Applications / Environment of use
ASL Pro Series equipment is designed for use as a
wired communications system in theatres, in Radio/TV
production facilities, in factories, and in utilities com
plexes such as airports, railway stations and coach
terminals.
ASL equipment can be used outdoors in normal
weather conditions. In conditions with excessive cold
(<-10° C), heat (>50° C) or humidity (>85%), ASL
equipment might not perform properly.
ASL equipment is not designed to be used under
water, or in situations where explosion safe equipment
is specified by authorities.
Emission
ASL Pro Series equipment does not generate high fre
quency (HF) signals. An ASL power supply can
generate a weak magnetic field caused by the power
transformer. To avoid possible negative affects, keep
ASL power supplies at a safe distance from equipment
which is very sensitive to magnetic fields.
Immunity
ASL Pro Series is designed on the base of low
impedance signal transport. User stations and power
supplies are to be connected via low capacity cabling
with an overall screen (also see Cabling section).
Therefore, HF signals are adequately rejected to
maintain an intelligible communication, unless strong
electro-magnetic fields (exceeding 3 V/m) are in the
direct vicinity of the interconnecting cables.
ASL 19" rack mount units are housed in a 1 mm steel
enclosure (closed construction), which offers, by
nature, the highest possible rejection of electro-
magnetic fields
ASL speaker stations (PS 130/230/430) are housed in
an enclosure made of 1 mm steel with ABS side
panels, which offers adequate rejection of electro-
magnetic fields.
ASL beltpacks are housed in an ABS enclosure and
are slightly more sensitive to electro-magnetic fields.
Negative effects in the performance of beltpacks can
be avoided when keeping them at a safe distance from
equipment which might radiate strong electro-magnetic
fields, such as transmitters antennas and dimmers.
14.0 DESIGN CRITERIA
18 User Manual PS 4379 - Issue 1 © 2007 ASL Intercom, Utrecht, The Netherlands
(11 pages)
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