High Speed Sequence Downloads (3151A Only) - Racal Instruments 3151 User Manual

3151 And 3151A User Manual
High Speed
Sequence
Downloads (3151A
Only)
Note: The high speed feature described in this section is not
available with the Model 3151, it is available for the 3151A only.
In cases where large numbers of sequence steps must be
downloaded to the 3151A (e.g., >50), for higher overall
throughput (e.g., 5x-10x improvement) it is recommended that
SEQ:DATA be used instead of a series of SEQ:DEF commands
(described in the above section). The SEQ:DATA command
takes the place of a series of SEQ:DEF commands by packing all
relevent data into a IEEE-STD-488.2 Definite Length Arbitrary
Block Data Format packet.
The format of the command is:
SEQuence:DATA#<header><binary data>
and the header structure is:
Nnnnn
where N = how many digits follow within the header and nnnn is
a decimal number (base 10) defining how many bytes of binary
data will follow. The header is formatted in ASCII numbers. The
number of bytes must be a multiple of 5. Each 5 bytes define one
step and its associated looping.
Header examples:
41000 (1000 bytes in binary format to follow)
510000 (10000 bytes in binary format to follow)
The byte structure of one 5-byte step (there can be up to 4096
steps) of the Binary Data section is:
2 bytes:
Segment #
3 bytes:
Number of Repeats
Using The Instrument 3-35