metrotek Bercut-ET, Руководство по эксплуатации

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72 Analysis. Typical tasks and solutions
Figure 5.77. BERT setup menu
• Level — select OSI model layer to perform test at:
– 1 — Physical layer;
– 2 — Data Link layer;
– 3 — Network layer;
– 4 — Transport layer.
• Pattern — select standard or user-defined test pattern.
• User — specify user-defined pattern.
• Frame — specify frame size.
•
Rate (L2) — framed rate value specified in percent ( ), in kbps
( ) or in Mbps ( ).
•
Test duration — specify test duration.
• Tests topology — switch to Topology menu.
Figure 5.78. Topology menu
Use the Topology menu to specify receiving and transmitting ports.
The same port can be used for both data transmission and receiving
(for example, with the Loopback feature). If you use asymmetric test
function you must select
Remote as receiving/transmitting port (see
Bercut-ET. Operations manual