Ballinger Technology Pty Ltd  

Design, Distance, Speed, Vehicle Counting

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Stalker DSR

The Stalker DSR

Highly accurate and effective Direction Sensing Radar

• Direction Sensing Technology
• Same-Lane Tracking Operation -
Simple, Accurate, and Automatic
• Stationary Direction Control
• Stongest and Faster Targets Displayed
• Stronest and Faster Targets Can Be Locked
• True Waterproof Digital Antenna Communications
• Small Detachable Display Unit
• Software Upgradeable
• Interfaces with Cameras & Computers
• 3 Year Full Warranty

Optional Motorcycle Kit
(Includes Waterproof Switch Display, Sealed Remote Control, Waterproof Cable Connections, and Special Mounting Hardware)

By displaying both strongest and faster targets simultaneously, the Stalker DSR can monitor faster vehicles passing larger vehicles and display the speed of both targets simultaneously.

Same Lane Problems Eliminated
Many conventional radars force the operator to visually estimate and manually input faster or slower targets each time in order to calculate readings. The DSR automates the procedure, making same lane operation as accurate and simple to use as opposite mode operation.

The operator can DISPLAY or LOCK:
1) Strong targets
2) Fast targets

While in:
1) Same lane mode
2) Opposite lane mode
3) Stationary mode

True Doppler Audio
The audio Doppler tone in opposite-lane operation is generated from the target’s actual speed (not closure speed) so the tone always correlates directly to the target’s speed – regardless of patrol speed.

Vehicle Speed Sensing (VSS) Operation Is Standard
Connecting the radar to power and VSS has never been simpler. Plug the Stalker CAN/VSS cable into the car’s OBD II diagnostic port located under the dash on the driver’s side, and you’re done. No cables to splice, wire harnesses to find, just simple plug-n-play.

Provides Voice Verification of the Antenna, Radar Mode, and Direction

Whenever a target is locked, the Stalker DSR audibly tells the operator WHICH antenna is in use (front or rear), what MODE the radar is operating in (moving or stationary), and the DIRECTION (opposite or same direction) the vehicle is traveling. This added step assists the operator in ensuring accuracy every time.

Track-Thru Lock, With 3 Window Multi-Colored LEDs
The Stalker DSR allows tracking both patrol speed and target speeds after lock using three colors (amber, red, and green) to differentiate between the strongest, faster and patrol speeds.

The Most Sophisticated

Ka-Band Antennas

Faster Target Acquisition and More Dynamic Range

WATERPROOF Ka-Band Antenna

The Stalker DSR comes standard with O-ring sealed, Ka-Band antennas. These compact, completely waterproof antennas include locking connectors and can be exterior mounted with no reliability concerns.

Patented, RFI Immune Digital Antennas

The Stalker DSR achieves the industry’s longest range by digitizing the Doppler audio signal at the antenna and using a high-speed digital communication link to transmit data between the antenna and the counting unit.

Traditional two-piece radar units send a low-level Doppler audio signal from the antenna to the counting unit for processing and speed display. This method is susceptible to noise induced by the auto ignition and 2-way radio transmissions, which results in reduced range and increased potential for false targets. By using a digital signal, we’ve eliminated these false signals and improved the reliability of our products.

Small Counting Unit with Detachable Display
The display / counting unit is compact enough to be mounted almost anywhere. It measures a mere 5.5” wide x 4.25” deep and only 1.75” tall. Moreover, the display / counting unit can easily be separated and be mounted independently and connected with an optional cable. The display alone is only 1.125” deep.

Serial Port
The serial RS-232 port can interface with most video cameras, computers, remote readouts, printers, etc. The Stalker DSR interfaces with the 54Ward and Rockwell-Collins integrated car systems.

Dramatically Simplifies Moving “Same-Lane” Operation While Automatically Ensuring Accuracy
With direction sensing antennas, the Stalker DSR is able to automatically determine if same-direction vehicles are closing or going away from the radar. This allows the DSR to automatically measure same-direction traffic speeds as simply and accurately as it does with opposite-direction traffic. No longer does the operator need to tell the radar if same-direction traffic is faster or slower than the patrol vehicle. The Stalker DSR makes same-direction operation simple, accurate, automatic and allows the operator to lock same direction targets.

