User manual

31
UNI-T
®
UT4000 User Manual
Table 2-11 (Con’t)
Trigger mode Normal
Single
The system stops acquiring data when there is no
trigger signal. When the trigger signal is
generated, trigger scan occurs.
One trigger will occur when there is an input
trigger signal. Then trigger will stop.
Slew rate setup Slew rate type
Slew rate of the
slew condition
Threshold
Return
Rise/fall setup.
Set slew rate to : larger than/smaller
than/equalling to with the multifunction control
knob on the front panel.
Low level/high level/High low level setup.
Return to the previous menu.
LA Trigger
First enable the LA function, then select LA trigger. Trigger menu is as follows :
Table 2-12
Function Menu Setup Explanatory Note
Type LA Select LA trigger as the trigger type.
Sub-type Pattern
Duration
Select pattern or duration as the sub-type.
Trigger qualifier
⎯
Turn the multifunction control knob and [SELECT]
key to set the high and low levels for each of the
16-width values.
Trigger mode Auto
Normal
Single
The system automatically acquires waveform data
when there is no trigger signal input. The scan
b
aseline is shown on the display. When the trigger
signal is generated, it automatically turns to trigger
scan.
The system stops acquiring data when there is no
trigger signal. When the trigger signal is generated,
trigger scan occurs.
One trigger will occur when there is an input trigger
signal. Then trigger will stop.
Duration setup Condition
Time setup
Select above, below or equivalent.
Set a duration that satisfies the “condition” with the
multifunction control knob.
Clock setup Clock source
Clock edge
Select the source with the multifunction control
knob.
Select the rising or falling edge of the clock.
Back
⎯
Return to the previous menu level.
Alternate Trigger
When alternate trigger is selected, the trigger signal will be present in two vertical
channels. This triggering mode is suitable for observing two signals of unrelated signal
frequencies. The Alternate trigger menu can also be used to compare pulse widths.