Quartz Q16/Q32 System Manual
18 May 2004 Issue 5.00 Page 17
In larger systems the extra processing power of the SC-1000 is often required. This is a separate 2U
controller that supports an optional backup controller and backup PSU. The large number of Q-Links
allows a system to be split into physical areas such as vision control, audio, production, and
engineering.
As a system design guide the SC-1000 should be considered when the router grows above 128x128
single level or has more than 10-15 total Q-Link devices. See section 6.10 for further information on
the SC-1000.
In large buildings or outside broadcast vehicles (OB trucks) the Q-Link system can be affected by
mains earth differences between physically remote areas. This causes currents to flow in the outer of
the Q-Link cable that can disrupt the Q-Link communications. To prevent this problem Quartz can
supply a SI-0004 Q-Link opto-isolator unit.
In large buildings the SI-0004 would only be installed once a problem had been identified. In OB
trucks it is good practice to install an SI-0004 between the internal Q-Link and any external ‘tail gate’
or bulk head patch panels. Multiple SI-0004 units can be used where several external Q-Links are
required.
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