-2
.
Probe
compensation
.
4.
Select CH 2
VERTICAL
MODE and
insert the tip of
the
Channel 2
probe
into
the
PROBE
ADJUST
output
jack
.
1
Channel 1 AC RMSV
5. Using the approximately 1 - kHz PROBE ADJUST
square - wave signal as the input , obtain a 5 - division display
of
the
signal .
Best measurement accuracy above 1 kHz with a 10X
probe can be accomplished by adjusting the probe with the
aid of
a
precision
Ac
Calibration
System .
Probe
compensa
tion is accomplished as follows :
6. Set
the A
SEC
/
DIV switch to
display
several
cycles of
the
PROBE
ADJUST
signal . use
the
Channel 2
POSITION
control to
vertically
center
the
display .
The
equipment
listed
in
Table
3-2
, or
equivalent
equip
ment , is required to compensate the 10X probe for ac rms
volts
measurement .
Table 3-2
Equipment
Required for 10X
Probe Compensation
7.
Check the
waveform
presentation for
overshoot and
rolloff
(
see
Figure
3-2
) . If
necessary ,
adjust the
probe
com
pensation
for
flat tops on
the
waveforms
.
Refer to the
in
structions
supplied with the
probe for
details
of
compensation
adjustment .
Description
П
Minimum
Specification
AC Calibration
System
8.
Select CH 1
VERTICAL
MODE and
connect the
Chan
nel 1
probe tip to
the
PROBE
ADJUST
output
jack
.
Ac voltage : 400 mV to 4 V.
Voltage
accuracy : 0.01 % .
Frequency :
10
kHz .
Impedance : 50 2. Length : 42 inch .
Cable
9.
Use the
Channel 1
POSITION to
vertically
center
the
display
and
repeat step 7
for the
Channel
2 probe .
Connectors : BNC .
Adapter
Connectors : BNC -
male - to -
miniature
probe
tip
.
NOTE
П
Channel
1
ac
rms
volts
measurement
accuracy
above
1kHz
depends
directly upon the
precision
with
which
the preceding adjustment is performed . An overshoot
of 0.2
division ( or 4
% of
a 5 -
division
display ) will
add
approximately 4 % to
the
displayed
reading .
Compen
sation
related errors can be
reduced to 1 / 2 % or
less
by
carefully
adjusting the probe
compensation to the
PROBE
ADJUST
square -
wave
signal
.
1.
Preset
instrument
controls and
obtain
a
baseline
trace
,
set CH
1
VOLTS /
DIV switch to
50 mV ,
and
Channel 1
Input
Coupling switch
to AC RMSV
.
C
2.
Connect
the AC
Calibration
System
output
via
a
50-1
cable to CH
1 OR X
&
DMM
input connector .
REV
JUL
1984
3-5

Tektronix 2236 Specifications

General

Brand	Tektronix
Model	2236
Category	Test Equipment
Language	English