JCC1996 Posted September 14, 2012 Share Posted September 14, 2012 Hi, I'm just wondering if someone could clarify whether a BNC video cable will carry HD video? Joe Link to comment Share on other sites More sharing options...
David Lee Posted September 14, 2012 Share Posted September 14, 2012 Yes if it is transmitted as HD-SDI. Link to comment Share on other sites More sharing options...
dosxuk Posted September 14, 2012 Share Posted September 14, 2012 And the cable and connectors are compliant. I suspect the answer is "no" in this case... Link to comment Share on other sites More sharing options...
David Lee Posted September 14, 2012 Share Posted September 14, 2012 Certainly used standard BNC connectors on HD SDI, and I crimped them and it still worked. As to cable, as far as I understand, standard co ax cable for video is fine. Link to comment Share on other sites More sharing options...
dosxuk Posted September 14, 2012 Share Posted September 14, 2012 What is "standard coax"? :) Link to comment Share on other sites More sharing options...
David Lee Posted September 14, 2012 Share Posted September 14, 2012 Yeeah, that was a bit rubbish, just can't for the life of me remember if it is 75ohm coax. Bit of a brain fade at the mo :) Link to comment Share on other sites More sharing options...
paulears Posted September 14, 2012 Share Posted September 14, 2012 The actual specs between 'HD' Digital and Analogue cable that fit BNC connectors are surprisingly similar - the attenuation is slightly less in the HD version, as is the capacitance on the same length, and on the HD cable the velocity of propagation is higher - 66% v 83% in the two versions of Belden I looked at. The dielectric is also foam in the HD version compared with polyethylene in the SD version. I suppose if one is buying new cable for HD-SDI connects, then buying the HD labelled version gives an element of security. Link to comment Share on other sites More sharing options...
Pete McCrea Posted September 14, 2012 Share Posted September 14, 2012 Most BNC will pass Hd-SDI. How far depends on the cable quality. We've had HDSDI do 30m on VDC RG56 when we've been in a pickle. We also have canford SDVF which used to pass HDSDI over 100m lengths. Then it got driven over and doesn't do it now (were assuming it's deformed the cable so it no longer supports the data rates without the signal getting to mushed by the time it reaches the end)... We also have Extron RH6 'High Resolution' stuff that easily does 100m, but due to being solid core isn't as nice to handle. All our cables are terminated on 75Ohm BNC with the SDVF and Extron RG6 on specific HD BNC's. Link to comment Share on other sites More sharing options...
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