portion coincides with a graticule line and the upper por
tion is in the viewing area. Horizontally position the dis
play so one of the upper peaks lies near the center vertical
line (see Fig. 10).
Measure the divisions of vertical deflection from peak to
peak and multiply the vertical deflection by the VOL TS
mA/DIV control setting.
POSITION
TO CENTER
VERTICAL LINE
----,---- �++-++-I++++++¼+�
VERTICAL
DEFLECT I ON
>----+--....___..
__
____.
___
..._
____
_,__--1
_____
l
____
>----+---+-+-+-t-----+----+-+-__,_____.
1480-4
Fig. 10. Peak to peak voltage of a waveform.
EXAMPLE: The peak-to-peak vertical deflection measured
is 4.6 divisions (see Fig. 10) with the VOL TS-mA/O IV con
trol set at .5.
Using the formula:
Volts
Peak-to-Peak
Substituting:
vertical
deflection
(divisions)
4.6 x .5 = 2.3 V
Instantaneous DC Voltages
X
VOL TS-mA/DIV
setting
Make sure the VOL TS-mA/DIV VAR control is in the cali
brated detent. Alternately switch the INPUT COUPLING
switch between GND and DC to establish the polarity of
the signal. If the waveform deflection is above the reference
graticule line, the voltage is positive; below the line is nega
tive. If the voltage to be measured is positive, set the IN
PUT COUPLING switch to GND and position the trace to
the bottom graticule I ine. Do not move the vertical POS
control after this reference I ine is established.
Set the INPUT COUPLING switch to DC. Measure the div
isions of deflection between A and B (see Fig. 11). Multiply
the vertical deflection by the VOL TS-mA/DIV control set
ting.
20
213 Operators
@
Summary of Contents for 200 Series
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Page 8: ...213 DMM Oscilloscope 213 Operators ...
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