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Note d
17
19
Note d
21
22
HP 16528/1663B
Programming Reference
One analyzer's information is independent of the other analyzer's
information. In other words, on any given line, one analyzer may contain
data information for a timing machine, while the other analyzer may
contain count information for a state machine with time tags enabled. The
status bytes for each analyzer describe what the information for that line
contains. Therefore, when describing the different formats that data may
contain below, keep in mind that this format pertains only to those pods
that are assigned to the analyzer of the specified type. The other analyzer's
data is TOTALLY independent and conforms to its own format.
The preamble (bytes 17 through 176) consists of the following 160 bytes:
2 bytes - Instrument ID (always 1652 for HP 1652B and HP 1653B)
2
bytes - Revision Code
The values stored in the preamble represent the captured data currently
stored in this structure and not what the current configuration of the
analyzer is. For example, the mode of the data (bytes 21 and 99) may be
STATE with tagging, while the current setup of the analyzer is TIMING.
The next 78 bytes are for Analyzer 1 Data Information.
1 byte - Machine data mode, one of the following values:
0 = off
1 = state data (with either time or state tags)
2 = state data (without tags)
3 = glitch timing data
4 = transitional timing data
1 byte - List of pods in this analyzer, where a 1 indicates that the
corresponding pod is assigned to this analyzer.
bit 8
bit 7
bit 6
unused
u n u s e d
P o d 1
bit 5
bit 4
bit 3
P o d 2
Pod 3
Pod 4
System Commands
DATA
bit 2
bit 1
Pod 5
unused
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