HP 16550A User Reference page 245

100-mhz state/500-mhz timing logic analyzer
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Specifications and Characteristics
Characteristics
Measurement and Display Functions
Arming Each module can be armed by the RUN key, external PORT IN,
or by another module via the Intermodule Bus (IMB).
Displayed Waveforms 24 lines maximum, with scrolling across 96
waveforms.
Measurement Functions
Run/Stop Functions Run Starts acquisition of data in specified trace
mode.
Stop In single trace mode or the first run of a repetitive acquisition,
STOP halts acquisition and displays the current acquisition data. For
subsequent runs in repetitive mode, STOP halts acquisition of data and
does not change current display.
Trace Mode Single mode acquires data once per trace specification.
Repetitive mode repeats single mode acquisitions until stop is pressed or
until time interval between two specified patterns is less than or greater
than a specified value, or within or not within a specified range.
Indicators
Activity Indicators Provided in the Configuration and Format menus
for identifying
high,
low, or changing states on the inputs.
Markers Two markers (X and 0) are shown as dashed lines on the
display.
Trigger Displayed as a vertical dashed line
in
the Timing Waveform
display and a line 0 in the State Listing display.
12-6

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