Timing Acquisition Mode Field (Timing Only) - HP 16550A User Reference

The Format Menu
Timing Acquisition Mode Field (Timing only)
Timing Acquisition Mode Field (Timing only)
The Timing Acquisition Mode field displays the acquisition type, the channel
width, and sampling speed of the present acquisition mode. The Timing
Acquisition Mode field is used to access an acquisition mode selection menu.
Conventional Acquisition Mode
In Conventional Acquisition mode the analyzer stores measurement data at
each sampling interval.
Conventional Full Channel 250MHz The total memory depth is 4096
with data being sampled and stored as often as every 4 ns.
Conventional Half Channel 500MHz The total memory depth of
8192 with data being sampled and stored as often as every 2 ns.
Glitch Acquisition Mode
In Glitch Acquisition mode, a glitch is defined as a pulse with a minimum
width of 3.5 ns and a
maximum
width of 8 ns, or the sample period,
whichever is larger. As an example, if the sample period is 8 ns, then a glitch
is defined as being between 3.5 ns and 8 ns. One advantage of the glitch
mode is that if you expand the sample rate, a pulse that is less than the
sample rate will still be displayed as a vertical dashed line.
Glitch Half Channel 125MHz The total memory depth is split
between data storage and glitch storage. Data acquisition memory depth
is 2048 per channel. Glitch storage is 2048 per channel. Data is sampled
for new transitions every 8 ns.
- -----~A~
GLITCH ANALYZER . .
INPUT
ANALYZER
DISPLAY
SAMPLE
t
POINTS
t
Glitch in a Timing Waveform
t
t
t
~
GLITCH DISPLAYED
ON NEXT SAMPLE
01650W09
4-5
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