Hioki MR8740, Instruction Manual

Page: 202 / 424

8.3 Triggering by Analog Signals
190
3. Voltage Sag Trigger ( only) _____________________________
Triggering occurs when the voltage peak drops below a preset level for more
than half a cycle. The allowable time axis range is 20
μ s - 50 ms/div.
4. In-Period Trigger, Out-of-Period Trigger__________________________
The rising edge and falling edge cycle of the reference voltage is measured, and
triggering occurs when the cycle enters the preset range (In) or leaves the preset
range (Out).
See: "Description" (p.192)
*1:
Changes in sync with the time axis range.
Type Parameters
[VDrop]
[L] (Level) Sets the level (voltage value) for the trigger. (The setting
can be made in 1/50 increments.)
[f=] (Frequency) Select 50 or 60 Hz.
RMS:
(actual value) It is an aim of the actual value. Changes in sync with the
level setting.
T
1/2 Period
Trigger Level
Type Parameters
[Per.I]
or
[Per.O]
[L] (Level) Sets the level (voltage value) for the trigger. (The setting
can be made in 1/50 increments.)
[S] (Slope) Determines whether triggering occurs when the signal
crosses the threshold (trigger level) on the upslope (ris-
ing edge) or on the downslope (falling edge). (
↑, ↓ )
[P
↓
]
(Period lower
limit)
*1
Available settings are 0 and more than 5 times the sam-
pling frequency. Settings higher than the upper limit val-
ue are not accepted. (When the setting is 0, the lower
limit is disregarded, and triggering occurs only on the
upper limit.)
[ ↑ ]
(Period upper
limit)
*1
The setting range extends to 20,000 times the sampling
frequency. Lower settings than the lower limit value are
not accepted.
[F] (Filter) Triggering occurs when the trigger criteria are met with-
in the specified filter width. This is useful to prevent spu-
rious triggering due to noise. (
: Off, 0.1 -
10 div)
Within Period
Range
Out of Period Range
T
Reference
Voltage Level
Period Upper Limit
Period Upper Threshold
Period Lower Limit
About the Trigger Point
The trigger point occurs one sam-
ple after the criterion is met.