HP HP 54600B, User'S And Service Manual

Page: 168 / 183

Glossary
This glossary is organized into
two parts: oscilloscope and
TV/video trigger terms. The
TV/video trigger terms apply to the
HP 54602B with Option 005
installed.
Oscilloscope Terms
Auto A trigger mode that pro-
duces a baseline display if the trigger
conditions are not met. If the trigger
frequency is less than 25 Hz, even if
the level and slope conditions are
met, a free running display will re-
sult.
Auto Level The oscilloscope sets
the trigger point to the 50% ampli-
tude point on the displayed
waveform. If there is no signal pre-
sent, a baseline is displayed.
Autoscale Front-panel key that
automatically sets up the oscillo-
scope to display a signal.
Autostore displays the stored
waveforms in half bright, and the
most recent trace is displayed in full
bright.
Baseline Free running trace on
the display when no signal is applied
and the trigger mode is set to auto or
auto level.
BW Lim (Bandwidth Limit) Limits
the displayed bandwidth of the se-
lected channel to 20 MHz, and is
available for channels 1 and 2 only.
This feature is useful for viewing
noisy signals
Couplng (Coupling) For the chan-
nels, it changes the input coupling.
Channels 1 and 2 allow dc, ac, or
ground, while channels 3 and 4 allow
dc or ground. In the trigger menu, it
toggles between dc and ac for trigger
coupling.
Cursors
Horizontal and vertical
markers used for making custom volt-
age and time measurements.
Delay In main sweep, the delay
knob moves the sweep horizontally,
and indicates how far the time refer-
ence is from the trigger point. In
delayed sweep the delay knob moves
the starting point of the portion of
the main sweep to be expanded by
the delayed sweep.
Delayed Gives an expanded view
of the main sweep.
Display Allows selection of either
normal, peak detect, or averaged dis-
play modes.
Erase Clears the display.
Glossary–1