Try separating the 2.4GHz and 5Ghz networks in the airport utility, just add 
2.4 and 5 onto the name of the network so you can see which one you're joining. 
Join the appletv onto the 2.4 and see if that helps. 

While technically you'd get a faster signal on the 5, it finds it more 
difficult to get through walls etc, so the overall throughput can be worse.

Regards

Sam



                
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On 12 Jul 2015, at 22:24, Benjamin Phillips <[email protected]> wrote:

Hello all,

First I would like to apologies for the length of this post however hope the 
information is useful to anyone able to reply.

I hope you can help me diagnose why I am having problems with my Apple TV (3rd 
Gen). The majority of the time it is plugged in with an ethernet cable and I 
have no problems with it. There is however the odd occasion like this afternoon 
where I take the box and connect it to the TV in the lounge running through 
WiFi. I have found that performance is affected and I often I have to wait for 
the film to buffer, especially with HD content.

The following information should help your understanding of the wireless 
environment and help with any recommendations you may have.
There are 5 people living in the household with many wireless devices. 
Downstairs is a BTHomeHub2 which everyone in the house expect me uses as the 
router.
I have a Cat5e cable running from the router to my bedroom upstairs connected 
to an AirPort Extreme base station set up as a different network. This base 
station can therefore handle my internal tasks and only go back to the main 
router for wifi connectivity which I have found reduces the amount of stress on 
the network. Connected via ethernet cable is my printer, mobile signal boost 
box because there is no mobile signal at the house and the AppleTV when it is 
in the room. Connected wirelessly is my 5K iMac, iPhone, iPad, MacBook Pro and 
perhaps the occasional other device.

When the Apple TV is in the lounge it is connected wirelessly to the AirPort 
Extreme, the same network as my iMac is connected to with the iTunes Library. 
The Apple TV is located one floor down and no more than 2 meters across. At 
this point the Apple TV states it has 3/5 bars connection signal. I have 
attached a screen shot of the performance graphs as part of the network 
diagnostics utility on my iMac. Not sure what this tells you which is useful.

Any recommendations you have as to how to reduce the buffering are much 
appreciated.

Thank you in advance.

Benjamin Phillips
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