Hioki MR8740, Инструкция по эксплуатации

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17.3 Trigger Section
344
Averaging Time axis, simple average of frequency axis, indexed average, peak hold (frequency axis),
number of times (2, 4, 8, ... 10,000)
Automatic print Automatically prints data after measurement (Sends print data to PC connected via LAN,
Model 9333 LAN communicator is required.)
Manual print The "Send Print Key" function of Model 9333 LAN communicator is utilized
Report print The "Send Print Key" function of Model 9333 LAN communicator is utilized
17.3 Trigger Section
Trigger method Digital comparison
Trigger modes • Single, Repeat, Automatic (Memory function, FFT function)
• Single, Repeat (Recorder function)
Trigger source MR8740: Block I Analog Unit (Ch1 to Ch32), 8 Standard Logic Channels
Block II Analog Unit (Ch1 to Ch22), 8 Standard Logic Channels
MR8741: Analog Unit (Ch1 to Ch16), 16 Standard Logic Channels
Independent trigger criteria settable for each channel
Free-run operation occurs when all trigger types are off.
Manual trigger Trigger operated by the manual trigger key of the Memory HiCorder
Timer trigger Trigger depending on the time and interval settings
External trigger (MR8741 only) External signal is used as trigger.
Trigger criteria AND or OR of each trigger source
Trigger types (analog) • Level Trigger
Set digitally as a voltage value below full-scale
• Voltage Sag Trigger (Drop)
Triggering occurs when peak voltage falls below the specified level (for commercial power).
(for 50/60 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 defined
as rising (or falling) through a specified voltage level.
• Event Trigger
Triggering occurs when the event values specified for the level or glitch trigger are exceeded.
Triggering occurs when the input rises above (or falls below) the specified trigger voltage level.
Trigger types (logic) Pattern (mask) trigger by 1, 0, or x (x: don't care)
External trigger
(MR8741 only) External signal is used as trigger.
Trigger filter OFF, 0.1, 0.2, 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0 div (Memory function, FFT function)
OFF, ON: 10 ms fixed (Recorder function)
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: Setting by units of 1 div
Trigger priority Off/On
Trigger synchronization
(MR8740) Synchronization between block I and block II (by using external trigger)
Offset between blocks of the larger value of 1 µs or 3 samples or less
Trigger marker Trigger marks indicate positions of trigger events
Trigger timing Start (All functions), stop (Recorder function), Start & stop (Recorder function)
Trigger Output
(MR8741 only) Open collector output
With 5 V voltage output, active low, low output level 0 V to 0.5 V (current of 15 mA)
Pulse width for level setting: (sampling rate × number of data points after trigger) or more
Pulse width for pulse setting: 2 ms±1 ms