Agilent Technologies 53181A - To Set Input Channel Trigger Level;Sensitivity; Changing Trigger Mode

Chapter 1 Getting Started
Making Measurements
1-16 Operating Guide
1
If you want to change the input impedance back to the default 1 MΩimpedance,
perform the following step.
To Set Input Channel Trigger Level/Sensitivity
Changing Trigger Mode
Press any one of these arrow keys to toggle to the next state of Auto Trigger.
50Ω
1MΩ
Freq Ch 1
MHz
Gate
Trigger
Sensitivity
Enter +
/
–