Agilent Technologies 622Vu Advisor, User Manual

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analysis device is known as OLE Automation. This mechanism, developed by Microsoft, uses
state-of-the-art technology to ensure complete control over processing as well as efficient data
transfer.
You’ll use CellCommand to define transmit sequences (sets of cells), scripts, and QoSMeter
tests; and to translate these definitions into direct function calls to the analysis device’s device
driver. CellCommand is the only vehicle by which other Windows applications can pass
instructions or data to and from the analysis devices; i.e., it’s the only code that can access the
analysis device’s device driver.
CellCommand is implemented as:
•
an OLE 2 in-process server, meaning that it’s responsible for the complete imple-
mentation of its objects. Automation clients can get everything they need from the DLL,
without going through another DLL.
•
an OLE 2 Automation object, allowing other applications (Visual Basic and C++ for
example) to dynamically discover and use its interfaces at run time. This provides a form
of late binding to the interfaces, allowing each CellCommand object to describe its
capabilities to any tool dynamically, while letting that tool control the programming
environment — language, vendor, functions enabled, etc.
cell header
See header.
cell library
Repository for various 622Vu Advisor information: sequence definitions, script
definitions, filterset definitions, QoSMeter test session definitions, etc. 622Vu Advisor can
manage any number of cell libraries, but only one library is open (active) at any given time.
Any changes made during processing are saved in the active cell library immediately.
All 622Vu Advisor processing requires that you have an active cell library. Each library is a
complete entity, containing all the sequence and script definitions, filter buffers, filter entries,
etc., which are used together during processing. (Only two types of information are stored
outside of the cell library, both for processing efficiency: profile definitions and cell
captures.)
622Vu Advisor is distributed with several libraries, as detailed in Appendix C. Within a given
cell library there are several distinct directories (one to store sequences, one to store scripts,
etc.). Refer to Appendix D for a description of the library structure.
Cell Loss Priority
See CLP.
cell name
Name assigned to a particular cell, to identify it within its parent sequence.
cell networking
Technology involved in transmitting all data in small, fixed-length packets
(cells). With cell networking, a sender breaks a data packet into cells before transmitting it
across the network to the receiver. The receiver takes the cells and reassembles them to form
the packet. Cell networking is also known as cell switching or cell relay.
The most common form of cell networking calls for 53-byte cells comprising a 5-byte header
and 48 bytes of data. This is the size required by the ITU’s ATM standards.
cell property
Characteristics of a cell that are either defined or undefined at each of the cell
and/or sequence levels, but that are always considered defined at the script level. These
characteristics include:
GFC — Generic Flow Control.
VPI — Virtual Path ID.
VCI — Virtual Channel ID.
PTI — Payload Type Indicator.
CLP — Cell Loss Priority.
A: Glossary
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