Hioki 8841 - Trigger Unit

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18.3 Trigger Unit
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16
17
18
19
5
6
7
8
9
10
11
12
13
14
A
Trigger Method
Digital comparison
Trigger modes
Memory recorder, FFT Single, repeat, auto
Recorder, RMS recorder Single, repeat
Recorder&Memory Single, repeat, timer
Trigger source
CH1 to CH16, logic CHA to CHD
･
External trigger (With an external trigger, the triggering occurs on a falling
edge of 2.5 V, or when the terminals are shorted together.)
･
Manual trigger
･
Timer trigger
･
Sources can be set on or off. When all sources are off, the unit is in the
free-run state.
Trigger conditions can be set for each channel individually.
Trigger conditions
Logical AND or OR of any trigger sources
Trigger types (analog)
(1) Level trigger
･
Digital setting of voltage values for full scale
･
Triggering occurs at rising edge (falling edge) of set value.
(2) Window-in, window-out trigger
･
Upper and lower trigger levels can be set.
･
Triggering occurs when the waveform enters or leaves the defined area.
(3) Voltage drop trigger (for commercial power supplies)
･
Triggering occurs when the peak of the voltage falls lower than the setting
level.
(4) RMS level trigger (for commercial power supplies and DC)
･
Set the RMS value by digital value.
･
Triggering occurs at rising edge (falling edge) of set value .
(5) Period trigger
･
This function sets both the period reference voltage and the period range,
and measures the rise (fall) period of the set voltage.
･
When the measured period deviates from the specified range, triggering
occurs.
Trigger type (logic)
Pattern trigger specified by 1, 0, and
×
(
×
means that either 1 or 0 is fine.)
Trigger filter
MEM, memory waveform in REC&MEM, FFT:
OFF, 0.1, 0.2, 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0 DIV
REC: ON, OFF
（
10 ms fixed
）
Trigger level resolution
0.25%f.s.
（
f.s.
＝
20 DIV
）
Pre-trigger
MEM, memory waveform in REC&MEM, FFT:
0, 2, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 95, 100, -95 %
RMS: 0, 5, 10 DIV
Trigger timing
Start, Stop, Start and Stop (REC)
Trigger output
Open collector output (with 5 V output voltage, active low)
Pulse width 1 ms min.
Level meter function
When waiting for trigger, the level of the analog input signal is displayed on
the Waveform display screen.
18.3 Trigger Unit