Keysight Technologies L4490A, Руководство пользователя

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Keysight L4490A/L4491A User’s Guide 117
Introduction to Programming
Sequence Programming
A programming sequence is a set of commands that provide direct control (open,
close, delay) of switches and attenuators. The advantages of using programming
sequences are:
- a sequence can be given a descriptive name indicating its function or the
signal path it is controlling
- programming speed is increased (IO - input/output transactions decreased)
- channel operations (delay/open/close) occur precisely and in the channel list
order specified
A programming sequence can be defined using the Sequences window opened
with the
Sequences...
button on the ‘Browser Web Control’ page (Figure 4-2). The
Sequences window is shown in Figure 4-16.
Defining a Sequence
Sequences are defined by a sequence name, trigger source, and definition (the
commands within the sequence). The commands allowed within a sequence are
listed in the ‘Sequence Commands’ drop-down box and include:
ROUTe:CLOSe (@<ch_list>)
ROUTe:OPEN (@<ch_list>)
ROUTe:MODule:WAIT <slot>|ALL
ROUTe:SEQuence:TRIGger[:IMMediate] <sequence_name>
SYSTem:DELay[:IMMediate] <time_in_seconds>
ABORt
Additional guidelines when using sequences include:
1 Sequences are stored in the non-volatile memory of the 34945EXT.
2 Up to 500 sequences can be stored; each sequence must be < 1024 bytes.
3 Sequences can be nested (one sequence can start another).
4 Sequences are not deleted with
SYSTem:RMODule:RESet
5 Renaming a sequence creates a new sequence by that name.
6 Defined sequences can be logged for transfer to other programming
environments (see “An Overview of the ‘Browser Web Control’ Page”).