vga over cat5

[MrBoomal]

Hello all,

 

Rather outside my comfort zone.

 

If I use the following:

 

http://cpc.farnell.c...side/dp/AV18372

 

http://cpc.farnell.c...side/dp/AV18371

 

Can I run 50m of vga signal to a projector using standard cat 5 cable such as this ?

Would I be better with Cat 6? Is that better quality ?

 

http://cpc.farnell.c...135?Ntt=av16135.

 

Also, does anybody know of a suitable mount to enable me to hang an Epson 830 projector off a standard lighting bar ?

 

I can find ceiling mounts but I can't see this being suitable without some major work.

 

Thanks.

[Ynot]

Also, does anybody know of a suitable mount to enable me to hang an Epson 830 projector off a standard lighting bar ?

Assuming it has the standard threaded holes in the base and the image can be inverted, you can't go far wrong with these from CPC.

We use them a lot.

Just bolt a couple of half-clamps on them and bingo.

[dunk_1984]

Also, does anybody know of a suitable mount to enable me to hang an Epson 830 projector off a standard lighting bar ?

 

I can find ceiling mounts but I can't see this being suitable without some major work.

 

Both Unicol and Top-Tec provide solutions for mounting projectors on tube.

 

E.g. https://www.top-tec.co.uk/105-TM05.html

[handyandi]

Am using the same CPC cat-5 baluns in an install with VGA over standard cat5 cable (UPT-unscreened) run is at least 20m+. There is a little interference from the installed loop system which runs parallel to the cat-5 run but no way near as much as when it was a plain bit of VGA cabling.

[AHYoung]

Why mess about, get some decent vga cables and it will work better with less points of failure and be no more expensive. Its hard to imagine how low quality a 20m vga cable you have to have been using to get better results from cheapo passive baluns and cat 5?

 

Vision Make a decent mount

 

http://www.misco.co.uk/applications/SearchTools/item-details.asp?EdpNo=433444&CatId=0

 

for someone who sells them a fiver cheaper than us... take the mounting plate off and use the m10 bolt to attach a standard hookclamp . its well suited to the epson projector and very usable, They do a version with a 1200mm pole as well if you need a longer drop...Unicol do a mount with what they call a TM5 tube clamp which id use for a "big" projector, but id probably use the vision myself with an epson.

[MrBoomal]

I did think about using ordinary VGA cable but was worried about the 50m distance.

[SoLiEn]

http://www.keene.co....p?mycode=eva214

 

I have this. it is frigging fantastic and has not let me down in 3 years. Superb piece of kit, also have run it through an installed patchbay and had no problems whatsoever, About to buy another one!

 

e2a its used on a 100m run and there is no loss in picture or any problem what so ever.

[rgye]

On the matter of hanging projector mounts, I don't much like the sort with a hook and a bolt underneath like the TopTec and Unicol - you have to do the bolt up extremely tight to get a rigid mount, and they are quite awkward because you can't use a ratchet spanner. I would go for something with a standard scaff clamp at the top like this: http://cpc.farnell.com/ultimax/umproj001/projector-mount-50mm-truss/dp/ST01720?Ntt=st01720

 

A word of warning on VGA over Cat5. The baluns you highlight are passive, which makes them inexpensive but does limit their range. Some bits of kit - for example the Kramer scaler range - do not have enough output to drive long distances through a passive balun. We use them for short runs, but for 50 metres I would say that you should definitely use an active balun. The Kramer ones are good but expensive; DataBay have served us well, and some of the CPC unbranded ones have proved pretty good. I don't think there is any merit in using Cat6 rather than Cat5 cable, and indeed I have read of people getting sync shifts with Cat6 although I've not had problems myself.

[Pete McCrea]

I believe CAT5 and CAT6 have different skew characteristics on the pairs, so in theory CAT5 Baluns need to be used with CAT5 cable and vice versa.

[ranvier]

Would I be better with Cat 6? Is that better quality ?

 

Generally, Cat 6 performs better for data transmission. Due to the fact that the pairs of wires are being twisted more tightly, resulting in lesser crosstalk.

 

However, this is not good news for A/V transmission as this will cause higher level of skewing. So, use cat5e cables or get something like those, "Extron Enhanced Skew-Free™ A/V UTP Cable" instead.

[dbuckley]

Cat5 is definitely better from the skewing point of view, particularly if you are using passive converters; many actives have a "skew" control on them to compensate for the differential delay in the wire.

 

Many people think this is utter cobblers, but it is real. Check out this (sorry - camera phone) picture I took at a supermarket whilst out shopping one day, the image is of black and white boxes, but you can see colours either side of the white and black bands. Its not that clear in the photo, but was fully clear on the display.

 

http://davidbuckley.name/pix/cat6_video_smearing.jpg

[MrBoomal]

Thanks for everyone's help.

 

Have ordered the trussmount bracket from CPC, have upgraded the baluns to active, and a wahlberg DMX shutter.

 

Will let you know the outcome when it's all set-up.

 

Thank you.