Wireless Link - OTC D750 Instrucciones De Funcionamiento

en 20 | D750 | Symbols used
2.5

Wireless link

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D750 users are responsible for compliance with the
applicable directives and restrictions in the country
concerned.
2.5.1 Important information on
WLAN and Bluetooth
WLAN (Wireless Local Area Network) is the term used
to describe a wireless local network. Like Bluetooth,
WLAN provides a wireless link on the free 2.4 GHz ISM
band (ISM: Industrial, Scientific, Medical). This frequen-
cy range is subject to state legislation, can however be
used without a license in most countries. Consequently
a large number of applications and devices employ this
frequency band for transmission. This can result in fre-
quency interference.
Depending on ambient conditions, the WLAN link may
therefore deteriorate, e.g. in the case of Bluetooth links,
cordless telephones, radio-controlled thermometers,
radio-controlled garage door openers, radio-controlled
light switches or radio-controlled alarm systems.
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Extreme caution is to be taken if wearing pacemak-
ers or other vital electronic devices when using wire-
less systems, as proper functioning of these items
could be impaired.
Pay attention to the following to ensure the best pos-
sible connection:
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The WLAN signal always tries to find the most direct
path. When setting up the PC/Laptop and access
point (see Sec. 2.5.2), make sure there are as few
obstacles as possible (e.g. steel doors and concrete
walls) which could interfere with the signal from and
to the D750.
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Inside buildings, the range of the WLAN is also
greatly influenced by the construction materials
used. Conventional masonry, wooden walls and vari-
ous types of dry construction wall scarcely impair
the propagation of radio waves. Thin gypsum walls
are however problematic, as considerable amounts
of moisture may accumulate in the gypsum and
result in the absorption of radio signals. Metal walls
and concrete (in particular reinforced concrete)
largely block out radio waves. Cellar ceilings are
often impenetrable. Generally speaking, walls with
a lot of installed metal (e.g. pipes, wires) obstruct
radio waves.
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Radio reception is also impeded by large metal
objects such as radiators and window frames as well
as active sources of interference such as radio tele-
phones, motion detectors and microwave ovens.
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Human beings are also an obstacle to wireless trans-
mission. It must therefore always be ensured that
no-one stands between the transmitter and receiver.
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We advise having the network infrastructure in-
stalled and maintained by a network specialist.
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Keep the SSID and the codes for the wireless link
in a safe place. Make sure these data are readily to
hand in case faults occur.
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We recommend a thorough inspection of the prem-
ises on commissioning: Establish where in the build-
ing the D750 works properly and where the operat-
ing limits are.
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If the D750 is used inside a vehicle (Faraday cage),
wireless communication may be severely impeded.
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The wireless link is affected by weather conditions.
The reception signal may therefore vary.
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Please contact your network specialist for any que-
ries.
2.5.2 Notes on access point (WLAN)
An access point is an electronic device which acts as
an interface between a wireless network and a cable-
connected computer network. It provides a wireless
connection between the D750, the PC/Laptop and a
printer.
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We recommend using WLAN standard IEEE 802.11n
(data transmission rate max. 600 Mbps) for the
access point. The "extended range" function is not
supported.
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The WLAN configuration always depends on the con-
figuration of the access point available.
Heed the following:
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The access point should be located as centrally and
high up as possible, ideally under the ceiling. The
access point is not to be installed behind any metal-
lic objects, such as radiators or in a metal switch
cabinet.
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If there is only one access point antenna, this should
face downwards towards the floor. If an access point
has several antennas, these should be in three-
dimensional arrangement.
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The best and highest transmission rates are always
achieved if there is visual contact between the D750
and the access point.
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In the event of a weak link it may be useful to
change the channel set on the access point. Where
possible avoid employing channels adjacent to those
already in use.
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It is advisable to configure wireless communication
encoding at the access point.
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