Ballinger Technology Pty Ltd  

Design, Distance, Speed, Vehicle Counting

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Traffic Speed Sensor

When the application requires a radar with both moving and stationary capabilities, the Traffic Speed Sensor is the natural choice. Though not intended for use in enforcing speed laws in the U.S., the Traffic Speed Sensor has all the features of a world-class traffic radar built in.

While the Traffic Speed Sensor has features that are normally seen in law enforcement Traffic Radar, such as speed locking and Doppler audio output, it is the perfect speed sensor for any application requiring monitoring road traffic speed or speed management in a mobile environment.

Traffic Speed Sensor Applications

Features of the Stalker Traffic Speed Sensor

Microwave Specifications


Conical horn



3DB Beamwidth

12° +/-

RF Source

Gunn-Effect diode

Receiver Type

Two Direct-Conversion Homodyne receivers using four low-noise Schottky battier mixer diodes

Power Output

10 mW minimum

15 mW nominal

25 mW maximum

Power Density

1 mW/cm2 maximum at 5 cm from lens

General Specifications


Moving/Stationary Doppler Radar Speed Sensor

Operating Frequency

34.7 GHz (Ka-Band)


+/-100 MHz

Communication Interface


Power Requirements

Voltage: 9-16 VDC for SN ST6560 and below

9-24 VDC for SN ST6561 and above

Current: (at 12 VDC nominal)

Transmitter on: 370 mA

Transmitter off: 100 mA


Operating: -30° to +70°C, 90% relative humidity

Non-operating: -40°C to +85°C


Weight:  1.15 lb. (0.52 kg)

Diameter:  2.6 in. (6.7 cm)

Length: 4.7 in. (11.8 cm)

Case Material: Aluminum Die Cast


+1, -2 MPH stationary, +2, -3 MPH moving

+1, -2 KPH stationary, +2, -3 KPH moving

Audio Output

A 3.3 Vpp pulse-width modulated (PWM) audio output signal is provided - must be filtered and amplified for best audio quality.

Auto Self-Test

Performed every 10 minutes while transmitting

Speed Range

Stationary low speed threshold configurable:

1 MPH to 200 MPH (1.6 to 321 KM/H)

12 MPH to 200 MPH (19 to 321 KM/H)

Moving Speed Range

Patrol speed –

Low patrol acquisition threshold configurable:

Standard acquisition of 1 to 90 MPH (8 to 144 KPH), when Patrol Lo Cutoff = Low

Optional acquisition of 20 to 90 MPH (32 to 144 KPH), when Patrol Lo Cutoff = High

Patrol speed, once acquired, will track to 199 MPH (320 KPH)

Opposite lane target speed - 200 MPH Max combined closing speed (321 KPH)

For 5 MPH (8 KPH) patrol speed: 20 MPH to 195 MPH (32 to 313 KPH)

For 70 MPH (112 KPH) patrol speed: 35 MPH to 130 MPH (56 to 209 KPH)

Same lane target speed – Related to patrol speed:

±70% of patrol speed within 5 MPH (8 KPH) of patrol speed

i.e. For 50 MPH: 16→45 MPH and 55→85 MPH

( For 80 KPH: 25→72 KPH and 88→136 KPH) Same lane patrol speed must be greater than 16 MPH (25 KPH).

Control and Configuration settings

Basic Configuration

Transmitter Control



Unit of Measure

Unit Resolution

Faster Target Tracking

AUX Pin Configuration

Serial Port Configuration

Baud Rate

Output Format

Leading Zero Character

Message Period

Target Recognition

Opposite Lane/Stationary Sensitivity

Same Lane Sensitivity

Fine Sensitivity Adjust

Patrol Speed Blank

Target Filtering

Stationary Low Cutoff

Patrol Speed Low Cutoff

Double Suppression

Max AGC Gain

Min AGC Gain

Current AGC Gain

Speed Presentation

Holdover Delay

Locking Targets

Lock Option

Faster Locking Enable

Strongest Lock

Fast Lock

Patrol Speed Blank

Speed Alarm

Alarm Speed Threshold


Doppler Audio Volume

Aud 0 Enable

Variable Doppler Loudness


Beep Volume


Fork Enable

Auto Test Period

Auto Test Mode

Enhanced Test


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