HP 54620A, Руководство пользователя и сервисное руководство

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ing glitch pulses, the analyzer auto-
matically enables glitch capture once
the time/div setting is 1
µ
s/div or
slower. In glitch capture mode, the
analyzer uses memory resources to
record an event where at least two
transitions occurred between sample
periods. The analyzer can capture
pulses as narrow as 3.5 ns and as
long as the sample period -1 ns at
any sweep speed.
Graticule refers to the hash marks
on the display. These marks can be
set to full, frame, or turned off.
Hold time is the time for which a
data input to a clocked device must
remain stable after the active edge of
the clock occurs. Violating the hold-
time specification of a device can
lead to unstable circuit operation.
Horizontal controls adjust the
time base, horizontal mode, and de-
layed sweep functions.
Labels are terms defined or cho-
sen from a predefined list to
associate input channels with their
functions in the system under test.
When you assign a label ending in a
digit, such as D0, the analyzer in-
serts the label into the novolatile
label list, automatically increments
the digit, displays the modified label
in the entry field, and selects the
next channel. The label generator
also allows you to assign colors to
channels.
Measurement algorithms are
used to calculate input frequency, in-
put period, duty cycle, positive
width, and negative width.
Measurement field is located be-
low the memory bar. This area is
used to display results for single-
and dual-channel measurements, ac-
tivity indicators, trigger settings,
error messages, and status messages.
Memory See “Display memory,”
“Setup memory,” or “Trace memory.”
Memory bar is the horizontal line
below the waveform display area
which shows the amount of acquisi-
tion memory that is displayed, and
the position of the display with re-
spect to acquisition memory. When
the analyzer is stopped, you can
change the size of the display with
respect to acquisition memory using
the Time/Div control knob, which al-
lows you to zoom in on a specific
portion of memory. You can also use
delayed sweep or pan the display us-
ing the Delay knob.
Minimum detectable pattern width
is the minimum time for which an in-
put pattern must remain stable for
Glossary
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