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Industry News

Systems

October 1, 1999
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Systems

Multiple Output 350 W Power Supply
The model NT350 compact, multiple output 350 W power supply provides a 3.3 V high current main output and active input power factor correction (PFC). The PFC input stage is followed by a two-transistor forward converter, which provides a proven architecture for high reliability requirements. The NT350's output configurations were developed to support applications in which the circuitry has largely migrated from 5 to 3.3 V. All outputs are fully isolated and regulated and active current sharing is standard to simplify N+1 redundant requirements in fault-tolerant applications. Auxiliary outputs are designed to sustain high surge current demands to support fan and disk drive spin-up requirements. Other features include power fail warning, remote inhibit and remote sense. Price: from $370 (100).
C&D Technologies, Power Electronics Division,
Tucson, AZ
(800) 547-2537.

Redundant Relay Fed LMDS Transmitter
The model TR280120RR local multipoint distribution system (LMDS) transmitter features multichannel block conversion operation, fully redundant throughput and synthesized local oscillators. The transmitter is designed to operate in the 27.5 to 28.5 GHz frequency range and consists of all necessary signal conditioning equipment to upconvert two blocks of video or data channels to the LMDS band and transmit the 1 GHz block at power levels that will provide a range of 5 to 8 km with 0.999 availability, depending upon the rain zone and required carrier-to-noise ratio. Superior performance is achieved by using field-proven RF circuitry and synthesized oscillators phase locked to a rubidium master reference. Optional antennas are available with patterns ranging from 30° to 360° azimuth coverage in either vertical or horizontal polarization.
mm-Tech Inc.,
Eatontown, NJ
(732) 935-7150.

Automated Harmonic Tuner
The model MT999 precision automated harmonic tuner designed for harmonic load pull or tuning measurements is capable of presenting a high mismatch over a broad frequency range of 0.8 to 7.5 GHz. The tuner also provides a highly accurate and cost-effective method for device characterization where harmonic tuning is required. SWR matching range is 50 (min), carriage step size is 625 microinches and position accuracy is +/-1 step. The tuner works with the company's MT986B24/26 harmonic tuner controllers and features power handling of 10 W CW (0.5 kW peak). The high isolation between the fundamental and harmonic frequencies provided by multiplexers assures the accuracy of the harmonic measurements.
Maury Microwave Corp.,
Ontario, CA
(909) 987-4715.

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