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Industry News

SYSTEMS

April 1, 1998
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SYSTEMS

38 GHz mm-wave Radios
The MicroStar" Plus 38 series point-to-point digital radios operate in the 38 GHz frequency band for voice/data applications and can accommodate DS3 traffic. The outdoor RF unit with integrated flat antenna is connected to the indoor unit with a single coaxial cable. The units offer a wide choice of features suitable for cellular networks, PCS networks and wireless competitive access providers. An offset QPSK modulation scheme and integrated forward error correction ensure a high system gain, better spectrum utilization and increased path reliability. Additional features include system gain of up to 97 dB, antenna gain of 38 or 44 dBi, transmitter RF power attenuation of 40 dB (in 1 dB steps), frequency stability of 5 ppm (including aging) and receiver noise figure of 8 dB (max) at antenna port.
Harris Corp.,
Redwood Shores, CA
(415) 594-3000.

2.44 GHz Digital Microwave Radio System
The model 7000 unlicensed, spread spectrum, 2.44 GHz digital microwave radio system provides a highly stable, reliable medium-to-short-haul digital link for one to four DS1 lines with an extended operating temperature range for outdoor site use. Operating over path lengths up to 15 miles, the system is especially suited for short-haul transmission links, spur route feeders, cellular site interconnections, urban and campus environments, fast turn-up circuits, emergency restoration and local area networks. The model transmits and receives up to 96 pulse code modulation (PCM) (four DS1 circuits) or 192 adaptive differential PCM voice channels. AMI or B8ZS line codes are field selectable. The system provides two EIA232D interfaces and up to 655 feet of DS1 DSX cable equalization.
Larus Corp.,
San Jose, CA
(408) 494-1500.

Path Loss Measurement System
The models PTX ISM and PTX SMR transmitters and receivers are part of the company’s PathTrax series path loss measurement system, which is a user-friendly, microprocessor-based system that measures signal strength, path loss and shielding effectiveness within wireless communication networks. The transmitter and receiver are offered individually or in combination. The model PTX ISM operates from 864 to 936 MHz and the model PTX SMR operates from 805 to 895 MHz.
Chesapeake Microwave Technologies Inc.,
Glen Rock, PA
(717) 235-1655
.

In-building CDMA Repeater
The model R1910C in-building PCS CDMA repeater offers an efficient and economical means of providing indoor coverage. The repeater features an output power of 150 mW (CDMA), filter bandwidth of 1.25 MHz, noise figure of 6 dB (typ) and gain range of 40 to 70 dB. Operating temperature range is from –10° to +45°C.
Watkins-Johnson Co.,
Palo Alto, CA
(800) 951-4401.

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