User Manual

Carlson Wireless USA revision 2.12 PRO Page 2
LEGAL
i-WLL, the i-WLL logo , Trailblazer, the Trailblazer logo, Carlson Wireless
USA, and the Carlson Wireless logo are registered trademarks of Carl-
son Wireless Telephone Inc. Any trademarks, trade names, service
marks, or service names owned or registered by any other company and
used in this manual are the property of their respective companies. Copy-
right 1999, 2000, Carlson Wireless Technologies Inc. All rights reserved.
SCOPE OF ADDENDUM
This addendum is designed to support the installation, operation and
maintenance of the 24 dBi high gain parabolic grid antenna used in con-
junction with the i-WLL–Trailblazer All-Digital Remote Wireless Tele-
phone Link. To avoid harm to persons or damage to the product please
ensure that you have read through the safety, unpacking and installation
sections before proceeding.
R.F. SAFETY HAZARD WARNING
This equipment complies with FCC radiation exposure limits set
forth for an uncontrolled environment when installed as directed.
This equipment should be installed and operated with fix-mounted
antennas that are installed with a minimum of 2 meters of separa-
tion between the antenna and all persons body during normal opera-
tion
UNPACKING
Please note any damage to the box and report to shipper before opening.
The 24 dBi high gain parabolic grid antenna will arrive in one box approxi-
mately 36 x 30 x 8 inches (92 x 76 x 20 cm). Small amounts of feed cable
may also be included in this box if ordered.
Upon opening the box one will find a N to N 36 inch long cable taped to
the grid reflectors which are face down with corners padded. After remov-
ing the reflectors there will be a remaining box taped to the bottom. Inside
this box will be the mounting bracket, clamp and hardware, extension
tube, and dipole.
Carlson Wireless USA revision 2.12 PRO Page 3
INSTALLATION
Warning: It is the responsibility of the professional installer to ensure that
when using the outdoor antenna kits in the United States (or where FCC
rules apply), only the antenna configurations shown in the table below is
used. The use of any antenna other than those listed is expressly forbid-
den in accordance to FCC rules part 15.204.
Calculating the EIRP of an External antenna
The output of the I-WLL Trailblazer radio is calibrated at the factory to +16
dBm +/- 2 dB. It is not adjustable in the field. The 36 inch LMR 400 “N” to
“N” short cable allows the Trailblazer system to be located just behind the
antenna with losses totaling approximately 2 dB. The external antenna
sold by CWT has a gain throughout the 2.4 ISM band of 24 dBi.
Using this as an example one can calculate the following:
Given a radio maximum output power of 18 dBm - interconnecting cable
losses of 2 dB = total power arriving to antenna of 16 dBm. Now adding
the 24 dB Antenna gain of 24 dB = A total Effective Rated Power of 40
dBm.
The “3 for 1” FCC rule states that for every 3 dB above 6 dB of antenna
gain you must lower the maximum RF power available to the antenna
from +30 dBm by 1 dB. In this example the antenna gain is (24 – 6) 18 dB
above 6 or (18 / 3) or 6 times 3 dB above 6 dB. Checking to see if the
transmit power meets the rule is done by subtracting 6 from +30 dB equal-
ing +24 dBm. Following this guideline ensures compliance with the maxi-
mum transmitter ERP allowed with the antenna provided as a system.
"Professional Installers Only :
Detached antennas, should be installed ONLY by experienced antenna
installation professionals who are familiar with local building and safety
codes and, wherever applicable, are licensed by the appropriate govern-
ment regulatory authorities. Failure to do so may void the CWT product
warranty and may expose the end user to legal and financial liabilities."
"Regulations regarding maximum antenna gains vary from country to
country. It is the responsibility of the end user to operate within the limits
of these regulations and to ensure that the professional installer is aware
Antenna
Type
Gain (dBi) Gain Nu-
meric
Peak output
power
RF Exposure
distance (m)
Minimum RF ex-
posure dist. (m)
Patch 13.8 24 102.3 0.14 2
Grid 24 251.2 233.9 0.67 2