User`s manual
1-5
IM 701610-01E
Functions
1
Vertical Sensitivity <Section 5.8>
The V/div (vertical sensitivity) setting is used to adjust the amplitude of the displayed
waveform so that the waveform can be observed easily.
The V/div setting is made by setting the voltage value per division on the screen grid.
The vertical sensitivity setting operates by switching to a different attenuator (attenuation
rate). The setting changes in steps (1 V/div → 2 V/div → 5 V/div ...).
In addition, by performing computations on the digital data acquired using the voltage
sensitivity above, the waveform can be displayed at a sensitivity of 0.4 (or 0.5) to 10
times the voltage sensitivity that was used to acquire the data (Variable).
1 div = 1 V 1 div = 0.50 V
When V/div is Switched from 1 V/div to 0.50 V/div
Note
Vertical Sensitivity and Measurement Resolution
To get precise readings, it is recommended that you set the vertical sensitivity so that the
waveform’s maximum and minimum amplitudes are close to the top and bottom of the screen.
Note that the instrument uses 8-bit A/D converters. Incoming signals are sampled at a
resolution of 255 levels (LSB), or 32 levels per division.
Effective Data Range
The instrument uses 8-bit A/D converters. Assuming that output values range from 0 to 255,
the vertical center line of the display corresponds to a value of 127. Because the A/D
converter reaches full range at 255, screen level 256 is not used.
Note also that the insturment treats an A/D output value of 0 as if it were a 1.
The screen’s effective display range extends approximately 5.29 divisions in each direction
from the screen’s center line.
However, if the vertical axis position is moved while the data acquisition is stopped, the
effective data range also moves by the same amount.
Vertical Position <Section 5.2>
Since a total of four input waveforms can be displayed, they may overlap each other
making observation difficult. In this case, the waveforms can be moved in the vertical
direction so that they can be observed more easily.
The vertical position mark can be set to any value in the range between ±4 div.
Changing the V/div setting, the vertical axis setting is rescaled with respect to the vertical
position.
Position: 2 div
Position: –2 div
Position: 0 div
1.2 Setting the Vertical and Horizontal Axes