The Canford fibre optic multiplex transport system lowers the cost of distributing digital video and simplifies and extends cable systems by multiplexing up to sixteen SDI signals over a single SM optical fibre. Transceiver units are housed in 1U cases.
It provides transport of eight SDI signals (3G , HD, and SD, with embedded audio and data), over a single optical fibre, four channels in each direction. All SDI ports are fully re-clocked automatically, with automatic rate detection, so that jitter caused by long coaxial runs will not affect the maximum optical run-length and vice versa. Cable equalisation is also automatic. Systems are available in the lower optical band; this avoids water peak wavelength to give maximum optical reach over conventional fibre (ITU-T G.625 A&B).
The front panel has an OLED screen which displays optical power, SDI signal presence, temperature and system voltages. Alarms can be set up to trigger an audible tone or relay contact-closure, giving peace of mind when it comes to detecting and resolving distance, grounding and interference issues.
The system has been used extensively in the field by one of Europe's largest OB facilities providers at events including the London Olympics and Royal Jubilee celebrations.
Both AC and DC power inputs are provided for flexibility and power redundancy.
Connectors:
SDI: 75 ohm BNC, to IEC 60169-8 amendment 2.
Optical: ST (IEC 61754-2).
AC power inlet: C14 (IEC 60320). DC power inlet: 4-Pin XLR.
Alarm relay: 3-way detachable locking screw terminal.
Technical Specification
SDI
SDI data rates: 270Mbps, 1.485Gbps, 2.97Gbps. Return loss: Better than 15dB to 1.485Ghz, 10dB, 1.485GHz-2.97GHz. SDI Signal Level: 800mV p-p +/-10%. Typical cable length equalisation for Belden 1694A: 450m at 270 Mbps, 200m at 1.485 Gbps, 150m at 2.970 Gbps.
Optical
Spectral grid: ITU-T G.694.2. Channel spacing: 20nm.
Wavelengths:
Lower band (O,E): 1271, 1291, 1311, 1331, 1351, 1371, 1431, 1451nm.
Output power: +2dBm typical. Receiver sensitivity: -22dBm typical. Receiver overload: +2dBm typical. Optical source: DFB laser. Optical detector: PIN junction photodiode.
General
Power source: 100-240V AC 50/60Hz, 9V - 36V DC. Power consumption: 20W. Dimensions: 483mm x 155mm x 44 (l x d x h) mm; 1u rack mounting, 155mm deep. Weight: 1.7kg.
Ordering note:
These units are supplied in pairs, in order to provide a complete system. Cable is not included.