OWON MSO Series - Manual (Page 84)

79
Duration 10ns～50s
The duration width can be set from 10ns (1-2-5) to
10.00us (1-2-5) according to the sampling rate from
high to low.
Qualifier
>=
<=
Trigger occur on condition that the bus value is equal
to the code type and the duration is more than or
equal to the duration width.
Trigger occur on condition that the bus value is equal
to the code type and the duration is less than or equal
to the duration width.
For example: measure a 16 bit data bus signal, bus will appear data of "0X99" and
continuous time is 50ns. We set BUS0 to include 16 measurement channels and sample
rate as "100M", trigger setting as duration trigger. Setting steps as below:
A、Press "Trigger MENU" and menu appears.
B、Press "F1" till trigger mode display as "Data Width"
C、Press "F2" till signal resource display as "BUS0"
D、Press "F3" and data in code type as red background and green digital indicator on, then
insert data value "0X99". Press "F3" again and red background disappeared. Repeat
operation of step D if setting error or need to be modified,
E、Press "F4" and duration in menu setting window correspond to F4 display red
background. Turn "CH1 Volts/Div" knob and set duration as "50ns".
F、Press "F5" till qualifier display as ">="
G、Turn "Trigger level " adjust knob or press "set 50%"till trigger position display as
"NEXT T POS = 50%".
Then duration trigger setting finished (refer to
Fig.5-65 ) and ready for data acquisition.
Fig.5-65：Data width trigger
How to set threshold
Threshold setting is quite important because wrong setting will result in wrong