Specifications

User Manual 301/302
given in the following paragraphs.
Arbitrary Memory
Management
The arbitrary memory in comprised of a finite length of words. The
maximum size arbitrary waveform that can be loaded into memory
depends on the option that is installed in your instrument. The various
options are listed in Chapter 1 of this manual. If you purchased the
Model 301/302 with in its basic configuration, you should expect to
have 4 Meg to save waveforms.
Waveforms are created using small sections of the arbitrary memory.
The memory can be partitioned into smaller segments (up to 4096)
and different waveforms can be loaded into each segment, each
having a unique length. Minimum segment size is 16 points, as long
as its playback time is more than 10 µs. Information on how to
partition the memory is given in the following paragraphs.
Memory
Management
Commands
Arbitrary memory can be divided into smaller segments; up to 4096
different arbitrary waveforms can be stored in the Model 301/302’s
memory. The length of each segment and its associated sample clock
rate are left to the user’s discretion. To partition the arbitrary waveform
memory, use the following command:
TRACe:DEFine <segment_number>,<length>
Note that numbers, not names, are assigned to segments. Segment
numbers can range from 1 through 4096. The order of assignment is
not important as long as segment size does not change after they
have already been defined.
Note
Minimum segment length is 16 points. Segment size may be set
from 16 points to the maximum memory size, in increments of 8
points. A size of 1002 is not a valid segment length since it is not
evenly divisible by 8. An error will occur if 1002 points is assigned
to a segment.
You cannot query the TRAC:DEF command so you must keep good
track if you intend to partition the memory into many segments. If a
mistake is made and removal of one or more segments from the
active directory is needed, use the following:
TRACe:DELete <n>
where <n> is the segment number to be removed from memory. Note
that if a segment is deleted, the memory portion that belonged to this
segment is no longer accessible. The next segment that is defined will
be placed after the last defined memory segment. However, if the last
Configuring The Instrument
44