Tektronix 2236 User Manual

Operating Procedures - 2236 Operators
INTENSIFIED
ZONE
TO BE
MAGNIFIED
U
Using delayed - sweep magnification may produce a dis
play with some slight horizontal movement ( pulse jitter ) .
Pulse jitter includes not only the inherent uncertainty of trig
gering the delayed sweep at exactly the same trigger point
each time , but also jitter that may be present in the input
signal . If pulse jitter needs to be measured , use the “ Pulse
Jitter Time Measurement ” procedure which follows the dis
cussion of “ Magnified Sweep Runs After Delay . "
士
100
-...
90
( A ) A INTENSIFIED
DISPLAY
Magnified Sweep Runs After Delay
The following procedure explains how to operate the B
Sweep in a
nontriggered mode
and to
determine the result
ing
apparent
magnification
factor
.
1
10
U
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 .
( B ) B DELAYED DISPLAY
4207-21
3. Set the appropriate VOLTS / DIV switch to produce a
display
of
approximately
2 or 3
divisions in
amplitude and
center
the
display
.
Fig . 4-5 . Delayed - sweep magnification .
4. Set the A
SEC / DIV switch
to a sweep
speed which
displays at least one complete waveform cycle .
UU
EXAMPLE : Determine the apparent magnification of a dis
play with an A SEC / DIV switch setting of 0.1 ms and a B
SEC / DIV
switch setting of 1
us .
5. Select ALT HORIZONTAL MODE . Adjust both the ap
propriate
channel POSITION
control
and
the A / B SWP
SEP
control to display the A trace above the B trace .
Substituting
the
given
values :
บ
Apparent
Magnification
"
1 x
10-45
1 x
10-6S
10-2 – 100
6. Adjust the B
DELAY TIME
POSITION control to posi
tion the start of the intensified zone to the portion of the
display to be magnified ( see Figure 4-5 ) .
u
Pulse Jitter Time Measurement
7. Set the B SEC / DIV switch to a setting which intensi
fies the full portion of the A trace to be magnified . The inten
sified zone will be displayed as the B trace ( see Figure 4-5 ) .
The B HORIZONTAL MODE May also be used to magnify
the
intensified
portion
of
the A
Sweep
.
To measure
pulse jitter time
:
1. Perform steps 1 through 7 of the preceding “ Magnified
Sweep Runs
After Delay "
procedure
.
8. The
apparent
sweep magnification
can be
calculated
from the following formula :
2. Referring
to
Figure 4-6
, measure
the
difference be
tween Point C
and Point D in
divisions
and
calculate the
pulse
jitter
time using
the
following
formula :
Apparent
Delayed
Sweep
Magnification
Pulse
Jitter
Time
A
SEC /
DIV
switch
setting
B SEC /
DIV
switch
setting
х
Horizontal
difference
( divisions )
B SEC / DIV
switch
setting
4-6
บ

Tektronix 2236 Specifications

General

Brand	Tektronix
Model	2236
Category	Test Equipment
Language	English