Tom_Robbo26 Posted January 5, 2009 Share Posted January 5, 2009 I am currently tied in to film an outdoor event. I will be useing 3 Sony HDVZ1E cameras and was just going to record it onto standard miniDV tapes.Recently the organisers have come to me and asked if it would be possible to run a live vision mixed feed to some screens.I have a vision mixing desk that can cope with the 3 cameras and outputting the signal from the desk shouldnt be a problem.My problem lies with getting the signals to the vision mixing desk. The cameras would all be massively spaced out from the desk and the furthest one is possibly 500m away.The camera has a component output, an S-video output and a video phono output. The desk has BNC inputs and S-video. I usually just connect via s-video but think this might be a bit long for that.Is this a crazy speculation or is it possible?Thanks in advanceThomas Link to comment Share on other sites More sharing options...
jason5d Posted January 5, 2009 Share Posted January 5, 2009 Ethernet adapters - good ones will go that faror you could use microwave transmittersso the cameras will be able to roam they are expensive at around £300 each per day to hire Link to comment Share on other sites More sharing options...
dunk_1984 Posted January 5, 2009 Share Posted January 5, 2009 Cat5 is your best option, however even this may struggle with 500m. Link to comment Share on other sites More sharing options...
Tom_Robbo26 Posted January 5, 2009 Author Share Posted January 5, 2009 Where abouts can you hire this sort of kit from? Would the microwave transmitters be more reliable than the ethernet cables? Link to comment Share on other sites More sharing options...
jason5d Posted January 5, 2009 Share Posted January 5, 2009 broadcasters use the microwave systems and we hire microwaves check the website below Link to comment Share on other sites More sharing options...
bruce Posted January 5, 2009 Share Posted January 5, 2009 Ethernet adapters - good ones will go that far Would the microwave transmitters be more reliable than the ethernet cables? CAT5, not ethernet. They're not the same thing, guys.... Yours pedantically (there's also the option of "composite video over a long bit of decent coax", which may be perfectly adequate. It all depends what you have already, what you need to hire/buy, what your budget is, what the end displays are going to be etc....) Link to comment Share on other sites More sharing options...
Peter F Posted January 6, 2009 Share Posted January 6, 2009 Pedantic implies you're making a minor correction, you are not. For the benefit of the original poster: Put "cat5 baluns" into google, or indeed the search box of this very website and a whole plethora of useful and relevant information will be at your fingertips. Put "ethernet adapters" into google and you will be no nearer answering your question. Microwave will not be more reliable than using a cat5 based solution. It will also be considerably more expensive. For the cost of hiring 3 semi-professional microwave systems you could purchase the baluns and cable required to do it with cat5. Cheers,Peter Link to comment Share on other sites More sharing options...
Pete McCrea Posted January 6, 2009 Share Posted January 6, 2009 Second/Third the CAT5 option, or if you have it, good quality coax with line drivers. Any reputable hire company should be able to help sort this out for you. We have run CV over 400m on the Extron MTP kit, and it was ok. Rated upto about 300m though. Other manufacturers will vary. Bear in mind that you may have issues with noise getting into the system, so be prepared with humblocks to help remove this if necessary. Link to comment Share on other sites More sharing options...
dosxuk Posted January 6, 2009 Share Posted January 6, 2009 broadcasters use the microwave systems Over 500m? Only if there's no alternatives. A piece of cable will always be more reliable, and cheaper. Link to comment Share on other sites More sharing options...
ceecrb1 Posted January 6, 2009 Share Posted January 6, 2009 broadcasters use the microwave systems Over 500m? Only if there's no alternatives. A piece of cable will always be more reliable, and cheaper. Yes a triax cable.... however this will envolve an entire broadcast camera, CCU and triax cable..Triax can run to 800mtrs easily and other signals can be modulated into it.. such as audio, video, coms and tally etc.. I have to assume it will cost more than your budget can reach to... worth finding out though as its a trick I abused last night..The joys of now working in OB trucks is when I am called back to do sound and projection for a job.. I can use a cameras 2nd aux video return for the live feed and just put a 5mtr bnc between the proj and the camera!! I've been out of the uk 2 years now, but I have to assume there must be companies hiring out non HD cams and ccus for cheap prices now! Link to comment Share on other sites More sharing options...
dosxuk Posted January 7, 2009 Share Posted January 7, 2009 Or, as other people in this thread have suggested, a decent bit of coax with a decent DA on the end as possibly the use of a hum blocker. Lots of OB sites with permenant cable rigs have coax / triax runs of over 1000m with no issues (admittedly several had to be recabled when SDI was brought in due to the deteriorating nature of the old cables). Link to comment Share on other sites More sharing options...
Johnparrack Posted January 13, 2009 Share Posted January 13, 2009 Or see the thread about Radio/Gigawave links ...available in sd or HD and will cope with the distance no probs..also as used by a lot of Broadcast companies. Local control units can also be genlocked and provide video/audio to rec decks if you decide against Iso'ing at the camera head. Check out Prestignes site who keep a selection of them.A second unmentioned method is to hire a fibre optic solution...again quite popular in broadcast. If its just a composite link, then either of the routes mentioned above would do the job. If you use a "Cat5" system that accepts rgb you can use 3 lines down one cable, if camera positions aren't too far apart.(100m is fine for CVBS undriven, then drive it further) Also agree with above about using Humbuckers (video Isolators) on long runs as you may encounter some hum issues. also the Triac route will also be fine if you are using Broadcast/Studio setups, which would also make it easier to "match" the cameras. Dependent upon the Vision Desk you are using....Is it digital or do the 3 cameras require genlocking? I would genlock and Jam timecode just so I don't have to mess about so much at edit. But thats just my preference. have fun Moderation: I have just gone through and changed at least five uses of "u" to the word "you". As per the BR FAQ, the use of "text speak" abbreviations like this is not considered acceptable in this forum and we'd appreciate it if you'd avoid them in future. Link to comment Share on other sites More sharing options...
Bobbsy Posted January 14, 2009 Share Posted January 14, 2009 Time for more pedantry I fear: A "triac" is an electronic component--a TRIode for Alternating Current. More properly it would be known as a "bidirectional triode thyristor" and, since one major application of the component is in dimming lights, using the term in a search would bring up quite a few inappropriate results. The kind of cable you're thinking of is commonly known as Triax, short for "triaxial cable". It's similar to co-axial cable but with a second conductive sheath, concentric with the first. Triax is very commonly used as broadcast camera cable and, with the appropriate equipment at either end, can easily handle runs of several kilometers. If you've ever been involved in the setup to cover a golf tournament you will have seen this! Bob Link to comment Share on other sites More sharing options...
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