Tektronix 2236 - Triggered Magnified Sweep; TIME AND FREQUENCY MEASUREMENTS; Period Measurement; Frequency Measurement

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Operating Procedures - 2236 Operators
INTENSIFIED
ZONE
TO BE
MAGNIFIED
2. Apply the
signal to
either
vertical - channel
input con
nector and set the VERTICAL MODE switch to display the
channel used .
C
100
3.
Adjust
the
A TRIGGER
LEVEL control to obtain
a sta
ble
display . A
TRACE
B TRACE
4. Set the A SEC / DIV switch to a position that displays
the point of interest within the graticule area .
10
OX
D
5. Set UPPER FUNCTIONS - LOWER FUNCTIONS
switch to IN and press in the PER button .
JITTER
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Л
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1
Л
MEASURE
TIME FROM
C TO
D
4205-10
6. Read the period between repetitive pulses on the
readout .
Fig . 4-6 . Pulse jitter .
Frequency
Triggered Magnified Sweep
The following procedure explains how to operate the B
Sweep in a triggered mode and to determine the resulting
apparent magnification factor . Operating the B Sweep in a
triggered mode provides a more stable display , since the
delayed display is
triggered at the same
point each time
.
For frequency
measurements
, use the
same
method as
previously
described in
“
Period
"
procedure ,
except that
in
step 5 , the FREQ
button
is pressed in
along with
the UP
PER FUNCTIONS - LOWER FUNCTIONS switch . The read
out will then display the frequency measurement .
Width
1.
Perform steps 1 through 7
of the
preceding "
Magnified
Sweep Runs After Delay ” procedure .
2. Adjust the B TRIGGER LEVEL control so the intensi
fied zone on
the A trace
is stable .
When in WIDTH mode , the CTM measures the time inter
val between a point on the first slope of the selected polarity
and the same point on the following slope of the opposite
polarity . For
waveforms
with either
slow rise
time or
fall
time , width measurement can be made more accurately by
adjusting
the A
TRIGGER
LEVEL
control so
that the
start
of
the trace is at the 50 % point of the waveform . The A Trigger
threshold affects the width measurement and should be set
carefully .
NOTE
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The intensified zone seen in the ALT HORIZONTAL
MODE display will move from trigger point to trigger
point as the
B
DELAY
TIME
POSITION
control is
rotated .
NOTE
The “ no
A trig '
message is
not
used in this
function ,
allowing
indefinite
display of
measurement
results .
3. The
apparent
magnification
factor can be
calculated
from the formula shown in step 8 of the “ Magnified Sweep
Runs
After Delay "
procedure .
1. Preset instrument controls and obtain a baseline trace .
TIME AND FREQUENCY MEASUREMENTS
Period
2. Apply the signal to either vertical - channel input con
nector and set the VERTICAL MODE switch to display the
channel used .
To measure period between repetitive pulses use the fol
lowing
procedure :
1. Preset instrument controls and obtain a baseline trace .
3. Select NORM A TRIGGER mode ,
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