Agilent Technologies 37907A Manual do Utilizador descarregar pdf (Página 21)

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Monitor Tool

Viewing Messages

The main traffic overview display shows (chronologically) every message

captured for each signaling link. This overview display shows one line of

essential information for each message. The type and format of

information is displayed in columns and is controlled by the user. Each

message can be decoded further to show a one line description per

octet/field. Figure 4 shows a typical traffic overview.

In the decode view, each protocol level is shown in a different color to

make troubleshooting simpler. Users can customize colors to suit personal

preference. When analyzing data, the user can pause the display and

interrogate decodes before resuming the analysis. Captured data can be

saved or exported. Figure 4 shows a typical traffic overview.

Time Stamping

Each captured message is given a timestamp. The timestamp reference is

the instrument’s internal clock.

Alarm View

If a physical layer alarm occurs (e.g., AIS), a pop- up alarm view window

appears showing software LEDs for all bearers. This view can be

expanded to show individual alarm conditions.

Link Status and Message Validation

Link status and link loading information is available for each link under

test. Link loading statistics include erlang rate, percentage breakdown of

traffic types, and counts of erroneous Signaling Units or frames.

Message Validation

The software can highlight message- encoding errors found in received

messages. In the traffic overview display, a message with an error is

highlighted in red. When the message is decoded, the erroneous section

is also shown in red to aid troubleshooting.

Message Sequence Validation

The ‘‘message sequence validation’’ function advises the user of errors in

message sequences (e.g., messages which do not fit into a normal call

pattern). The erroneous messages are highlighted in red.

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Agilent Technologies 37907A Manual do Utilizador Página 21