AEMC OX 7102 III, Руководство пользователя

Страница: 68 / 226

Oscilloscope Mode - The "Trigger" Menu
IV - 68 SCOPIX
Oscilloscope Mode (cont'd)
Parameters
Selection of the "Trigger Parameters".
Main
Trigger on edge
Source
selects a channel as a trigger source.
Coupling
Selection of the
filter
for the main trigger source:
AC
AC coupling (10 Hz to 200 MHz):
blocks the DC component of the signal
DC
DC coupling (0 to 200 MHz):
allows the entire signal through
LF Reject
Rejection of source signal frequencies < 10 kHz:
facilitates observation of signals with a DC
component or an unwanted low frequency
HF Reject
Rejection of source signal frequencies > 10 kHz:
facilitates observation of signals with high-frequency
noise.
The symbol used to indicate the curve trigger level on the curve also indicates the
coupling:
DC
AC
LF Reject
HF Reject
Edge
Selection of the trigger gradient:
+
ascending trigger edge
-
descending trigger edge
The selected trigger edge is indicated in the status area.
Level
2.04V Adjustment of the trigger level with the stylus on the scroll bar.
The trigger level is entered into the current value display area after modification.
Fine adjustment is possible.
Noise reject
No:
hysteresis ≈ 0.5 div.
Yes:
introduces a hysteresis of ≈ 1.5 div.
Holdoff
108µs allows:
• disabling of the trigger for a predefined period
•
stabilization of the trigger on pulse trains.
Double-tapping in this field displays a virtual numeric keypad which can be used
to directly input the value.
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