HP 54620A, User'S And Service Manual

Page: 220 / 243

Duration is the time or signal
width measured using advanced trig-
ger. In an advanced trigger, you can
set the minimum duration by press-
ing a softkey.
Duration trigger operators in
advanced trigger, allow you to spec-
ify a duration on which the analyzer
should trigger. Duration greater-than
and less-than operators are available,
and are valid when only pattern
terms are involved, and are not se-
lectable when any edge terms are
selected as a source.
Duty cycle can be measured using
single-channel measurements. The
analyzer measures the period and
positive width, and then calculates
the duty cycle by dividing the period
into the pulse width and multiplying
the result by 100%.
Edge trigger is a single rising or
falling edge (or either) that must be
recognized on an input channel to
satisfy the trigger condition.
End channel is the channel for
which you want to measure delay
time.
Entered trigger operator is
used in the advanced trigger and in
the regular pattern trigger. “En-
tered” means that the trigger
qualifier is satisfied as soon as the in-
put waveforms have transitioned
from a state that does not match the
pattern to a state that does match
the pattern.
Erase clears the current display
and acquisition memory.
Exited trigger operator is used
in the advanced trigger. The trigger
qualifier is satisfied when the input
waveforms transition out of a state
that matches the pattern to a state
that does not match the pattern.
External trigger input allows
you to trigger the analyzer from an-
other instrument or another signal in
the circuit under test. The external
trigger signal is available in edge, pat-
tern, and advanced trigger to use as
either an edge or pattern qualifier
for the trigger condition.
Frequency can be measured using
single-channel measurements. The
analyzer selects the first and third
transitions at the left side of the vis-
ible display, measures the period as
the delta time between these two
transitions, then calculates the fre-
quency as the reciprocal of the
period.
Glitch mode is indicated by “GL”
on the status line. To prevent miss-
Glossary
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