360 Systems MAXX, Руководство по эксплуатации

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Installation 19
Important Installation Notes
Operating Environment
A video server is the most critical element in a broadcast operation. Its installation should
safeguard it from every external event that can interfere with it doing the task expected of it. 360
Systems’ engineers have experience with thousands of installations, and have become aware of a
number of environmental factors that can adversely affect performance. Two of of these have
already been discussed: power conditioning and inadequate cooling. Two others, less obvious,
should also be considered:
RF Interference by Cel Phones
Many people are not aware that cel phones can attain a very substantial power output,
even when no conversation is taking place. You may have experienced the effect of a cel phone
interfering with a common desk phone placed nearby. Carrying a cel phone into a machine room
where it is in close proximity to broadcast equipment and its associated wiring is unwise. They are
able to interfere with serial control commands, video synchronization, and in some cases can crash
the CPU in equipment.
Some major broadcasters prohibit the carrying of cel phones into certain machine areas.
360 Systems believes that the risk of undesired equipment behavior from their RF fields is very real.
Static Discharge
Static electricity discharge is accepted by most people as an inevitable consequence of
living in a dry area. It is, rather, a result of floor coverings that may enhance appearances, but are
inappropriate for use around critical pieces of broadcast equipment. Static discharge can do two
adverse things:
•
Discharge into a connector can—and will—destroy internal circuitry of equipment. The result
will always be difficult to diagnose and repair.
•
Discharge to equipment frames or wiring can crash a CPU and take the station off the air. The
event may seem random or unrelated to static, but it is clearly a catastrophic event—and one
that can repeat indefinitely as humidity varies.
Several steps can be taken to protect equipment from static discharge:
•
Do not install critical broadcast equipment (video servers) in a room with carpeting.
•
Connect equipment racks directly to an earth ground with a heavy copper conductor.
•
Do not operate equipment with a lifted safety ground (green frame ground).
•
Install a humidifier to reduce the level of static discharge.