by the number of cycles present in the given time span.
If "x 10 MAG" is used multiply this further by 10.
Note that errors will occur for displays having only a few
cycles.
Freq =
Horizontal distance (div) x SWEEP TIME/DIV setting
Adjust to the vertical scale
with POSITION
Pulse length
(at 50%)
Align the waveform
with the center using
POSITION
Fig.
17
[EXAMPLE]
For the example, the distance (width) at the center horizon-
tal line is 4.6 divisions and the SWEEP TIME/DIV is 0.2 ms.
(See Fig. 17)
Substituting the given value:
Pulse width = 4.6 (div) x 0.2 ms = 0.92 ms
[EXAMPLE]
For the example, within 7 divisions there are 10 cycles.
The SWEEP TIME/DIV is 5 fis. (See Fig. 16)
Substituting the given value:
10
Freq= =285.7 kHz
7 (div) x 5 (/*s)
PULSE WIDTH MEASUREMENTS
Procedure:
1.
Apply the pulse signal to the INPUT jack. Set the vertical
MODE to the channel to be used (unapplied to CS-1020
and 1010).
2.
Use the VOLTS/DIV, VARIABLE and y POSITION to ad-
just the waveform such that the pulse is easily observed
and such that the center pulse width coincides with the
center horizontal line on the CRT screen.
3. Measure the distance between the intersection of the
pulse waveform and the center horizontal line in
divi-
sions.
Be sure that the VARIABLE is in the CAL. Multiply
this distance by the SWEEP TIME/DIV and by 1/10 is
"x 10 MAG" mode is being used.
Using the formula:
Pulse width = Horizontal distance (div) x (SWEEP TIME/DIV
setting)x "xMAG IC'value
-1
(1/10)
PULSE RISETIME AND FALLTIME MEASUREMENTS
For risetime and falltime measurements, the 10% and
90%
amplitude points are used as starting and ending
reference points.
Procedure:
1.
Apply a signal to the INPUT jack. Set the vertical MODE
to the channel to be used (unapplied to CS-1020 and
1010).
Use the VOLTS/DIV and VARIABLE to adjust the
waveform peak-to-peak height to six divisions.
2.
Using the
T
POSITION control and the other controls,
adjust the display such that the waveform is centered
vertically in the display. Set the SWEEP TIME/DIV to as
fast a setting as possible consistent with observation of
both the 10% and 90% points. Set the VARIABLE to
CAL.
2.
Use the POSITION control to adjust the 10% point
to coincide with a vertical graduation line and measure
the distance in divisions between the 10% and 90%
points on the waveform. Multiply this by the SWEEP
TIME/DIV and also by 1/10, if "x 10 MAG" mode was
used.
NOTE:
Be sure that the correct 10% and 90% lines are used. For
such measurements the 0, 10, 90 and 100% points are
marked on the CRT screen.
Using the formula:
Risetime = Horizontal distance (div) x (SWEEP TIME/DIV
setting) x " x 10 MAG" value"
1
(1/10)
22
Count cycles between this portion
Fig.
16
Using the formula:
# of cycles x " x 10 MAG" value
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