It is a standard which defines a type of connector for use in the connection between the camera and the CCU for broadcasting and high definition professional video, combining electrical and optical signals (copper and fiber).).
The SMPTE 304 connector is designed for use with a cable that also follows an SMPTE standard, in this case SMPTE 311. This cable consists of::
2 Single-mode fibres (see Single-Mode Fibre):):
9.5 µm/125 µm
Wavelength 1250-1625 nm.
≤0.8 dB/Km
2, 4 or 8 Power conductors (Auxiliary Conductors according to standard):
Voltage: 600 Vac
Current: 10 A
Section: 0.6 mm2
2 Low Voltage conductors (control or signal) (Signal Conductors according to standard):
Voltage: from 42 Vac to 60 Vac
Current: 1 A
Section: 0.22 mm2
What signals are transmitted?
This hybrid cable transmits video, audio, and control signals (between the camera and its CCU), and also delivers power.
What are the benefits?
The main advantage is that it allows greater lengths compared to triaxial or coaxial cable without increasing weight or sacrificing flexibility. The central strength member provides the necessary durability for continuous use.
Where is it used?
This connectivity solution is suitable for transmission in arenas, stadiums or sport events and big installations where long cable runs are required.
Examples of professional cameras using SMPTE 304/311::
Alexa Fiber Remote, JVC GY-HM790, Sony cameras with HDCU-2500…
