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Chapter 6 Useful Functions
External trigger input/output
You can use an abnormal signal from an external device as a trigger input, or can detect the occurrence of a spe-
cial factor on the communication line by this analyzer and notify it to an external measuring instrument such as
an oscilloscope.
The TRG IN terminal can be specified as the line state condition of the trigger factor.
TRG OT1 terminal outputs L pulse for about 1 ms when all trigger factors are satisfied.
TRG OT2 terminal outputs L pulse for about 1 ms when OT2 operation is specified as a trigger factor.
The trigger terminal is pulled up to 5V inside the analyzer.
When a new trigger is generated while the trigger pulse is being output, it goes to HIGH level about 1 ms after the last
trigger is generated.
TTL port
H(+5V)
L(GND)
About 1milli sec
About 1milli sec
Trigger generated
6.1 Trigger Function
The trigger function is a function that triggers a special measurement process (action) triggered by a spe-
cific condition (factor) such as the occurrence of a communication error during measurement operation or
reception of specified data. By controlling the timer/counter, it can measure the communication response
time and count the number of occurrences of specific events. This is useful when analyzing the flow of
communication under the specific interest.
The trigger function is valid only in the online mode of the monitor function and MANUAL mode of the simulation
function.
The condition of the trigger factor is also used as the execution condition of the statistical analysis function and the
PROGRAM mode (of the simulation function).
[
Factor
]
Error
Communication error, break, multiprocessor bit on
Character
Communication data of up to 8 characters
Line state
Logic state of interface signal line and external trigger input
Timer/Counter
Timer/Counter value match
Idle time
Idle time exceeding the specified time
[
Action
]
Buzzer
Buzzer sound
Stop measurement
Stops the measurement/test (offset number until stop can be specified.)
Save data
Save data before and after the trigger to the storage device
Timer control
Start/stop/restart of the timer 0/1 for trigger
Counter control
Count up/clear of the counter 0/1 for trigger
Trigger control
Enables/disables/inverts the state of trigger condition
Transmit data
Transmits the specified character string (during manual simulation)
OT2 pulse output
Outputs an L pulse of about 1 msec. to external trigger terminal OT2
