Agilent Technologies 53181A - To Select Input Coupling and Impedance; Selecting Input Coupling; Selecting Input Impedance

Chapter 1 Getting Started
Making Measurements
Operating Guide 1-15
1
If you need or want to change CHANNEL 1’s coupling, impedance, and triggering
conditions to match the input signal you are trying to measure, the next procedures
“To Select Input Coupling and Impedance” and
“To Set Input Channel Trigger Level/Sensitivity” demonstrate this. Perform these
procedures whether or not you want to customize the Counter’s input conditions to
measure your signal; doing this will help you become familiar with the DC/AC,
50Ω/1MΩ, and Trigger/Sensitivity keys.
To Select Input Coupling and Impedance
Selecting Input Coupling
Channel 1’s input coupling is now set to dc.
If you want to change the coupling back to the default ac coupling, perform the
following step.
Selecting Input Impedance
Channel 1’s input impedance is now set to 50Ω.
NOTE The “arrow” keys can also be used to toggle the state of toggle keys (DC/AC,
50Ω/1MΩ, etc.) as indicated by the flashing indicator within the arrow keys. However,
for simplicity in this procedure, use the corresponding toggle key to change states.
Display 1, 7/13/92
DC
AC
DC
AC
50Ω
1MΩ