HP 54710A - Page 397

Throughput
Throughput is the
rate at which the oscilloscope can
acquire, display, and make
measurements on a waveform. The
faster the throughput of an
oscilloscope, the more waveforms
per second that it can process.
Time base reference
A reference
point along the time axis (X axis) of
the waveform. On the HP 54720,
this point can be either the left side
of the display, the center, or the
right side. The time of this point,
relative to the trigger event, is set
using the time base position control.
When the time base scale is
changed, the time location at the
time base reference remains fixed
and the waveform display either
expands or contracts about the
reference point. This point is
identified by a small up arrow icon in
the graticule frame below the
waveform display area.
Time bucket
A storage location
within a waveform record which is
used to hold a waveform data
sample. A waveform record is made
up of a series of waveform data
samples stored in ascending time
order. Each waveform sample is
stored in a specific time bucket
within the waveform record based
upon its time relationship to the
other samples. The waveform
record length (number of points)
determines the number of time
buckets in a record. A time bucket
is considered "full" if it contains a
waveform data sample.
Trigger event
A change of some
type in the trigger source waveform
which causes the acquisition system
to begin storing waveform samples
into the waveform records. The time
at which the trigger event occurs is
the time reference for the waveform
and is, by definition, 0 seconds.
Waveform memory
A waveform
memory is a convenient, nonvolatile,
waveform storage area. A waveform
memory contains a single waveform
record along with the vertical and
horizontal scaling factors for that
waveform.
Windowing
1) The term used to refer to the
setting up of the waveform display
using the time base and vertical
controls in order to specify a portion
of a waveform to be measured or
analyzed.
2) A feature in the time base menu
which allows you to use an
intensified marker to select a
subsection of the waveform on the
screen for magnification and
additional analysis.
Glossary
Glossary-6