RIGOL 
  
  Service Guide for DM3000 Series 
 
current is typical. 
Variation in the current source will create some variation in the voltage drop across a diode 
junction. 
 
Settling Considerations   
Reading settling times are affected by source impedance, cable dielectric characteristics, and input 
signal changes. Typically, settling time is 1.5s when source impedance less than 1kΩ.