Specifications

211
Glossary
the transmission medium. In
reference to protocol definitions,
physical layer describes a protocol
that is used at the bottom of the
protocol stack on a data bus.
pod pair A group of two pods
containing 16 channels each, used to
physically connect data and clock
signals from the unit under test to the
analyzer. Pods are assigned by pairs
in the analyzer interface. The number
of pod pairs available is determined
by the channel width of the
instrument.
pod See pod pair
point To point to an item, move the
mouse cursor over the item, or
position your finger over the item.
preprocessor See analysis probe.
primary branch The primary
branch is indicated in the Trigger
sequence step dialog box as either
the Then find or Trigger on
selection. The destination of the
primary branch is always the next
state in the sequence, except for the
Agilent Technologies 16517A. The
primary branch has an optional
occurrence count field that can be
used to count a number of
occurrences of the branch condition.
See also secondary branch.
probe A device to connect the
various instruments of the logic
analysis system to the target system.
There are many types of probes and
the one you should use depends on
the instrument and your data
requirements. As a verb, "to probe"
means to attach a probe to the target
system.
processor probe See emulation
probe.
protocol stack A set of protocol
layers that work together. The OSI
Reference Model that defines seven
protocol layers is often called a stack,
as is the set of TCP/IP protocols that
define communications over the
internet.
protocol An agreed-upon format for
transmitting data between two
devices. The protocol determines: the
type of error checking, data
compression, encoding, how sending
devices indicate they have finished
sending a message, and how
receiving devices indicate they have
received a messaage.
range terms Logic analyzer
resources that represent ranges of
values to be found on labeled sets of
bits. For example, range terms could
identify a range of addresses to be
found on the address bus or a range