A Broadband Wireless Access MMDS Transmitter Manufacturer and Systems Company
Melchor Muzquiz, Mexico. Loma Scientific International, recently completed installation of a 31 Channel MMDS System in this Latin American City. Initial field installations show
excellent coverage, with more than adequate signal to noise ratio over 90% of the
operating geography. The success story is primarily based upon two of Loma's advanced broadband multicarrier transmitters, the LSI-28STE, employed in a dual mode. Each transmitter has its own transmission line and high gain broadcast antenna, carrying 15 to 16 channels (each) and offers flexibility in channel assignments. Other features include simple operation, low CTB, and low cost of ownership. Maintenance is easy, and an emergency fail-safe mode is feasible. That is, in the event of a transmitter failure, 15 to 16 channels will still be on air, or all 31 can be emergency duplexed into one transmitter with only a 6dB reduction in power. With the use of fixed frequency modulators for very low phase noise the system is still agile.
Because of its broadband nature, modulators can be changed with little or no down time.
San Francisco, CA, USA. Loma's digital headend transmitters and receivers (see Products: LSI 100D Series) are externally duplexed and share common broadcast antenna sectors. This headend location serves a super cell out to 40 miles over the San Francisco Bay Area. Subscriber transceivers (see Products: LSI 350STR Series) with greater than 1 watt output, provide upstream data over the 40 mile return path. A design requirement for single subscriber site antennas is accomplished by incorporating internal duplexers with high order reject filtering. "QOS, reliability and subscriber satisfaction have been exceptionally high" in this 2.3-2.5GHz band, as reported by numerous users. User satisfaction over two years in Silicon Valley, with innumerable choices for a jaded populace, is the highest endorsement possible.
Caribbean Nation. Similar to San Francisco, CA above, high power, digital transmission equipment (see Products) is now in service in the 3.4-3.7GHz band. Advanced planning is now underway to extend the two-way, high-speed, Broadband Wireless Access network throughout this nation in the Caribbean.
Pacific Islands. Similar to San Francisco, CA above, high power, digital transmission equipment (see Products) is now in service in 2.5-2.7GHz band on one island nation. The design is complete and implementation has commenced on another island in the 470-800MHz, UHF band. Both nationwide systems will provide Wireless Internet, IP telephony and streaming video to the populations at large.
Paraguay, SA. Loma Scientific International is very pleased to announce the completion of the design, construction and furnishing of all transmission equipment for the first two MMDS systems in the sovereign nation of Paraguay:
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