HP 1650B Programming Reference Manual page 85

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Acquisition Data
Description
HP 1650B/HP 16518
Programming Reference
5 bytes - Demultiplexing (state only) - For each of the five pods (first byte
is POD 5, f&h byte is POD 1) in a state machine, describes multiplexing
of each of the five pods. (0 = NO DEMUX, 1 = TRUE DEMUX, 2 =
MIXED CLOCKS).
1 byte - Reserved
20 bytes - Trace point adjustment for pods - Each pod uses 4 bytes to
show the number of nanoseconds that are to be subtracted from the trace
point described above to get the actual trace point value. The first 4 bytes
are for Pod 5, the next four are for Pod 4, and so on.
10 bytes - Reserved
The next 78 bytes are for Analyzer 2 Data Information. They are
organized in the same manner as Analyzer 1 above, but they occupy bytes
The acquisition data section consists of 14336 bytes (1024 1Cbyte groups),
appearing in bytes 177 through 14512. The last ten bytes (145l.3 through
14522) are reserved. The data contained in the data section wiII appear in
one of four forms depending on the mode in which it was acquired (as
indicated in byte 21 for machine 1 and byte 99 for machine 2). The four
modes are:
State Data (without tags)
l
State Data (with either time or state tags)
l
Glitch Timing Data
l
l Transitional Timing Data
The following four sections describe the four data modes that may be
encountered. Each section describes the Status bytes (shown under the
Machine 1 and Machine 2 headings), and the Information bytes (shown
under the Pod 5 through Pod 1 headings).
DATA
System Commands
611