Specifications

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Glossary
CRC (Cyclic Redundancy Check)
A common technique for detecting
data transmission errors.
cross triggering Using intermodule
capabilities to have measurement
modules trigger each other. For
example, you can have an external
instrument arm a logic analyzer,
which subsequently triggers an
oscilloscope when it finds the trigger
state.
data channel A channel that
carries data. Data channels cannot be
used to clock logic analyzers.
data field A data field in the pattern
generator is the data value associated
with a single label within a particular
data vector.
data set A data set is made up of all
labels and data stored in memory of
any single analyzer machine or
instrument tool. Multiple data sets
can be displayed together when
sourced into a single display tool. The
Filter tool is used to pass on partial
data sets to analysis or display tools.
debug mode See monitor.
delay The delay function sets the
horizontal position of the waveform
on the screen for the oscilloscope and
timing analyzer. Delay time is
measured from the trigger point in
seconds or states.
demo mode An emulation control
session which is not connected to a
real target system. All windows can
be viewed, but the data displayed is
simulated. To start demo mode,
select Start User Session from the
Emulation Control Interface and
enter the demo name in the
Processor Probe LAN Name field.
Select the Help button in the Start
User Session window for details.
deskewing To cancel or nullify the
effects of differences between two
different internal delay paths for a
signal. Deskewing is normally done
by routing a single test signal to the
inputs of two different modules, then
adjusting the Intermodule Skew so
that both modules recognize the
signal at the same time.
device under test The system
under test, which contains the
circuitry you are probing. Also known
as a target system.
disparity A calculation of the
balance of 1's and 0's in a transmitted
data stream. Disparity is used in 8B/
10B encoding to determine which of
two possible 10-bit values should be
used to represent a particular 8-bit