Agilent Technologies 37907A Manual do Utilizador descarregar pdf (Página 13)

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Display Filters and Searching

Display filtering and searching lets the user search through collected data

to find specific IP addresses, values for protocol fields, or conversations

on specific bi- directional virtual connections (by VPI- VCI). The display

filters provide the flexibility to select protocol attributes or specific

protocols from a checklist, and the power to filter on any bit, byte or

characteristic, such as protocol. For example, filtering can be preformed

on OAM traffic without having to know any of the protocol specifics.

Post- processing lets the user quickly zoom in on selected criteria, from

the traffic passing between specific devices to individual conversations.

Post- processing allows the user to:

• Search through the data by record or by time stamp

• Search for events or strings

• Filter on protocols

• Verify event- to- event timing

• View protocol errors

• Print a range of cells or the entire buffer

• Export data in CSV (comma separated variables) format

• Analyze statistics based on the buffered data

Optical Power Measurements

In addition to full ATM analysis, the STM- 1/OC- 3 ATM interface has a

built- in optical power meter that allows the user to check power levels

with an accuracy of +/- 0.5 dBm. This measurement capability has the

ability to be performed using the same interface on an optical fiber

carrying STM- 4/OC- 12c, even though the interface does not otherwise

operate at 622Mb/s.

Signal Strength Pulse Amplitude Meter

In addition to full ATM analysis, the E1/T1 cells and frames interfaces

have a built- in pulse amplitude signal strength power meter that allows

users to check pulse amplitude levels with a resolution of +/- 1 dBm. The

dynamic range is between +6 dBmV and - 40 dBmV.

Line Status

The operation of the physical interface is often critical in determining

the cause of network problems. Therefore, the Advisor also tracks errors

at the physical layer. Counts of error and alarm events are recorded on

the display for both the line (network) and equipment (user) side. The

time of the last occurrence of a particular event is recorded as well.

Events are saved in the buffer and can be logged to disk.

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Agilent Technologies 37907A Manual do Utilizador Página 13