Ballinger Technology Pty Ltd  

Design, Distance, Speed, Vehicle Counting

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Stalker Stationary Speed Sensor

When measuring speed from a fixed position, the Stationary Speed Sensor  (radar) is the right choice. The Speed Sensor’s waterproof case allows it to be mounted in any outdoor location. Use it anywhere that speed measurement from a fixed location is the primary requirement.

Features of the Stalker Stationary Speed Sensor

Stationary Speed Sensor application

General Specifications


Stationary Doppler Radar Speed Sensor

Operating Frequency

34.7 GHz (Ka-Band)


+/-100 MHz

Communication Interface

RS-232 or RS-485 available as separate models

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


+/- 0.3% - Speeds are rounded down to the nearest unit or tenths of a unit depending on the unit resolution setting

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)

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

Control and General 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

Format D Direction Character Enable (RS-232 only)

Zeros After Target (RS-232 only)

Message Period

Format D Update on Change Only (RS-232 only)

Format D Zero Report (RS-232 only)

Polled Modes D0-D4 (RS-232 only)

Target Recognition

Opposite Lane/Stationary Sensitivity

Fine Sensitivity Adjust

Sensitivity Hysteresis

Low Sensitivity

Target Strength Sensitivity

Target Acquisition Quality

Target Loss Quality

Target Filtering

Stationary Low Cutoff

Spurious Speed Filter

Max AGC Gain

Min AGC Gain

Current AGC Gain

Speed Presentation

Cosine 1 Angle

Cosine 2 Angle

Holdover Delay

Locking Targets

Lock Option

Faster Locking Enable

Strongest Lock

Fast Lock

Speed Alarm

Alarm Speed Threshold


Doppler Audio Volume

Aud 0 Enable

Variable Doppler Loudness


Beep Volume

TX Power Save

TX On Time

TX Off Time

Keep TX On with Target

Max TX On Time


Fork Enable

Auto Test Period

Auto Test Mode

Enhanced Test


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Speed Sensor Address (RS-485 only)