2. Installation
2.1 Parallel
Decode
Dataradio's proprietary patent-pending Parallel Decode(tm) technology combines Spatial Diversity and
Smart Combining to provide increased sensitivity plus immunity to multipath fading. Even in the ab-
sence of motion, the changing wavelengths inherent in frequency-hopping systems makes it possible for
stationary sites to experience frequency-selective interference. Parallel Decode technology receives and
continuously combines signals from two antennas a short distance apart, ensuring a more reliable link.
The dual antenna connections also permit the use of a higher-gain antenna for the receiver. Full 1W
transmit power can be used with up to 6 dBi antenna gain.
Dual antenna ports also permit listening to a far distant site with a high- gain antenna while using an omni
to serve local stations. The Parallel Decode receiver algorithm automatically and continually decodes sig-
nals from both antennas.
In special applications such as rotating machinery, dual antenna ports allow the use of cross-polarized
antennas, automatically selecting the best signal regardless of the orientation of the machine.
2.2 Antennae
Installation
2.2.1 Professional Installation & RF Exposure Compliance Requirements
The HiPR-900 radiomodem is intended for use in the SCADA market. The HiPR-900 must be profession-
ally installed and must ensure a minimum separation distance of more than 9.06 in. (23 cm) between the
radiating structure and any person. An antenna mounted on a pole or tower is the typical installation and
in rare instances, a 1/2-wave whip antenna is used.
The HiPR-900 radiomodem uses low power radio frequency transmitter. The concentrated
energy from an antenna may pose a health hazard. People should not be in front of the an-
tenna when the transmitter is operating.
RF Exposure
The installer of this equipment must ensure the antenna is located or pointed such that it does not emit an
RF field in excess of Health Canada limits for the general population. Recommended safety guidelines for
the human exposure to radio frequency electromagnetic energy are contained in the Canadian Safety
Code 6 (available from Health Canada) and the Federal Communications Commission (FCC) Bulletin 65.
Proper installation of the transceiver antenna of HiPR-900 products, as summarized in section 2.2.2 be-
low, will result in user exposure substantially below the recommended limits for the general public.
The HiPR-900 complies with Part 15 of the FCC rules and must be professionally installed. Operation
must conform to the following two conditions:
• This device may not cause harmful interference.
• This device must accept any interference received including interference that may cause unde-
sired operation of the device.
Notes:
Any changes or modifications not expressly approved by the party responsible for com-
pliance (in the country where used) could void the user's authority to operate the equip-
ment.
120 40515-100a
HiPR900 User Manual
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