topic Re: HDMI extender over Cat6 issue in Sky Q

HDMI extender over Cat6 issue

NeddyFlanders — Wed, 19 Apr 2023 21:35:35 GMT

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.

Re: HDMI extender over Cat6 issue

PandJ2020 — Wed, 19 Apr 2023 21:45:54 GMT

What video resolution is the Q box outputting?

Re: HDMI extender over Cat6 issue

NeddyFlanders — Wed, 19 Apr 2023 22:02:15 GMT

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

Re: HDMI extender over Cat6 issue

bob1234 — Thu, 20 Apr 2023 07:35:09 GMT

@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.

Re: HDMI extender over Cat6 issue

NeddyFlanders — Thu, 20 Apr 2023 11:27:52 GMT

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

Re: HDMI extender over Cat6 issue

PandJ2020 — Thu, 20 Apr 2023 12:22:21 GMT

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

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

Re: HDMI extender over Cat6 issue

bob1234 — Thu, 20 Apr 2023 12:31:23 GMT

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

Re: HDMI extender over Cat6 issue

StuartMuirhead67 — Thu, 20 Apr 2023 13:15:41 GMT

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.

Re: HDMI extender over Cat6 issue

NeddyFlanders — Thu, 20 Apr 2023 13:26:38 GMT

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

Re: HDMI extender over Cat6 issue

PandJ2020 — Thu, 20 Apr 2023 14:17:48 GMT

@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.

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

Re: HDMI extender over Cat6 issue

PandJ2020 — Thu, 20 Apr 2023 14:18:20 GMT

@NeddyFlanders wrote:
Hi @PandJ2020
Could I ask if you could recomment an extender that I could use in this situation?

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

Re: HDMI extender over Cat6 issue

bob1234 — Thu, 20 Apr 2023 16:24:00 GMT

@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.

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