Grass Valley LDK 4488 - Manual (Page 36)

36 LDK 4488, LDK 4489 SuperXpander, Xpander User’s Guide (v5.0)
Chapter 5 - Power
The following table gives an approximation of the maximum Triax cable length versus utility
power consumption (the nominal SuperXpander/Xpander system power consumption is
already taken into account for these values).
Fiber cable lengths
The maximum length of cable that can be used without significant degradation of the video
signal is 4,000 m (13,000 ft).
– Overall fiber cable length highly depends on the optical budget, determined mainly by
the number of optical transitions (interconnections).
– The hybrid fiber cable length is also limited by the total amount of power drawn by the
SuperXander/Xpander system, including camera, viewfinder and utility power.
5.3 Local power mode
When power is provided at the mains connector, the SuperXpander/Xpander automatically
switches to local power mode. The local power active indicator lights to indicate that power is
being supplied via the mains connector.
Local power mode is recommended for high power situations and/or long Triax cable runs. As
an addition to the Triax infrastructure an LDK 4800 Triax repeater unit can be used to extend
Triax cable lengths.
☞
Note
When the SuperXpander/Xpander is used in local power mode the utility power is not available.
☞
Note
Local power mode is not fully supported when using the SuperXpander/Xpander in a Fiber
configuration. Power to the camera is still supplied by the base station while the
SuperXpander/Xpander itself and the viewfinder are powered locally.
Utility power: Triax cable (8 mm) Triax cable (11 mm) Triax cable (14 mm)
0 VA 430 m (1,400 ft) 860 m (2,820 ft) 1,720 m (5,640 ft)
25 VA 360 m (1,180 ft) 720 m (2,360 ft) 1,450 m (4,760 ft)
50 VA 300 m (980 ft) 610 m (2,000 ft) 1,220 m (4000 ft)
75 VA 260 m (850 ft) 520 m (1,700 ft) 1,030 m (3,380 ft)
100 VA 220 m (720 ft) 440 m (1,440 ft) 870 m (2,850 ft)
120 VA 190 m (620 ft) 380 m (1,250 ft) 760 m (2,500 ft)