AEMC OX 7102 III, User Manual

Page: 43 / 226

Oscilloscope Mode - The Keys
SCOPIX IV - 43
Oscilloscope Mode (cont’d)
4 "Trigger" keys
Sets the trigger
level
to the average value of the signal (50%) without
modifying the trigger coupling.
When pressed in combination with a
CHx
key, this activates the same the
same function, after first selecting the corresponding channel as the trigger
source.
Selects the trigger
slope
(up or down ) by successive presses.
The slope is indicated in the status area.
Successive presses can be used select one of the following
acquisition
modes
:
Single shot (Mono) = SINGLE
Triggered Trig
Automatic (Auto) = REFRESH
•
"
SINGLE" mode
:
In Single Shot mode, a single acquisition is armed by pressing the RUN
HOLD key. After receiving a trigger, the waveform is displayed and the
instruments returns to HOLD mode. For any further acquisition, the
acquisition must be rearmed by pressing the RUN HOLD key.
If the time base is less than 100 ms/div SINGLE mode can be
accessed via the "Mono (< 100 ms/div)" option.
If not, Single mode can be accessed via the “Roll Mono (> 50ms/div.)”
option and ROLL mode is automatically activated.
•
"
TRIGGERED
"
mode:
The screen's content is only refreshed when there is a trigger event linked
to the signals present on the oscilloscope's inputs (CH1, CH2, CH3, CH4).
If there is no trigger event linked to the signals present on the inputs (or if
there is no signal on the inputs), the trace is not refreshed.
•
"
AUTOMATIC
"
mode
:
The screen's content is refreshed even if the trigger level is not detected
on the signals present on the inputs.
When there is a trigger event, screen refreshing is managed as in the
"Triggered" mode.
• allows acquisition to be started and stopped in "TRIGGERED" and
"AUTOMATIC" modes.
• rearms the trigger circuit in "SINGLE" mode.
Acquisition is initiated according to the conditions defined by the acquisition
mode (
SGLE REFR
key).
The acquisition status is indicated in the status area:
RUN
= started
STOP
= stopped
PRETRIG
= acquisition
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