User Manual

2
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. The DS4 utilizes the
legally accepted microwave doppler shift principle and has performance characteristics compliant
for use under Part 15 of the US FCC regulations and with the European RTTE harmonized
standards for this class of equipment.
The DS4 is a self contained module consisting of a Gunn oscillator transmitter, a transmit and
receive antenna, and an integral signal processing unit. It is housed in a NEMA type enclosure
with one eight pin circular connector through which all of the power and communications pass.
Cable termination configurations include “flying leads” and a DB9 type of connector. The module
is not waterproof, but can be modified to use for outside locations in a fixed mounting
configuration with the addition of a sealed radome over the antennas. The DS4 standard
configuration outputs the strongest approaching target within a preset range of 600 feet. Special
configurations with ranges up to 1000 feet can be made with variations in the software modules
installed at the time of manufacture, but field change in configuration is not an option.
A. SYSTEM SPECIFICATIONS
Power Requirements & Voltage: 10.8 Vdc-16.5 Vdc (13.6 Vdc Nominal)
Low Voltage Brown-out: Input voltage 7.0 < Vinput < 10.8 VDC: Transmitter
disabled and Low Voltage status bit enabled
Input voltage < 7.0 entire unit disabled.
Current: 0.25A nominal @ 13.6V input voltage
Target Detection Speed: 6 to 110 mph (10 to 193 km/h)
Speed Accuracy: +/- 1 mph (+/- 2 km/h)
Target Range: <= 1000 feet (328 meters)
Range Accuracy: +/- 30 feet (+/- 9 meters)
Operating Temperature Range: -30°C (-22°F) to 60°C (+140°F)
Operating Humidity Stability: Operates normally up to at least 90% relative
humidity at 99°F (37°C).