HDMI extender over Cat6 issue

[NeddyFlanders]

Hi everyone, I  have my sky q box setup in a comms rack in my house where I have ran cat6 cables to the 3 tv points in my house. 

I have a HDMI over Cat 6 Extender (StarTech), but the picture & audio drop out every 5 seconds or so. This is not a cabling issue as I've had all the cat 6 cables tested. The issue seems to be exclusively to the sky Q box as I can stream other HDMI outputs from the same location no problem. 

Any help/ideas would be greatly appreciated. 

[PandJ2020]

What video resolution is the Q box outputting?

[NeddyFlanders]

It's set to 1080p. But lowering it to 576p only helps slightly. 

[bob1234]

@NeddyFlandersWhat is the exact model, there seem to be lots, not all have the correct HDCP

This is the main Q box as the mini boxes do not support 4K.

[NeddyFlanders]

Hi @bob1234 

The HDMI By STartech- HDMI Over Cat5e/6 Extender - 4k 30Hz - 130ft(40m)

https://www.startech.com/en-ie/audio-video-products/extend-hdmi-4k40c6p1

The Sky Q Box is Model : ES340A-d8-UKIE 

SKY Part Code 16930

[PandJ2020]

Q requires HDCP 2.2 (the extender only supports 1.4).

Also bear in mind that 4K signals are 2160p/50 (or 2160p/60).

[bob1234]

@NeddyFlandersI believe the Q box output is 50Hz which could be the problem.

[StuartMuirhead67]

Hi there, I have also had a sky q box recently installed, replacing a sky + had box. This ran over hdmi and cat 5/6 extenders perfectly but now drops audio and the video jitters every now and then. 

I have two tvs with the extender splitting the hdmi. HDMI not running over cat5/6 works fine. 

Interested to to know more about HDC and hertz issues. Sky engineer arrives tomorrow but suspect he will say it is the cat 5/6 cable.

[NeddyFlanders]

Hi @PandJ2020 

Thanks for getting back to me.

Could I ask if you could recomment an extender that I could use in this situation?

Kindest Regards

[PandJ2020]

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@StuartMuirhead67 wrote:

Interested to to know more about HDC and hertz issues. Sky engineer arrives tomorrow but suspect he will say it is the cat 5/6 cable.

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The extender needs to be capable of carrying the Q signal - both in terms of resolution and refresh rate (which is generally 50Hz).

[PandJ2020]

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@NeddyFlanders wrote:

Hi @PandJ2020 

Could I ask if you could recomment an extender that I could use in this situation?

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Sorry, you'll need to check the specs an ensure they carry HDCP2.2 and up to 2160p/60.

[bob1234]

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@StuartMuirhead67 wrote:

Hi there, I have also had a sky q box recently installed, replacing a sky + had box. This ran over hdmi and cat 5/6 extenders perfectly but now drops audio and the video jitters every now and then. 

I have two tvs with the extender splitting the hdmi. HDMI not running over cat5/6 works fine. 

Interested to to know more about HDC and hertz issues. Sky engineer arrives tomorrow but suspect he will say it is the cat 5/6 cable.

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Splitters also give problems depending on the type and where they are, everything connected to splitter must be highspeed and HDCP2.2.