Testing IPTV Channel Zapping Performance Application Note
IPTV channel zapping is a key element of the user's QoE (Quality of Experience). Agilent N2X provides the most accurate and reliable channel zapping test solution that helps service providers and network equipment manufacturers evaluate if network equipment is ready to enable"Triple Play" services.
Test your network device's IPTV channel zapping performance with Agilent N2X.
The end user experience of service quality is critical to the success of a service provider's IPTV deployment program. A key element of IPTVquality of experience (QoE) is how quickly and reliably end users can change TV channels, often referred to as "channel zapping".
Network equipment use multicast to deliver IPTV channels to consumers. Set-Top Boxes in the home use IGMP (Internet Group Management Protocol) to change channels, by leaving and joining multicast groups representing channels.
The speed at which multicast groups are left and joined greatly affects user viewing experiences.
If users expect a channel zapping delay of one second, each device in the end-to-end IPTV network can introduce only tens to hundreds of milliseconds of delay. This Application Note describes how to use N2X to quantify the channel zapping performance of IGMP-capable
devices.
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Network Services 
