EXFO VDSL2 User Manual
Page 190
IPTV Analysis
182
AXS-200/635
Reading Results
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IGMP ZAPTime is the time required for a channel change when traffic
is being transferred between the central network and STB.
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PCR Jitter is the short-term variation in the arrival of program clock
reference (PCR) information at the video decoder.
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MDI:DF is the media delivery index (MDI) delay factor (DF) which
monitors the amount of time the video must be delayed in the virtual
buffer due to cumulative IP packet jitter and IP packetization.
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MDI:MLR is the media delivery index (MDI) media loss rate (MLR),
which monitors the amount of media packet loss experienced per
second.
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Details button shortcuts to the applicable tab which provides more
information about a particular test result.
To view more information about each available test result:
1. Press the up/down arrows to highlight the Details button alongside the
desired test result.
2. Press
to select the desired Details button.