Tektronix MTM400 Manual de usuario descargar pdf (Pagina 131)

Stream View

MTM400 MPEG Transport Stream Monitor User Manual 3-83

The timing resolution of counts is controlled by configuration file parameter PS4

(Packet Counting Bin Duration) multiplied by PS6 (Number of Packet

Counting Bins), typically PS4 * PS6 is set for 1000 ms.

PS4 is the τ (tau) value for the PID occupancy bit rate measurement as defined in

TR 101 290. This value affects many measurements; in this case it ensures that the

timespan is a whole multiple of the bit rate counting interval and reduces sampling

errors. PS6 should be set to give the required count duration - Timing Interval

(PS4 * PS6 * 10).

Service Log Configuration

The Service Log parameters can also be set using the configuration file.

The example below shows how to monitor four PIDs. Note that the PIDs may be

specified as separate elements or as a space delimited list.

<?xml version="1.0" encoding="UTF-8"?>

<MTM400Configuration Name="Service Log Config"

xmlns:xsi="XMLSchema-instance"

xsi:noNamespaceSchemaLocation="config.xsd">

</ServiceLog>

</Stream>

</Streams>

</MTM400Configuration>

This configuration can be embedded in a full configuration file, or just uploaded as

an incremental change (refer to Configuration File Structure in the MTM400

MPEG Transport Stream Monitor Programmer Manual).

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Tektronix MTM400 Manual de usuario Pagina 131