Tektronix 2221 User Manual

Controls , Connectors , and Indicators -- 2221 Operators
37 ) PLOT Controls - Control waveform transmission
over the X - Y PLOTTER output .
CURSORS Position Control - Provides for hor
izontal positioning of the active cursor ( or active
cursors when there are two waveforms displayed
in a display set ) . Cursor positioning continues to
function during SAVE mode , and measurements
can be made on
any
displayed waveform . Cursor
positions are independently selectable between
the
Reference and
Acquisition
waveform
sets . A
1K
waveform
window
is
always displayed
around
the
active
cursor .
MANUAL - Pushing this button starts the plotting
process
any
time the
instrument
is in
STORE
mode and is not presently plotting . Normaily , only
the displayed waveforms , trigger points , and
readout are plotted ( see " Plotting the Graticule "
in
Section
4
) .
u
U
Cursors
are
placed on all
waveforms
in
a
display
set . A display set is one or both waveforms from
the Acquisition ( CH 1 and / or CH 2 ) or Reference
( CH 1
and
/
or CH 2
) .
The
acquisition
parameters
of the
waveform
set
in which the
cursors are
located are displayed in the crt readout . Cursors
movable by the CURSORS Position control
( active ) are
enclosed
in a box
.
If a plot is
in progress
, this
button controls
plot
speed . Each push of MANUAL , while plotting ,
decrements the plot speed until the slowest
speed is reached . The next button push causes
the speed to increase to the highest speed . Ten
speeds are
available
. At power -
up , plot speed
is
set to the
slowest
speed
.
A bar graph
indicates
the
position
of the
display
window
within
the
acquisition
record
.
The
position
of the
display window is
adjusted to
provide
a
display of the active cursor position . If the active
cursor is positioned to either edge of the display
window , further positioning starts the waveform
display scrolling in the opposite direction as the
display - window position moves . Display - window
positioning can be continued to the ends of the
record , allowing observations and measurements
to be made
over the
entire 4K
acquisition record .
AUTO - Toggles between AUTO and MANUAL
PLOT
modes
. In AUTO
PLOT a
plot is
started
each
time the
number
of
acquisitions or
pairs of
acquisitions ( ALT VERTICAL MODE ) defined in
Table 3-4 are acquired . Plots continue until the
instrument is toggled back to MANUAL PLOT .
u
The first plot after AUTO PLOT is activated
draws the graticule and waveform ( s ) ( and readout
if the readout is on ) . Upon entering AUTO PLOT
mode :
1. A
waveform ( s ) is
acquired
.
2.
Plotting
begins
.
SELECT C1 / C2 ( cursor select ) Switch - This
switch
selects
the
cursor
( s )
that can
be
positioned
with the
CURSORS
position
control
.
Cursors
are
activated alternately with each press of the C1 / C2
button . Each
selected
cursor
is
enclosed
in a
box .
Table 3-4
ui
Acquisitions Betore a Piot
AT / 1 / AT Switch - Toggles between Delta Time
and One
Over Delta Time
for display
in the
readout .
Acquisitions
Required
Sweep
Speed
Acquisition
Mode
100
0.05
us
/
div
REPETITIVE
U
50
0.1
us
REPETITIVE
50
0.2
us /
div
REPETITIVE
36 )
REFERENCE Controls -
Control the
saving and
displaying of reference waveforms .
30
0.5
us /
div
REPETITIVE
12
1 us / div
REPETITIVE
12
2
us
/
div
REPETITIVE
SAVE REF
Control
-
When pressed
while
in
STORE
mode
,
causes the
displayed
acquisition
waveform to be
saved in
the
reference
memory .
u
1
50
ms
/
div to 5
us /
div
RECORD
1
EXT
CLK
to
0.1 s /
div
SCAN
DISPLAY ON /
OFF
Toggles the
display of
the
reference waveform on and off .
NO AUTO PLOT
ROLL
3-12

Tektronix 2221 Specifications

General

Brand	Tektronix
Model	2221
Category	Test Equipment
Language	English