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We prefer Southwest Microwave 310B's because of the reliability and confidence factors. We don’t worry about nuisance alarms caused by unpredictable sidelobes in other microwave sensors. -Michael Johns, Titan Security

Model 310B
Long Range Microwave Link

Because Model 310B operates at K-band frequency (24.125 GHz), it achieves performance not possible with X-band microwave links (which operate at 10.5 GHz). Antenna beamwidth is approximately 3.5 degrees in both the horizontal and vertical planes, allowing Model 310B to operate at long ranges and within narrow corridors.

Each Model 310B Transmitter and Receiver is packaged in weatherproof housings which are only 269 mm (10.6 in) in diameter and weigh only 2 kg (4.5 lbs). Comparable X-band systems require housings which are 609 mm (24 in) in diameter and weigh 15.9 kg (35 lbs). This small size provides optimum resistance to wind-loading and obvious advantages for installation and shipping.

Because K-band microwave frequency is 2.5 times higher than X-band, the multipath signal generated by an intruder is also 2.5 times higher and detection of slow-moving intruders is correspondingly better. With its superb beam control and higher multipath frequency, Model 310B provides unmatched detection performance.

Phase Locked Loop (PLL) signal processing in the receiver increases detection probability by alarming on partial or complete beam interruption, increase or decrease in signal level or jamming by other transmitters. An Automatic Gain Control (AGC) circuit permits the receiver to compensate for varying site conditions or changes in the weather.

Operating at K-band, which is much less crowded than X-band, Model 310B is inherently less susceptible to outside interference from airport landing systems, aircraft or marine radar, and other microwave intrusion systems. Four field-selectable modulation channels with narrow band PLL filters allow several Model 310B’s to operate simultaneously without mutual interference. Model 310B can also be stacked with an X-band link, such as Southwest Microwave’s Model 300B, with no danger of mutual interference. This arrangement provides the ultimate in detection performance and extremely high resistance to electronic jamming.

Model 310B is set to retire on December 31, 2022. Visit the Retirement Notice for details or learn about the digital sensor replacement, Model 336.