Wavetek ANT-20, Operating Manual

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Broadband Analyzer/Generator ANT-20/ANT-20E
TB-10 Technical Background
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A connection is accepted if:
– The called party address is the same as the instrument address
– The setup message has the format given above
– The stated contract parameters are plausible and the instrument is capable of generating
the required cell stream. This also applies, even if traffic generation is disabled.
– The instrument dos not already have four active connections.
•
Layer 2 (Signaling - AAL) is implicitly configured by the choice of signaling protocol. The
following rule applies:
– UNI 3.1, Q.2931: SSCOP to Q.2110, SSCF to Q.2130
– UNI 3.0: SSCOP to Q.SAAL.1, SSCOP to Q.SAAL.2
2.3 Starting and stopping signaling, generating test traffic
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The signaling emulation starting and stopping points are coupled to the measurement
sequence control of the Application Managers.
– No virtual connections are present outside the measurement interval. This means that no
resources are occupied in the device under test outside the measurement interval. This
can be important, particularly with timer-controlled measurements.
– Generation of test traffic begins on a virtual channel as soon as the connection is
switched. It ends when the connection is cleared down. This assumes that est traffic has
been enabled (”Traffic Enable”).
•
Test traffic generation can be affected manually. Two types of traffic generation are possible:
– SVC test with “Bearer Test”:
If the “Traffic Enable” command is activated before starting the measurement or if the
“Automatic Traffic Enable” option is enabled, the instrument starts generating test traffic
as soon as a connection is switched.
– SVC test without “Bearer Test”:
If the “Traffic Enable” command (or the corresponding icon button) is deactivated before
the start of the measurement and the “Automatic Traffic Enable” option is disabled, the
instrument will not generate test traffic.
The test traffic can be switched on or off at any time during a measurement using the “Traffic
Enable” command (or the corresponding icon button).
2.4 “Calling” mode
Fig. TB-6 Configuration diagram (VI “ATM Test Control”)
Calling instrument (Reference point)
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