Specifications 
DSO4000 Series Digital Storage Oscilloscope     72 
Less than: The oscilloscope triggers when the waveform slope is less 
than the set slope. 
Greater  than:  The  oscilloscope  triggers  when  the  waveform  slope  is 
greater than the set slope. 
Selectable from 20ns to 10s 
The leading edge: Rising edge or Falling edge; Time Setting: 20-10s 
 
Internal Trigger: Edge, Pulse Width, Video, Slope 
Internal Trigger: Edge, Pulse Width, Video, Slope 
 
Trigger Frequency 
Counter 
±30ppm (including all frequency reference errors and ± 1  count errors) 
AC coupled, from 4Hz minimum to rated bandwidth 
Pulse Width or Edge Trigger modes: all available trigger sources 
The Frequency Counter measures trigger source at all times, including 
when  the  oscilloscope  acquisition  pauses  due  to  changes  in  the  run 
status, or acquisition of a single shot event has completed. 
Pulse Width Trigger mode: The oscilloscope counts pulses of significant 
magnitude inside the 1s measurement window that qualify as triggerable 
events, such as narrow pulses in a PWM pulse train if set to < mode and 
the width is set to a relatively small time. 
Edge  Trigger  mode:  The  oscilloscope  counts  all  edges  of  sufficient 
magnitude and correct polarity. 
Video Trigger mode: The Frequency Counter does not work. 
Acquisition 
Normal, Peak Detect, and Average 
Acquisition Rate, 
typical 
Up  to  2000  waveforms  per  second  per  channel  (Normal  acquisition 
mode, no measurement) 
Upon single acquisition on all channels 
simultaneously 
After N acquisitions on all channels simultaneously, 
N can be set to 4, 8, 16, 32, 64 or 128 
Inputs 
Input Impedance, 
DC coupled 
1MΩ±2% in parallel with 20pF±3pF