Tektronix 2236 User Manual

Operating Procedures - 2236 Operators
4. Set the A TRIGGER SLOPE switch to OUT : / to
measure positive half cycles of the input signal , and to
IN : 2 for
measurement
of
negative half cycles
.
4. Set the A SEC / DIV switch to display the measurement
points of
interest
on the
waveform
.
5. Adjust the A TRIGGER LEVEL control to trigger on the
approximate
mid
-
point
on
the waveform
.
5. Select ALT HORIZONTAL MODE and adjust both the
appropriate vertical
channel
POSITION control
and A / B
SWP SEP control to display the A trace above the B trace .
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6. Set UPPER FUNCTIONS - LOWER FUNCTIONS switch
to IN and press
in the
WIDTH button
.
6. Set UPPER FUNCTIONS - LOWER FUNCTIONS
switch to OUT and press in the A TIME button .
7. Read the waveform width on the readout .
7. Set the B SEC / DIV switch to the fastest sweep that
provides a usable ( visible ) intensified zone .
8. Adjust the B DELAY TIME POSITION control to move
the first ( left ) intensified zone to cover the starting ( refer
ence ) point .
.
Time Interval On Single Waveform
The built - in
Delta Time
function provides
tremendous
flexibility for making general timing measurements . An inter
nal circuit
generates
two
different
delay times
alternately
which results in two intensified zones on the A Sweep . The
A TIME
POSITION
control
adjusts
the
separation
of
the two
intensified zones , and in conjunction with the B DELAY
TIME
POSITION
control , allows the
start of each
B
Sweep
to be positioned at any desired waveform location . In B
RUNS AFTER DLY mode , the time interval is measured and
displayed on the readout . This is a nontriggered delta time
measurement
.
9. Adjust the A TIME POSITION control to move the sec
ond
intensified zone to
cover the ending
(
measurement
)
point
.
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10. To perform a nontriggered measurement see step 11 ,
and to perform a triggered measurement see step 12 .
11. Adjust both B DELAY TIME POSITION and A TIME
POSITION controls until the points of interest on the two B
traces intersect at any convenient vertical graticule line .
Read the time interval on the readout .
UU
U
In triggered delta time measurement mode , the time in
terval
to
be
measured is
defined by
similar pulse
edges
( i.e.
positive or negative slopes ) . The B Sweep is triggered on
those edges alternately and the time between the trigger
events is measured and displayed on the readout . The inten
sified zones relocate to correspond with the starts of their
respective B Sweeps . Because this mode eliminates oscillo
scope delay time jitter from the measurement , displayed re
sults are much more stable .
12. Adjust the B TRIGGER LEVEL control counterclock
wise to
midrange position to trigger
at the desired
threshold
on the waveform . Read the time interval on the readout .
4
Rise Time
Use
the following procedure to perform both
nontriggered and triggered delta time measurements on sin
gle
waveforms
.
The following technique describes how to measure rise time
between the 10 % and 90 % points of the low to high transi
tion of the selected waveform using a nontriggered delta
time measurement . Fall time is measured between the 90 %
and 10 % points of the high to low transition of the
waveform .
1. Preset instrument controls and obtain a baseline trace .
2. Apply the signal to either vertical - channel input con
nector and set
the
VERTICAL MODE
switch to display
the
channel used .
1. Preset instrument controls and obtain a baseline trace .
3. Set the appropriate VOLTS / DIV switch for a conve
nient amplitude display of the waveform .
2. Apply the signal to either vertical - channel input con
nector and set the VERTICAL MODE switch to display the
channel used ,
4-8

Tektronix 2236 Specifications

General

Brand	Tektronix
Model	2236
Category	Test Equipment
Language	English