GRAPHTEC GL820 - Page 68

3−32
CHAPTER 3 Settings and Measurement
Level and Edge operations
In the Level operation, a trigger is assumed to be generated if the trigger conditions are met
when the START key is pressed.
In the Edge operation, a trigger is not assumed to be generated even if the trigger conditions are
met when the START key is pressed.
A trigger is assumed to be generated when the trigger conditions, after not being met, are met
again.
* A trigger is still assumed to be generated even if the trigger conditions are met once in the
Edge operation and then are no longer met.
1CH
2CH
Measrement is started here.
Example: Rising Edge And for 1CH and 2CH
If the START key is pressed here
For 1CH, a trigger is assumed to
be generated here, too.
For 1CH, a trigger is
generated here.
For 2CH, a trigger
is generated here.
Measurement is
started from here in
the Edge operation.
Example: Rising
Tr igger generation area
An edge exceeding
the setting level is
required.
Setting
level
Measurement is
immediately
started in the
Level operation.
If the START key is pressed here
Trigger and Alarm operations
Rising : A trigger/alarm is generated when the input signal is higher than the specified level.
CH.1
Setting level
Tr igger (alarm) generation area
Measurement starts (alarm generated)
Falling : A trigger/alarm is generated when the input signal is lower than the specified level.
㪚㪟㪅㪈
Setting level
Tr igger (alarm) generation area
Measurement starts (alarm generated)
Win In : Used to specify the upper and lower limits for each channel. When the input signal
level comes (or is) between these limits, a trigger/alarm is generated.
CH.1
Lower limit level
Upper limit level
Tr igger (alarm) generation area
Measurement starts (alarm generated)
Win Out : Used to specify the upper and lower limits for each channel. When the input signal
level goes (or is) out of these limits, a trigger/alarm is generated.
CH.1
Lower limit level
Upper limit level
Tr igger (alarm) generation area
Measurement starts (alarm generated)