User Manual

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™

Industries

DS4

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Speed, Direction, & Range Sensing Radar

Specifications

And

User’s Guide

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or by any means – graphic, electronic, mechanical, including photocopying, taping, or information

storage and retrieval systems – without the written permission of MPH Industries, Inc.

Summary of content (6 pages)

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™ Industries ™ DS4 Speed, Direction, & Range Sensing Radar Specifications And User’s Guide Copyright 2005, MPH Industries, Inc. No part of this work, covered by the copyrights hereon, may be reproduced or copied in any form or by any means – graphic, electronic, mechanical, including photocopying, taping, or information storage and retrieval systems – without the written permission of MPH Industries, Inc.
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I. DS4 Description and Operation The MPH Industries, Inc. DS4 Radar Sensor is designed for DOT agencies to measure the speed, direction, and range of motor vehicles and communicate via RS-232 to a PC, data logger or some other data storage or display device. The DS4 reports the target vehicle’s velocity (speed and approaching or receding direction) and range of the strongest reflected signal.
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B. C. PHYSICAL CHARACTERISTICS Connector: 8 Pin Circular Weather tight Physical Size: Weight Depth Width Height = 3.0 lb. (1.36 kg) = 2.5" (6.4cm) = 6.0" (15.2 cm) = 8.75" (22.2 cm) MICROWAVE CHARACTERISTICS The DS4 unit has separate transmit and receive antennas. The transmit antenna has a broad beam width and illuminates targets in a wide field. Operating Frequency: K band: 24.15 GHz Modulation: Square wave 48.25 KHz.
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MPH DS4 Radar Interface Protocol Document 1. Speed Packet Protocol The DS4 Radar message packet consists of 7 bytes @ 1200 baud, no parity, 8 data bits, 1 start bit. Messages are paced at 250mS intervals and are sent whether there is a target or not. Char 1 2 3 4 5 6 7 Description Status Not used Approaching Target Reserved Target Range/10 Start of message Radar status, as defined below Speed values below 4 are treated as zero. Values below 4 are treated as zero End of message 1.1.
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2. Recommendations for remote displays (sign boards) or data loggers. • • • Look at the Approaching Target byte. If it is 4 or above, display it. If messages are not arriving, blank screen after a few seconds. The radar is probably off, or not connected. Displaying the difference between the sign receiving a speed of zero and not receiving a message at all is recommended. This makes troubleshooting easier. We display a dot if communications are working properly. 3.
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MPH INDUSTRIES, INC. A SUBSIDIARY OF MPD, INC. 316 EAST NINTH STREET OWENSBORO, KY 42303 1-888-689-9222 FAX: (270) 685-6288 HOURS: MONDAY-FRIDAY 8:00AM – 4:30PM (Central Time Zone) Part No.