MR8740、MR8741_user_manual_eng_20191016H.pdf - 第213页
8.5 Trigger by Timer or Time Intervals (Timer Trigger) 201 7 Chapter 8 T rigger Settings 8 When a trigger is applied from a t rigger source other than a timer trigger T rigger sour ces set to On are all e nabled. However…
8.5 Trigger by Timer or Time Intervals (Timer Trigger)
200
Description About start and stop times
• Start and Stop times should be set as times elapsed since the measurement
was started.
• When the trigger mode is [Single] and the timer trigger is [On], only one timer
trigger specified as the Start trigger is recognized. Interval and Stop time trig-
gers are ignored.
To record an interval with specified Start and Stop times
Set the trigger mode to [Repeat], and set all other trigger sources [Off].
However, triggering is disabled during processing (auto save, waveform display
processing and calculation) from the end of recording to the next Trigger Wait
state, so depending on measurement settings, recording may not occur within
the specified interval.
About Stop Time and Recording Length
The stop time is function-dependent:
Memory function: Measurement data is acquired for the specified recording
length, then recording stops.
Recorder function: Measurement data continues to be acquired until the speci-
fied Stop time.
Recording
Length
Recorder Function
Memory Function
Recording stops at Stop Time
Recording stops after
Recording Length
TT
Stop Time
Interval
Recording stops after
Recording Length
Relationship Between Last Recording Length and Stop
Time
8.5 Trigger by Timer or Time Intervals (Timer Trigger)
201
7
Chapter 8 Trigger Settings
8
When a trigger is applied from a trigger source other than a timer trigger
Trigger sources set to On are all enabled.
However, trigger timing depends on the trigger source settings.
• When trigger criteria are ORed together (Trigger Source: OR)
Depending on the other trigger sources, triggering can occur before the speci-
fied trigger Start time, after the specified Stop time, or outside of the specified
Interval.
• When trigger criteria are ANDed together (Trigger Source: AND)
Triggering occurs between the specified Start and Stop times when criteria for
all trigger sources set within the specified interval are satisfied.
If the interval is set to zero, triggering occurs when criteria for all trigger
sources set between specified Start and Stop times are satisfied.
Example: measuring when both timer trigger and level triggers (Slope:
) are
enabled.
When trigger criteria are ORed together (Trigger Source: OR)
Start Measurement
Start Time Stop Time
Level Trigger
Timer Trigger
Recording
T T T T T T T T T T
Interval
Ignored because they occur while recording
When trigger criteria are ANDed together (Trigger Source: AND)
Start Measurement
Start Time
Stop Time
Recording
T
Interval
T T
Outside of Timer Time
Timer Trigger is not
applied, so ignored
Trigger was applied only once
within the interval, so ignored
Outside of
Timer Time
Measurement ends
at Stop time
Level Trigger
Timer Trigger
Ignored because they occur while recording
8.6 Synchronizing Between Blocks (MR8740 Only)
202
The input signal from another block can be used as a trigger source.
Use this to synchronize between block I and block II of MR8740 Memory HiCorder.
8.6 Synchronizing Between Blocks
(MR8740 Only)
Procedure
To open the screen: Right-click and select [DISP] Waveform screen Right-click and select [TRIG.SET]
Trigger settings window
1
Enable synchronization between blocks.
Move the flashing cursor to the [Sync blocks] item.
Select
Off Synchronization between blocks is not performed.
(default setting)
On
Synchronization between blocks is performed.
• To synchronize block I and block II, trigger synchronization needs to be set for
both blocks.
• The sampling offset between blocks is within 3 samples or 1 us.
If the sampling differs between both blocks, the offset will be for the slow sam-
pling side.
• Synchronizing between blocks of the U8793, MR8790, or MR8791 cannot be
enabled.