User Manual

18 FAQs
222
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.
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, that is, 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 bands 5.4 GHz (ETSI Band B) and 5.8
GHz (ETSI Band C and FCC ISM band). This means that no license is required to operate the
PTP 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.