Tektronix DG2020A, User Manual

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Operating Basics
2Ć14
DG2020A, P3410, & P3420 User Manual
The sequence data is a program that specifies the order in which the pattern data
is output. The sequence data is used to set up operations such as iteratively
putting out blocks of pattern data for a specified number of times, and jumping
to a specified block when an external event occurs. Sequences allow long
patterns to be set up without preparing large quantities of data. Sequence data is
transferred to the pattern generation unit sequence memory, and specifies the
operation of the pattern control circuit. Using the run mode, which is described
in detail later, the you can select whether all the sequence data is valid or
whether enhanced mode settings such as event jumps in the sequence are
ignored.
Table 2-2 lists the data structure related technical terms that appear frequently in
the operating procedure descriptions. Figure 2-10 shows the usage of these terms
graphically.
Table 2Ć2: Data structure terms
Term Meaning
Pattern data Basic data for patterns, consisting of 36Ćbit words
Memory size The number of pattern data words (64 to 64K words)
Group allocation Definitions of pattern data bit combinations
Block delimiter Delimiterthat defines sections of pattern data
Block division Pattern data division by block delimiters
Pod allocation Definition of the correspondence relationship between pattern data
and output bits
Setup data Settings forthe above items
Sequence data Pattern output sequence program
Sequence Data
Technical Terms