AEMC OX7102-CII, User Manual

Page: 36 / 208

Oscilloscope Mode - The Keys
IV - 36 SCOPIX Oscilloscopes
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
function, after first selecting the corresponding channel as the trigger
source.
Selects the trigger gradient (up or down ) by successive presses.
The gradient 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 :
A single acquisition is authorized, triggered by pressing the RUN HOLD
key .
For any further acquisition, the trigger circuit must be reset 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 (> 50
ms/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.
•
Resets 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