Exfo VDSL2 Manual do Utilizador descarregar pdf (Página 207)

IPTV Analysis

Copper, VDSL2, ADSL2+, and IP Triple-Play Test Set 199

Reading Results

Stream Parameters

The Stream Param tab allows you to view the detected video Stream

Rates and the PASS/FAIL status of the multicast IP address assigned to the

specific video channel or Analyzed Stream.

The available test results are the

following:

³ IP Packet is the IP data rate for the

IPTV service, for the selected

channel.

³ Transport Rate is the bit rate

calculated based on the program

clock reference (PCR).

³ Null Packet Rate is the rate calculated for MPEG2-TS null packets. Null

packets are defined as having no data.

³ MDI is the media delivery index (MDI) or IP cumulative jitter and

packet loss rate for the video stream.

³ DF(Ave) is the average delay factor (DF) or the average amount of time

the video must be delayed in the virtual buffer due to cumulative IP

packet jitter and IP packetization.

³ DF(Min) is the minimum delay factor (DF) or the minimum amount of

time the video must be delayed in the virtual buffer due to cumulative

IP packet jitter and IP packetization.

³ DF(Max) is the maximum delay factor (DF) or the maximum amount

of time the video must be delayed in the virtual buffer due to

cumulative IP packet jitter and IP packetization.

³ VB(Min) is the minimum virtual buffer (VB).

³ VB(Max) is the maximum virtual buffer (VB).

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Exfo VDSL2 Manual do Utilizador Página 207