Tektronix DG2020A, Руководство пользователя

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DG2020A, P3410, & P3420 User Manual
3Ć59
. The maximum step size of the sequence, including sequence and subse-
quences, is 2048.
In enhanced mode the sequence program can jump to the line number set in the
Event Jump field in response to an event input from the pod when the output
reaches the end of the block in the block field. This is called the event jump
function.
The event jump function can be applied to any line in the sequence program with
the Make Sequence menu Set Enhanced Control
Event Jump menu item.
In enhanced mode, after the block data for a sequence program for which the
event jump function has been set has finished outputting, the DG2020A
determines whether to perform an event jump.
The fact that an event request occurred is stored in a flip-flop in the pattern
control circuit when either a low level to high level transition occurs in the pod
event input, or the front panel STEP/EVENT button is pressed.
Then, when the end of the output of the block in a line for which the Event
Jump item is set approaches, the DG2020A checks the state of that flip-flop,
activates the event jump operation, and clears the flip-flop. Keep it in mind that,
even in the trigger wait state and during the output of data for a block for which
the Event Jump item was set to off, a rising edge in the signal applied to the
event input is seen as an event request, and causes the next event jump operation
to occur.
The event jump operation occurs even if the block pattern has not been output
for the number of repeats set in the sequence program. When an event jump
operation occurs, a positive TTL-level pulse 8 clocks wide is output from the
front panel event output connector 22 clocks before the block pattern switches.
Event Jump Function