1-3
IM 701610-01E
Functions
1
1.2
Setting the Vertical and Horizontal Axes
Time Axis <Sections 5.11 and 5.12>
Selection of the Timebase
With the default settings, sampling timing is controlled by the clock signal output from the
timebase circuit of the instrument (see the Block Diagram, section 1.1). The sampling
timing can be controlled by an external clock signal instead of the clock signal from the
timebase circuit.
An external clock signal can be input to the EXT CLOCK IN terminal on the rear panel.
This external clock function is useful when you are observing a signal whose period
varies or when you are observing a waveform by synchronizing it with the clock signal to
be measured.
Setting the Time Axis
When using the internal clock, set the time axis scale as a time duration per division of
the grid. The setting range is 2 ns/div to 800 s/div. The time range in which waveform is
displayed is “time axis setting x 10,” as the display range along the horizontal axis is 10
divisions.
1 div = 500
µ
s
10 div
1 div = 1 ms
Note
Display of Time Axis Direction
The sampled data is read into the acquisition memory, and a waveform is displayed based on
this data. The number of data stored into the acquisition memory differs depending on
settings such as time axis settings, trigger mode, and acquisition mode.
The number of display lines in the time axis direction on a 10 - div screen is 500 lines.
Processing therefore varies according to record length, as described immediately below. (for
more details on the relation between time axis, acquisition mode, record length of acquisition
memory and displayed record length, see Appendix 1).
•
If displayed record length exceeds number of screen display points, multiple data points
are connected with a line and displayed at the same time axis position.
•
If displayed record length is less than number of screen display points, the oscilloscope
interpolates the data to generate the display. (See page section 1.4)
500 Lines
0
500
Display Record Length
Sampling Data
Time Axis
Record Length of
Acquisition Memory
Voltage Axis
