From Manufacturer's User Manual:
The HP 16550A State/Timing Analyzer module is part of a new
generation of general-purpose logic analyzers. The HP 16550A
module is used with the HP 16500B/C mainframe, which is designed
as a stand-alone instrument for use by digital and microprocessor
hardware and software designers. The HP 16500B/C mainframe has
HP-IB and RS-232-C interfaces for hard copy printouts and control by
a host computer.
The HP 16550A State/Timing Analyzer module has 96 data channels,
and six clock/data channels. A second HP 16550A card can be added
to expand the module to 204 data and clock/data channels.
Memory depth is 4 Kbytes in all pod pair groupings, or 8 Kbytes on
just one pod (half channels). All resource terms can be assigned to
either configured analyzer machine.
Measurement data is displayed as data listings or waveforms, and can
be plotted on a chart or compared to a reference image.
The 100-MHz state analyzer has master, slave, and demultiplexed
clocking modes available. Measurement data can be stamped with
either state or time tags. For triggering and data storage, the state
analyzer uses 12 sequence levels with two-way branching, 10 pattern
resource terms, 2 range terms, and 2 timers/counters.
The 500-MHz timing analyzer has conventional, transitional, and glitch
timing modes with variable width, depth, and speed selections.
Sequential triggering uses 10 sequence levels with two-way branching,
10 pattern resource terms, 2 range terms, 2 timers/counters and 2
Defining a trigger specification is as easy as picking a predefined
macro from a trigger macro library. Trigger macros can be used by
themselves or in combination with each other.