Serial Digital Interface
SDI is a transmission protocol for sending uncompressed digital video signals, using a 75 Ohm coaxial cable. The first SDI standard (SD-SDI) came into life in 1989. Since then, several additional standards have been introduced: HD-SDI, 3G-SDI, 6G-SDI and 12G-SDI.
Install Vs Flexible
Installation cables have a solid copper wire, flexible cables are made with stranded copper cores, meaning multiple small copper wires, improving on the flexibility of the cable. The disadvantage is that signals can be sent less far as the internal resistance between the wires causes more attenuation of the video signal. A solid copper wire coax will have a longer maximum transmission distance as this attenuation is significantly lower.
The difference between 1.5G, 3G, 6G and 12G
These are the bandwidths used (frequencies) for sending signals ranging from 720p (HD-SDI) all the way up to 2160p or 4K UHD (12G-SDI).
Most digital coax cables you will find can handle both 3G and 6G transmission and even 12G-SDI.
Of course, a small diameter 3G/6G coax may be able to handle 12G but be it on (much) shorter distances than it would on 1,5G, 3G or 6G transmission.
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Neutrik price list Update
Due to the significant price increase last year, and in order to keep consistency across Europe, Neutrik changed and adapted its prices for a few articles.
Check out here below our latest price list that would be used starting on the June the first.