Chapter 5 137
Analog Measurements - Screens and Control Fields
Internal Level (div)
Internal
This field selects the trigger source.
• Internal uses the signal being displayed for triggering.
• Ext (TTL) uses the EXT SCOPE TRIGGER INPUT for triggering.
This is a TTL level trigger (approximately 2.5 V).
Screens on which this field is displayed
SCOPE: trigger controls menu
Level (div)
This control is divided into two fields:
The upper field (0.00) sets the internal trigger level as a function of
vertical divisions. The trigger level is indicated by small pointers that
appear on each side of the screen (only used for internal triggering).
The lower field (Pos/Neg) specifies whether triggering happens when
the waveform being measured is positive-going (Pos
), or negative-going
(Neg
).
Screens on which this field is displayed
SCOPE: trigger controls menu
