HP 16554A Programmer's Manual page 291

<block data> <block length specifier><section>...
<block length #8<length>
specifier
the total length of all sections in byte format (must be represented with 8
<length>
digits)
<section> <section header><section data>
16 bytes, described on the following page
<section
header>
format depends on the type of data
<section data>
The total length of a section is 16 (for the section header) plus the length of the
section data. So when calculating the value for
include the length of the section headers.
Query
:SYSTem:DATA?
The SYSTem:DATA query sends block data to the controller. The data sent
by the SYSTem:DATA query reflect the configuration of the machines when
the last run was performed. Any changes made since then through either
front-panel operations or programming commands do not affect the stored
configuration. The format of the block data depends on the current setting of
the DBLock parameter.
Returned Format
[:SYSTem:DATA] <block data><NL>
See Also
The DBLock command description in chapter 2, "Module Level Commands."
DATA and SETup Commands
SYSTem:DATA
, don't forget to
<length>
17–5