Tektronix 2246 User Manual

Measurement Processes and Applications-— 2246 Operators
bs.
3. Use the I- OR DELAY control to position the refer-
MOVABLE
DC
VOLTS
ence
cursor
to
the
point
on
the
waveform
to
be
measured
CURSOR
from.
Use
the
-I
OR
A
control
to
position
the
independent
cursor to the second point of interest. Then, read the time
difference value in the top line of crt readout.
cee et
Pulse Period Measurement
This measurement is basically a time-difference
measurement. The i- SEC -i cursors are positioned to
define a full period of the input waveform and the time
difference value displayed is the pulse period. Use the
setup for making time-difference measurements as a
guideline for making pulse period measurements (see
Figure 6-11).
Einf
Frequency Measurement
GROUND
CURSOR A frequency measurement is made the same as the
pulse period measurement; the difference being that the
l- 1/SEC -| cursors are selected from the CURSORS
menu. The measurement value displayed with units of fre-
quency. When the exact pulse period is defined by posi-
tioning the cursors, the frequency of the signal is
NOTE displayed. Use the same front panel setup as for making a
time-difference measurement as a guideline for making fre-
The
test
signal
used
for
illustration
purposes
shown
quency
measurements
with
cursors
(see
Figure
6-12).
in
Figure
6-10
is
a video
test
signal.
For
triggering
on
video waveforms, select TV LINE Trigger COUPLING
and negative Trigger SLOPE; for other signal types, i 7
no change of COUPLING or SLOPE is required. Rise-Time Measurements
Making rise-time or fall-time measurement requires
some additional signal scaling to use the graticule rise-time
l Figure 6-10. Instantaneous dc voltage measurement.
ei
Time Difference
Use the following procedure steps as a Quideline in
making time difference measurements using the l- SEC -~i PULSE PERIOD
cursors. As with the i- VOLTS -| cursors, the i- OR
DELAY control positions both cursors together, and the -I
OR A control positions the independent cursor.
1. Set up the signal to be measured and the front
panel controls as indicated in steps 1 and 2 of the +PEAK
VOLTAGE MEASUREMENT procedure.
2. Select a SEC/DIV setting that provided no more
cycles of the applied waveform than necessary to display
the measurement points of interest. This is to improve the
accuracy
of
cursor
placement
for
the
measurement.
EEE
j NOTE
% The independent A cursor cannot be positioned in
a
front
of
the
reference
cursor.
Figure
6-11.
Pulse
period
measurement.
|
REV
APR
1987
6-13
But

Tektronix 2246 Specifications

General

Brand	Tektronix
Model	2246
Category	Test Equipment
Language	English