Transmitting 1080p DVR signal over a 15m VGA cable

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Hi,

I have a Hikvision Turbo 8 channel 1080p CCTV DVR, which can export the feed via both a HDMI port and a VGA port at 1080p.

I have two monitors connected to the DVR, one connected via a short 2m 1080p cable in the same room and one connected via a very long 15m VGA port.

When i have the output of the DVR display set to 1080p, it works fine on the short HDMI connected monitor, but does not work on the long VGA connected monitor.

But when i switch down the resolution to 1920 xx 1280, it works on both monitors.

Hikvision say this is because the Graphics Unit of the DVR is not powerful enough to transmit 1080p over the long 15m cable.

Are there any devices that i can buy that will take the 1080p VGA signal and boost it?

I have already tried two VGA to RJ45 converter boxes, but this did not work.

Thanks
 
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VGA to RJ45 converter boxes, but this did not work.

I think trying to boost VGA is a bit 'flogging a dead horse' TBH!

I have a Hikvision DVR and a very similar setup to you. To export 1080p to the remote monitor, I use HDMI over cat5e adapters, similar to this...

MM60-051.jpg


The good ones have HDMI pass-through for the local monitor. It works great. The only downside, was initially, they caused interference patterns on all TVs in the house using Sky RF2 input, because I was just using an existing Cat5e that happened to be in the same conduit as the Sky RF2 output which travelled to the loft together. As soon as I ran another cat5e up to the loft, away from from the WF100 cable, and kept them 2 feet apart in the loft, problem solved.

I have never used the IR pass-through feature, so can't comment if it's any good, but it's main purpose works great.
 
I think trying to boost VGA is a bit 'flogging a dead horse' TBH!

I have a Hikvision DVR and a very similar setup to you. To export 1080p to the remote monitor, I use HDMI over cat5e adapters, similar to this...

MM60-051.jpg


The good ones have HDMI pass-through for the local monitor. It works great. The only downside, was initially, they caused interference patterns on all TVs in the house using Sky RF2 input, because I was just using an existing Cat5e that happened to be in the same conduit as the Sky RF2 output which travelled to the loft together. As soon as I ran another cat5e up to the loft, away from from the WF100 cable, and kept them 2 feet apart in the loft, problem solved.

I have never used the IR pass-through feature, so can't comment if it's any good, but it's main purpose works great.

Hi,

Thanks for your v informative reply!

I have found this on ebay:

https://www.ebay.co.uk/itm/ClimaxDi...-Single-CAT6-50M-W-IR-LoopOut-UK/401220931928

I will try connecting both monitors then via the HDMI port.

However, my second monitor does not have HDMI. Would it be OK if i took the ethernet / HDMI right up to this monitor and then used a HDMI/VGA basic converter just to connect to the monitor?

https://www.ebay.co.uk/itm/Input-HD...370190&hash=item2a71d3449a:g:VaMAAOSwYUdbLmbS

Thanks
 
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Would it be OK if i took the ethernet / HDMI right up to this monitor and then used a HDMI/VGA basic converter just to connect to the monitor?

In theory that should work, but I'm not sure TBH. I would feel a lot more confident of it working reliably if the 'HDMI to VGA' adapter you were using had it's own power supply, rather than drawing power through the other adapter, like this one...

https://www.ebay.co.uk/itm/183250672740
 
Links in this post may contain affiliate links for which DIYnot may be compensated.
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Hi,

I have a Hikvision Turbo 8 channel 1080p CCTV DVR, which can export the feed via both a HDMI port and a VGA port at 1080p.

I have two monitors connected to the DVR, one connected via a short 2m 1080p cable in the same room and one connected via a very long 15m VGA port.

When i have the output of the DVR display set to 1080p, it works fine on the short HDMI connected monitor, but does not work on the long VGA connected monitor.

But when i switch down the resolution to 1920 xx 1280, it works on both monitors.

Hikvision say this is because the Graphics Unit of the DVR is not powerful enough to transmit 1080p over the long 15m cable.

Are there any devices that i can buy that will take the 1080p VGA signal and boost it?

I have already tried two VGA to RJ45 converter boxes, but this did not work.

Thanks

1920x1080 (1080p) is right at the upper limit of what's possible with VGA. If the hardware and/or cable is borderline quality, or you're trying to transmit over an extended range, then the signal will fail. This is exactly what you have found.

The number one problem is cable bandwidth and attenuation. If you're not sure what that is, it's how much signal it can carry and how much is lost per metre. Cheap VGA cables will be okay for 800x600 and 1280x720 (720p). But when you start increasing the pixel count to the higher resolutions then, sooner or later, you'll hit the limits of what the cable can carry at that distance.

BTW, 1920×1280 would be higher resolution than 1080p, and so even less likely to work. I think you might have had the output running at 1280x720 (720p).

To transmit 1920x1080 analogue VGA you'll need a thick and we'll shielded cable with about 180-220MHz bandwidth. That means brands such as Van Damme, or Kramer, Liberty, Webro and similar. Budget around £300 (yes, seriously).

You'll also need a line driver from someone such as Exton to make sure the signal is strong enough for the journey.

TBH, this is all a colossal PITA. Stick with HDMI.

Change the monitor: Buy a used 1920x1080p monitor with either DVI or HDMI in. Use one of the Cat balun systems to make the HDMI signal travel the distance. This will all be far easier and much cheaper than trying to turn a pigs ear of a VGA solution in to a silk purse.
 
It's possible that the higher resolution is simply out of range for the VGA monitor. Have you tried it with a shorter cable?
 

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