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APPLICATION
PROBE COMPENSATION
To obtain an accurate measurement result, the probe must
be adjusted correctly before measurement.
1. Connect the probe to the INPUT terminal and set the
control for a normal sweep display.
2. Connect the probe to the PROBE ADJ terminal on the
front panel, and adjust the SWEEP TIME/DIV control to
display a few cycles of the signal output from it.
3. Adjust the trimmer on the probe to obtain the following
correct compensation waveform.
Correct
compensation
Over
compensation
Insufficient
compensation
TRACE ROTATION COMPENSATION
Rotation from a horizontal trace position can be the cause
of measurement errors.
Adjust the controls for a single display. Set the AC-GND-DC
switch to GND and TRIG MODE
to AUTO.
Adjust the ,
POSITION control such that the trace is over the center
horizontal graticule line. If the trace appears to be rotated
from horizontal, align it with the center graticule line using
the TRACE ROTATION control located on the front panel.
DC VOLTAGE
MEASUREMENTS
This procedure describes the measurement
procedure for
DC waveforms.
Procedure:
1. Connect
the
signal
to
be
measured
to the
INPUT
jack.Set the vertical MODE
to the channel to be used
(unapplied to CS-1020 and 1010). Set the VOLTS/DIV
and SWEEP TIME/DIV switch to obtain a normal display
of the waveform
to be measured.
Set the VARIABLE
controlto the CAL position.
2. Set the TRIG MODE to AUTO and AC-GND-DC
to the
GND position, which established the zero volt reference.
Using the + POSITION control, adjust the trace position
to the desired reference level position, making sure not
to disturb this setting once made.
3. Set
the AC-GND-DC
switch
to the
DC
position
to
observe the input waveform,
including its DC compo-
nent.
If an appropriate
reference
level or VOLTS/DIV
setting was not made, the waveform may not be visible
on the CRT screen at this point. If so, reset VOLTS/DIV
and/or the # POSITION control.
4. Use the <»
POSITION
control to bring the portion of
the waveform
to be measured
to the center
vertical
graduation line of the CRT screen.
5. Measure the vertical distance from the reference level to
the point to be measured,
(the reference
level can be
rechecked by setting the AC-GND-DC
switch again to
GND).
Multiply
the
distance
measured
above
by
the
VOLTS/DIV
setting and the probe attenuation
ratio as
well. Voltages above and below the reference level are
positive and negative values respectively.
Using the formula:
DC level=Vertical distance in divisions
x (VOLTS/DIV
set-
ting) x (probe attenuation ratio).
Measuring point adjusted to the center
vertical scale by <» POSITION
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Vertical
distance
Ground potential adjusted by
4 POSITION (reference line)
Fig. 11
[EXAMPLE]
For the example, the point being measured is 3.8 divisions
from the reference level (ground potential).
lf the VOLTS/DIV was set to 0.2 V and a 10:1 ptobe was
used. (See Fig. 11)
Substituting the given values:
DC level= 3.8 (div) x 0.2(V) x 10=7.6 V
19
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