6
Controls
Oscilloscope mode
VOLTS/DIV
Selected value indicates the peak-to-peak voltage required to produce a peak-to-peak deflection of one
major division on the screen.
Coupling
AC
: the input signal is capacitive coupled to the input amplifier/attenuator. Only the AC components are
measured.
DC
: the input signal is directly connected to the input amplifier/attenuator. Both AC and DC voltage are
measured.
TIME/DIV
Selects the time setting for the beam to sweep one major division on the screen
By selecting different TIME/DIV settings it is possible to
zoom
the frozen waveform on the screen.
"Equivalent Time Sampling"
ETS mode
is in use on 50us/div, 20us/div and 10us/div ranges.
Triggering is set ON to get stable waveform images.
This mode is usable only for repetitive signals.
There is no pre-trigger option in this mode.
In this sampling mode the oscilloscope uses successive triggering occurrences to gather the data to
construct a picture of a repetitive signal.
TRIGGER On/Off
Selects free run mode or trigged mode.
TRIGGER Level
Selects the signal level at which the sweep is triggered.
Triggering reference mark is displayed with the horizontal line on the left side of the screen.
TRIGGER Edge
Selects the triggering slope:
Up: Trigger occurs when triggering signal crosses trigger level in a positive going direction.
Dn: Trigger occurs when triggering signal crosses trigger level in a negative going direction.
TRIGGER Find
Resets the triggering x-position reference point. Triggering reference mark is displayed with the vertical line
on the bottom of the screen.
RUN
Selects recurrent display update mode (RUN). Pressing the button again freezes the display.
SINGLE
When button is depressed and the trigger level is reached, refreshment of the display takes place only
once.
When this button is down the scope captures many acquisitions of a signal to the screen. Record points
accumulate until you release the button.
Autoset
Automatic setup for the Volts/div, Time/div, and Trigger level to produce a stable waveform of usable size.
The trigger will be set on if the wave aplitude on the screen is more than 0.5 divisions.
The signal should be repetitive for proper autoset function: Amplitude 100mV to 30V; frequency above 50Hz;
duty cycle greater than 10%.
