User's Manual

Canopy 900 MHz AP and SM User Guide
Issue 2 August, 2004 Page 2 of 16
NOTICES
Important Note on Modifications
Intentional or unintentional changes or modifications to the equipment must not be made unless under the express consent of the party
responsible for compliance. Any such modifications could void the user’s authority to operate the equipment and will void the
manufacturer’s warranty.
U.S. Federal Communication Commission (FCC) and Industry Canada (IC) Notification
This device complies with part 15 of the U. S. FCC Rules and Regulations and with RSS-210 of Industry Canada. Operation is
subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any
interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the U.S. FCC
Rules and with RSS-210 of Industry Canada. These limits are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in
accordance with these instructions, may cause harmful interference to radio communications. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment on and off, the user is encouraged to
correct the interference by one or more of the following measures:
• Increase the separation between the affected equipment and the unit;
• Connect the affected equipment to a power outlet on a different circuit from that which the receiver is connected to;
• Consult the dealer and/or experienced radio/TV technician for help.
This device has been certifed with Industy Canada to operate with an antenna having a maximum gain of 10 dBi. Using an antenna
having a higher gain is strictly prohibited per regulations of Industry Canada. The required antenna impedance is 50 ohms. To reduce
potential radio interference to other users, Industry Canada requires the antenna type and its gain be chosen so that the equivalent
isotropically radiated power (EIRP) is not more than that required for successful communication.
FCC IDs and Industry Canada Certification Numbers are listed in the following table:
Module
Types
Operating Frequency
Range
RMS Power
Reflector or Antenna
FCC ID
Industry Canada
Certification
Number
SM AP
ISM 902 to 928 MHz
Up to 0.4 W
(26 dBm)
Maxrad Model # Z1681, flat panel
with 10 dBi gain
Mars Model # MA-IS91-T2, flat
panel with10 dBi gain
MTI Model #MT-2630003/N, flat
panel with 10 dBi gain
ABZ89FC5809
109W-9000ISM
Exposure Note
The antenna of a Canopy 900 MHz module must be installed to provide a separation distance of at least 60 cm (approx 24 inches)
from all persons. When so installed, the module’s RF field is within Health Canada limits for the general population; consult Safety
Code 6, obtainable from Health Canada’s website http://www.hc-sc.gc.ca/rpb. Per Health Canada Safety Code 6, the installer of this
radio equipment must ensure that the antenna is located or pointed such that it does not emit RF field in excess of Health Canada
limits for the general population.
Currently certified 900 MHz antennas have an antenna gain of 10 dBi, which means they are limited to a maximum RMS power of 0.4
W (26 dBm) to remain within the regulatory limit of 4 W (36 dBm) for the 900 MHz frequency band.
The applicable power density exposure limit for radios operating in the 900 MHz frequency band is 6 Watt/m
2
, according to the FCC
OET Bulletin 65, the ICNIRP guidelines, and the Health Canada Safety Code 6. The corresponding compliance distances referenced
above have been determined by assuming worst-case scenarios. The peak power density (S) in the far-field of a radio-frequency source
with rms transmit power P and antenna gain G at a distance d is
2
4 d
GP
S
π
⋅
=
In the case of a 900 MHz Canopy SM or AP with an antenna gain of 10 dBi (a factor of 10) and correctly entered in the user interface
as a 10 dBi antenna, the peak power density equals the exposure limit at a distance of 23 cm. A power compliance margin of nearly 7
times is artificially introduced by setting the distance to 60 cm.
The compliance distance is greatly overestimated in these cases because the far-field equation neglects the physical dimension of the
antenna, which is modeled as a point-source.
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