User Manual

CHAPTER 6. WAVEFORM DISPLAY FUNCTION 29
Mode trigger mode
Slope trigger slope
6.1.1 External trigger input (Ext)
When the trigger source is set as Ext, input the trigger signal into the external signal input interface
(Synchronous) of the rear panel according to the following specications.
Projects Specication
Interface type BNC interface
Input level TTL
Minimum pulse width 1µs
Trigger delay time Within (1µs + 3 sampling cycles)
NOTE: When the voltage higher than 0-3.3V is applied on the external signal input interface (Synchronous),
the instrument may be damaged.
Minimum pulse width refers to the width of the high or low trigger level, at least 1µs.
Trigger delay time refers to the delay between the appearance of the trigger level and the response of CPU,
within (1µs + 3 sampling cycles).