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.

[SteDC]

I'm having similar issues, garbled sound, sometimes out of sych with video and sound. On occasions no sound. This issue appears to only become an issue over the past 12 months. All wiring checked. Normally I need to power down Sky q box to reset. Starts to work fine again for a few hours. HDMI converter details shown below. Is the only solution to swap out all hdmi converters ? I have a fair amount to swap.

Specification: Supports resolutions: 480i@60Hz,480p@60Hz,576i@50Hz, 576p@50Hz,720p@50/60Hz,1080i@50/60Hz, 1080p@50/60Hz Working Temperature: -10¡æ ~60 ¡æ Link Connector(Sender/Receiver): UTP/STP CAT5e/6 Power Consumption: 3W (max) each Relative Humidity: 20%~90% Power Supply: DC 5V/1A Dimensions: 110 x 58 x 26 mm Weight: 239 g Cat5e/6 cable: Follow the standard of IEEE-568B

[Chodley]

You are outputting 1080p @50 / 60 presumably?

[SteDC]

Yes, correct, I'm outputting 1080p @50 / 60hz.