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The knob and hook cover may be turned in any
direction, but care must be used not to discon
nect the ground over that holds the hood cover
in place by an internal spring, which could
loosen or break.
(4) Measurement
The probe exhibits high resistance and low
capacitance at x 10 however, the input voltage
is attenuated to 1/10 and.
This must be
accounted for in voltage measurements.
Measured voltage = Sensitivity of oscilloscope
V/DIV. X screen amplitude div x 10 At x 10, it
is necessary to correct the pulse characteristic
by adjusting the capacitor in the probe for
flat top of the square wave calibration voltage.
(5) Adjustment of Probe
When observing the signal waveforms of high
impedance circuits, the operation of the signal
source and waveforms on the screen may change
due to the input impedance of the oscilloscope,
parallel capacitance of a coupling line, induc
tion noise and other effects leading to measure
ment error.
The use of a low-capacitance probe
avoids these effects.
A low-capacitance probe
be used for high impedance circuitry measure
ments.
Its input impedance is lOMH at 22pF.
When adjusting the probe observing CAL @ ,
adjust the capacitance correction trimmer in
the probe using a small screw driver, to pro
vide proper square wave compensation.
Capacitance correction trimmer
Under
Correct
Over
N
K-
12
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