HP 54710A User's Reference Manual page 392

Glossary
Acquisition The process of
sampling and digitizing
instantaneous values of a continuous
analog waveform and storing the
values in memory.
Acquisition system A
combination of hardware and
firmware that performs the
acquisition process and assembles
individual waveform samples into
coherent waveform records.
Averaging Before updating the
display or measurements, the
oscilloscope averages newly
acquired data with existing data.
The higher the number of averages,
the less impact each new waveform
has on the composite averaged
waveform. Averaging is typically
used to eliminate random noise from
a repetitive waveform.
Best accuracy calibration
A second level calibration that is
performed after a normal level
calibration. This procedure
calibrates the combination of the
plug-in and the mainframe slot in
which it resides as a single channel.
The best accuracy calibration
ensures that the highest level of
measurement accuracy is achieved.
For best measurement results, you
should perform a best accuracy
calibration before just prior to
making critical measurements. See
chapter 5, "Calibration Overview,"
for additional details about the
calibration levels of the oscilloscope.
Bit map A two-dimensional array
in which each element stores the
state of a corresponding pixel (dot)
on a video display. Typically, there
is one bit in the array for each pixel
on the display. The bit indicates
whether the pixel is illuminated (1)
or off (0).
Connected dots A straight line is
drawn between two-adjacent data
points on the display. Connected
dots is a display feature; it has no
affect on the waveform record stored
in memory.
Delay-by-events triggering The
trigger circuitry arms on an edge
from one of the channel or trigger
inputs, waits for a number of events,
then triggers on an edge from any of
the channel or trigger inputs.
Basically, it is two edge triggers
separated by a selectable number of
events.
Delay-by-time triggering The
trigger circuitry arms on an edge
from one of the channel or trigger
inputs, waits for a time period, then
triggers on an edge from any of the
channel or trigger inputs. Basically,
it is two edge triggers separated by a
selectable time period.
Glossary-1