A8520E24A91 – Users Manual
Page 17 of 28
Release Date: Dec 27
th
2010
For more information see: Industry Canada
http://www.ic.gc.ca/
3.2.2. RF Exposure
All transmitters regulated by IC must comply with RF exposure limits as set forth in RSS-102,
Issue 4, section 4, “Exposure Limits”. Furthermore RSS-102, Issue 4, Section 2 “Certification
Requirements”, provides assistance in determining the specific requirements for compliance. If
appropriate, compliance with exposure guidelines for mobile and unlicensed devices can be
accomplished by the use of warning labels and by providing users with information concerning
minimum separation distances from transmitting structures and proper installation of antennas.
The following statement must be included as a CAUTION statement in manuals and OEM
products to alert users of IC RF Exposure compliance:
Notice: To satisfy IC RF Exposure requirements for mobile and base station transmission
devices, a separation distance of 20 cm or more should be maintained between the antenna of
this device and persons during operation. To ensure compliance, operation at closer than this
distance is not recommended. The antenna(s) used for this transmitter must not be co-located
or operating in conjunction with any other antenna or transmitter.
Avis: Pour répondre à la IC d'exposition pour les besoins de base et mobiles dispositifs de
transmission de la station, sur une distance de séparation de 20 cm ou plus doit être maintenue
entre l'antenne de cet appareil et les personnes en cours de fonctionnement. Pour assurer le
respect, l'exploitation de plus près à cette distance n'est pas recommandée. L'antenne (s) utilisé
pour cet émetteur ne doit pas être co-localisés ou fonctionner conjointement avec une autre
antenne ou transmetteur.
If the A8520E24A91 module is used in a portable application (antenna is less than 20 cm from
persons during operation), the integrator/OEM is responsible for performing Specific Absorption
Rate (SAR) testing in accordance with IC rules and methods of RSS-102.
3.3. Potential
Interference Sources
The two main mechanisms that allow a PurePath wireless system to co-exist amicably in close
proximity to other 2.4 GHz radio systems are:
The adaptive frequency hopping scheme described in section 2.4.3 that ensures that RF
channels used by other radio systems are avoided
Adaptive listen-before-talk mechanism that measures energy in RF channel before
transmitting and avoids transmitting if the channel is already in use
These mechanisms together ensure that other radio systems are minimally impacted by a
PurePath Wireless audio network in normal circumstances. However, since a low-latency audio
network by its very nature transports a very time-critical data stream, both mechanisms have
