Hioki MR8827, Instruction Manual

Page: 354 / 436

349
Common Functions
Trigger types
(analog)
•Level trigger
Triggering occurs at the signal rising (or falling) through a specified voltage level.
•Voltage Sag Trigger (Drop)
Triggering occurs when peak voltage falls below the specified level.
(for 50 Hz/60 Hz commercial power)
•Window trigger
Upper and lower trigger threshold levels are specified
Triggering occurs when the signal enters or exits the defined threshold range.
•Period trigger
A trigger period reference voltage level and period range are specified
The period of the signal rising (or falling) through the specified level is measured, and
triggering occurs when the period is outside of the specified range.
•Glitch trigger
Set voltage level and pulse width (glitch width)
Triggering occurs when the signal pulse width is narrower than the specified pulse width
beginning at the moment when rising or falling across a specified voltage level.
•Event trigger
Set the event count for the level trigger or glitch trigger.
The number of signal rising (or falling) through the specified voltage level is counted, and
triggering occurs when the specified event count is exceeded.
Trigger types (logic) Pattern (mask) trigger by 1, 0, × (×: do not care)
Trigger types
(external trigger)
External signal is used as trigger.
Trigger types
(timer trigger)
Triggering occurs at a preset time.
Trigger filter •Memory function, FFT function: Off, 0.1, 0.2, 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0 div
• Recorder function: Off/On (10 ms fixed)
Trigger level
resolution
0.1%f.s. (f.s. = 20 div)
Pre-trigger Applicable to memory function or FFT function
% setting: 0, 2, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 95, 100, −95%
div setting: 1 div increments
Trigger priority
Off/On
Trigger marker Trigger marks indicate positions of trigger events
Trigger timing Start (Memory function, FFT function),
Stop (Recorder function), Start & Stop (Recorder function)
Trigger search
function
After measurement, searches for positions that meet trigger criteria
Trigger output
Open-collector output
With 5 V voltage output, active low, low output level: 0 V to 0.5 V (current value of 15 mA)
Pulse width at level setting time: (sampling rate × number of data points after trigger) or
more
Pulse width at pulse setting time: 2 ms ± 1 ms
Trigger input and
output terminals
Terminal block
Level display
function
Included
Specifications
18