Wavetek ANT-20, Руководство по эксплуатации

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ANT-20/ANT-20E Broadband Analyzer/Generator
Introduction I-9
6 Often used terminology
Application
An application consists of a suitable collection of virtual instruments (VIs for short) used to solve
a measurement task. In this way applications can be defined e.g. for physical layer or ATM layer
measurements.
Applications are configured and managed in the “ANT20 - <Application Title>” window
(Application Manager VI).
If an application is saved, the parameter settings for the VIs used will also be saved.
In the same way, the measurement results are also saved with the application.
When the application is loaded, the test equipment is automatically set to the same settings as
when the application was last used.
Test type
The “test type” is a concept used for ATM measurements. Test types are used to simply and
quickly configure the instrument and prevent operating errors, particularly if signaling emulation
is being used.
A test type consists of a measurement mode (only “ATM-Layer QoS” is available in this software
version) and a “connection mode”.
When a test type is selected, the instrument is pre-set for performing the measurement. A setup
dialog is provided for each test type so that you can make settings that are specific to the test
you want to perform.
The settings for all test types used are saved within an application. When an application is
loaded, the last test type used in the application will automatically be activated.
Example test types:
•
ATM Layer QoS (PVC) - Point-to-point
•
ATM Layer QoS (SVC) - Calling
•
ATM Layer QoS (SVC) - Self-Call
Connection mode
The “connection mode” indicates the way that the virtual connection is switched through the
ATM layer.
Example connection modes:
•
For permanent virtual connections (PVC):
– Point-to-point
– Looped
•
For switched virtual connections SVC):
– Calling (switched point-to-point connection with calling instrument)
– Called (switched point-to-point connection with called instrument)
– Self-Call (switched connection with self-call)