Tektronix MTM400 Manual do Utilizador descarregar pdf (Página 129)

Stream View

MTM400 MPEG Transport Stream Monitor User Manual 3-81

t(now)

t(-1)

t(-63)

t(rest)

PID1

PID100

Time

Start time

Timespan

Count

Figure 3-33: Service logging - Data storage

The timing resolution should not be set too fast or data may reach the bottom of the

grid (t(rest)) before it can be read. If data does reach the bottom of the grid, it is not

lost but it is accumulated in the final row. Accumulated data is added to the bottom

row for up to three days. After this time the data is discarded and the PID is no

longer monitored.

When a service log is being monitored from multiple locations, only one location

should be selected to consume entries. This will allow all locations adequate time

to view or log the entries.

The customer must balance the level of detail required (the timing resolution) with

the infrastructure that is required to collect, store, and collate the information.

Typically the timing resolution is set for 1000 ms; in this case the grid cell will

contain a value approximating to 'packets per second'; to improve accuracy each

count has an associated duration.

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Tektronix MTM400 Manual do Utilizador Página 129