Tektronix 47E5A

TIME-DIFFERENCE BETWEEN
TWO PULSES FROM
DIFFERENT SOURCES
Obtain a Normal Sweep Display. Make sure the VAR
TIME/DIV control is in the calibrated detent. Set the A
Trigger SOURCE switch to CH 1. Connect the reference
signal to CH 1 and the comparison signal to CH 2. Connect
the signals to the input connectors using probes or cables
with equal time delay.
Set the VERT MODE switch to either CHOP or ALT . In
general,
CHOP is more suitable for low-frequency signals
and the AL T position is more suitable for high-frequency
signals. Center each of the displays vertically (see Fig. 20).
Measure the horizontal difference between the two
signals. Multiply the measured difference by the setting of
the TIME/DIV switch; if sweep magnification is used,
divide this answer by 10.
EXAMPLE: The TIME/DIV switch is set to SO IlS, the
MAG switch to X10 and the horizontal difference between
waveforms is
4.S divisions (see Fig. 20).
CHANNEL 1 (REFERENCE) CHANNEL 2
\
r
I
\
j
.!
\
L
.. '
50%
AMPLITU
LEVEL
~ ~
' @,
I
..!
I
[
®-
I ,
I
I
I
---l HORIZONTAL 1 ___
I DIFFERENCE I
M EASURE
ME FROM
A TO B
TI
465/DM-O-14
Fig. 20. Time difference between two pulses from different
sources.
USing the formula:
Time / Div
setting
x
horizontal
difference
(divisions)
Time
Difference
magnification
Substituting the given values:
Time 60lls X 4.S
Difference 10
22.S microseconds
40 475A/DM44 Operators
@
I
I
I
I
I
I
I
I
I