User Manual

Functional Description
27
4.1.7. Adjustment of the triggering level, "TRIGGER",
a) from the keypad
Adjustment of the triggering level on the mean value of the signal (50%) without modifying the
coupling of the trigger. A press combined with a CHx key starts the same function, but first selects
the corresponding channel as triggering source
Selection, by successive presses, of the triggering slope (positive or negative).
The slope is indicated in the status zone.
Selection, by successive presses, of one of the following acquisition modes:

Single-shot = SINGLE (sgl)" on the screen,

Triggered (trig'd)

Automatic (Auto) = REFRESH

"SINGLE-SHOT" mode:
A single acquisition triggered by the trigger by pressing the RUN HOLD key is allowed.
For another acquisition, the triggering circuit must be reset by pressing the RUN HOLD key.
The ROLL mode is automatically activated.

"TRIGGERED" mode:
The content of the screen is updated only in the presence of a triggering event linked to the
signals present on the inputs of the oscilloscope (CH1, CH2, CH3, CH4).
In the absence of any triggering event linked to the signals present on the inputs (or in the
absence of signals on the inputs), the trace is not updated.

"AUTOMATIC" mode:
The content of the screen is updated even if the triggering level is not detected in the signals
on the inputs.
In the presence of a triggering event, the refreshing of the screen is managed as in the
"Triggered" mode.

Acquisitions in the "TRIGGERED" and "AUTOMATIC" modes are enabled or stopped.

The triggering circuit in the "SINGLE-SHOT" mode is reset.

Acquisition is started according to the conditions defined by the acquisition mode
(SINGLE REFR).

The status of the acquisition is indicated in the status zone:

RUNNING  started

STOP  stopped

PRETRIG  acquisition