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Reliability Considerations
Since the commentary microphones and communications are typically provided by
this system, reliability is of primary concern. The ADX-series products are designed
with highest-quality components and conservative ratings so as to be as reliable as
possible.
In addition, after manufacture, the ADX products undergo an extensive burn-in
process which includes power and thermal cycling to attempt to precipitate out any
early-life failures.
Even with these precautions failures are not impossible, and in addition there are
other components to the system such as Ethernet switches which must also be
considered in evaluating the overall reliability question.
Here are some thoughts on insuring a reliable on-air system:
Provide a spare announce box and headset. This practice has been going
on for decades with analog systems, and it's still a good idea. It protects
against failure of the ADX-120 and the headset.
Use the ADX-8000 to provide power for the ADX-120s. This unit contains
redundant power supplies and will provide highly-reliable power, even in the
event of the failure of one of the supplies. The dual supplies also supply
redundant power to the switch itself.
Insure a reliable AC power source in the remote location for the ADX units
and for the Ethernet switch.
the AC supply you might consider using a small UPS power supply to provide
battery backup. A small 500 watt unit intended for personal computer use
will provide an hour or more of operation in the event of power failure.
Use reliable Ethernet hardware such as switches, fiber SFPs, etc.
new switches for a few days before putting them on the air.
Ethernet cables and fiber in good condition.
Many switches have two or more fiber SFP ports available. If the switches
support this type of operation (trunking), and most do, two fiber runs could be
connected between switches, thus protecting against fiber and SFP failure.
The ADX-8000 switches support trunking and are compatible with most
generic layer 2 switches.
It is possible to have a fully-redundant network operating in parallel with the
primary network. This of course requires two switches at each location, but
provides a very high degree of reliability at moderate additional cost. Contact
Lance Design for more information about this type of operation.
(continued)
If there is any question about the reliability of
17
Burn in
Keep all
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