Motorola MOTOWI 4, Руководство пользователя

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FAQs
194
18 FAQs
Can I source and use my own PoE adaptor with the 500 Series bridge? No. The 500
Series bridge uses a non-standard PoE configuration. Failure to use the Motorola supplied Power
Indoor Unit could result in equipment damage and will invalidate the safety certification and may
cause a safety hazard.
Why has Motorola launched the 500 Series bridge? The 500 Series bridge is the first product
to feature Multiple-Input Multiple-Output (MIMO). The PTP 500 Series solutions allow wireless
connections of up to 200km (124 miles) in near line-of-sight conditions and up to 10km (6 miles)
in deep non-line-of-sight conditions.
What is Multiple-Input Multiple-Output (MIMO)? The 500 Series bridge radiates multiple
beams from the antenna - the effect of which is to significantly protect against fading and to
radically increase the probability that the receiver will decode a usable signal. When the effects
of MIMO are combined with those of OFDM techniques and a best in class link budget, there is
a significant improvement to the probability of a robust connection over a non-line-of-sight path.
What do you mean by “non-line-of-sight”? A wireless connection between two points without
optical line-of-sight, i.e., with obstructions between the antennas the transmitted signal is still able
to reach the receiver and produce a good quality link.
What else is special about the 500 Series bridge ?
There are many special features built-in
to the hardware of the 500 Series bridge. The product offers the highest system gain in its class
through high sensitivity antennas for improved signal recovery. It also features a Software Defined
Radio system that operates on ultra fast digital signal processors but is controlled by firmware
giving the ability to download new firmware when enhancements become available. The 500 Series
bridge has a built-in web server for advanced management capabilities including detailed radio
signal diagnosis.
In which frequency bands does the 500 Series bridge operate? The Motorola point-to-
point 500 Series bridge operates in the unlicensed 5.4 GHz (ETSI Band B) and 5.8 GHz (ETSI
Band C and FCC ISM band). This means no license is required to operate the 500 Series bridge.
Why does the 500 Series bridge operate in the 5GHz band?
The 5 GHz band offers the
dual benefits of high data throughput and good radio propagation characteristics. The wide band
of spectrum available is subdivided into several channels such that multiple systems can operate
in the vicinity without causing interference to one another.
Is the 500 Series bridge an 802.11a device? No, although similar, the 500 Series bridge uses
different encoding and radio transmission systems from 802.11a. In areas where 802.11a systems
are operating, the 500 Series bridge will detect the 802.11a radio signals and choose a clear channel
away from any interference.
How much power does the 500 Series bridge transmit? At all times the 500 Series bridge
operates within country / region specific regulations for radio power emissions. In addition, the
500 Series bridge uses a technique known as Transmit Power Control (TPC) to ensure that it only
transmits sufficient radio power such that the other antenna can receive a high quality signal.
How does the PTP 500 Series Bridge avoid interference from other devices nearby?
At initialization, the 500 Series bridge monitors the available frequency channels to find a channel