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(2) Idle Time
Compare the idle time with pulse time, it will be triggered when the condition is met. The range can
be set 8ns ~ 10s.
(3) Edge Value
The edge value is triggered at the edge of the pulse string. The edge value can be set by using
multipurpose knob, shuttle knob and numeric keypad. The edge value range can be set 1 to 65535.
7.13 Pattern Trigger
The pattern trigger identifies the trigger condition by looking for the specified patterns. The pattern trigger
type is the combination of the channel logic "AND", each channel can be set to H (high), L (low), X
(ignored). You can also specify a channel in the type as a rising edge or falling edge (only one edge can
be specified). When the edge is assigned, if the pattern of the other channels are judged "true" (i.e., the
actual code is consistent with the preset code type), the oscilloscope will trigger on the specified edge. If
the edge is not assigned, the oscilloscope will trigger at the last edge of the code type "true". If the pattern
of all channels are set to "ignore", the oscilloscope will not be triggered.
(1) Pattern
There are H, L, X, rising edge, or falling edge. The pattern setting of each channel is displayed at the
bottom of the screen.
a. H：Set the pattern value of the selected channel to “High”, that is, the voltage level is higher
than the trigger level of the channel.
b. L：Set the pattern value of the selected channel to “Low”, that is, the voltage level is lower than
the trigger level of the channel.
c. X：Set the pattern value of the selected channel to “Ignored”, that is, the channel is not part of
the pattern. The oscilloscope will not be triggered if all channels in the pattern are set to “ignored”.
d. Rising edge: Set the pattern to the rising edge of the selected channel.
e. Falling edge: Set the pattern to the falling edge of the selected channel.
7.14 RS232 Trigger
RS232 interface is an asynchronous transmission standard interface developed by the Electronics
Industry Association. It is usually available in DB-9 or DB-25 applications. It is suitable for communication
with data transmission rate in the range of 0~25000000b/s and is widely used in microcomputer
communication interface. The data to be sent is combined into a specific set of serial bits according to
the protocol rules and sent in an asynchronous serial.
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