Triggering 4
InfiniiVision 7000B Series Oscilloscopes User’s Guide 109
External Trigger Input
The External Trigger input can be used as a source in several of the
trigger types.
On 2- channel oscilloscopes, the external trigger BNC input is on the front
panel and is labeled Ext Trigger.
On 4- channel oscilloscopes, the external trigger BNC input is on the rear
panel and is labeled Ext Trig.
2-Channel Oscilloscope External Trigger Input
External Trigger Probe Settings
You can set external trigger probe parameters as described below.
1 Press the [Mode/Coupling] key in the Trigger section of the front panel.
2 Press the External softkey to display the External Trigger Menu.
Probe Attenuation Turn the Entry knob to set the attenuation factor
displayed in the Probe softkey for the connected probe. The attenuation
factor can be set from 0.1:1 to 1000:1 in a 1- 2- 5 sequence.
When you connect an AutoProbe self- sensing probe, the oscilloscope will
automatically configure your probe to the correct attenuation factor.
The probe correction factor must be set properly for measurements to be
made correctly.