A Giant Leap in the Effectiveness of Stationary Operation

Optional Waterproof Components
Stalker’s DSR waterproof components are durable, accurate products for continuous duty in the worst conditions. A full selection of brackets, mounts and cables are available.

The direction sensing ability of the Stalker DSR allows the operator to select a specific direction of traffic to monitor. The DSR can measure closing targets while automatically ignoring vehicles that are going away–even if the target moving away is closer than a distant closing target.

Imagine the typical situation where you wish to measure closing vehicles at a lengthy distance on a two-lane road. Just when a distant car enters the picture, a truck passes by your location heading away from you (and towards the approaching car). A conventional radar would display the truck’s speed until it is out of the area–and you could not measure the closing car’s speed. The DSR is able to completely ignore the truck because it is traveling away from the radar, thereby being able to clock the closing vehicle–even though it is still distant.

The Stalker DSR makes stationary operation very useful and highly effective in all locations.


Dual Antenna Direction Sensing Moving/Stationary Doppler Radar  

Operating Frequency:

 33.4 GHz - 36.0 GHz (Ka-Band)  


 ±100 MHz (Ka-Band)

Power Requirements:

(With 2 Antennas)  10.0 to 16.4 VDC. (currents are typical at 13.6 VDC): XMIT with all displays on: 1.28A XMIT with all displays off: 1.08A XMIT with moving target: 1.15A XMIT with no target: 1.11A Standby with no target: .8A  


 -30° to +70° C, 90% Relative Humidity Operating -40° to +85° C, non-operating  


 Triple (red, green, amber) 3-digit Light Emitting Diode (LED) for target, lock, and patrol, plus LED icons  

Mechanical:  Display Unit

Weight - 0.5 lb. Size - 1.65" Height, 1.05" Depth, and 5.50" Width  

Counting unit

Weight - 1.6 lbs. Size - 1.65" Height, 3.90" Depth, and 5.50" Width  


Weight - 1.4 lbs. Size - 2.50" Dia. X 4.75" Length  


Weight - 0.4 lb. Size - 1.00" Height, 6.20" Length, and 2.25" Width


 +1, -2 mph stationary, ±2 mph moving +2, -3 km/h stationary, ±3 km/h moving  

Automatic Self-Test:

  Performed every 10 minutes while transmitting  

Stationary Speed Range:  

12 mph to 200 mph Standard or 2 mph to 200 mph (set-up menu selectable)

Stationary Fastest Speed

Same speed range as stationary speed

Moving Speed Range:  Patrol speed

Once acquired, will track to 150 mph. Acquistion speed is selectable with P.S. 5/20 key. 5 in patrol window for patrol speed acquistion speeds of 5 to 90 mph; 20 in patrol window for patrol speed acquistion speeds of 20 to 90 mph

Opposite lane target speed – 200 mph Max closing For 5 mph patrol speed: 20 mph to 195 mph; For 70 mph patrol speed: 35 mph to 130 mph.

Opposite lane Fastest Speed – Same speed range as opposite lane speed  

Same lane target speed – Related to patrol speed: ±70% of patrol speed within 5 mph of patrol speed. For 50 mph patrol speed: 15 → 45 mph and 55 → 85 mph. Same lane patrol speed must be greater than 15 mph  


Microwave Specifications


 Conical horn with corrective lens  



3 db Beam width:

  12° ±1º  

Microwave Source:

  Gunn-Effect diode  

Antenna Receiver Type:

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

Power Output:

10 mW minimum 25 mW nominal 50 mW maximum

Power Density:

 2 mW/cm2 maximum at 5 cm from lens  

Display Messages


  PASS spelled out in display with a 4-beep “happy” tone indicates the unit has just passed self-test.  


 FAIL spelled out in display with a 15-beep tone indicates a circuit malfunction has been detected, in which case speed readings are inhibited. Remove the unit from service and repair. FAIL will remain on the display until reset by being powered off.  

[ ], SC, SA, or S_:

  Indicates the radar mode of operation in the patrol speed window. [ ] or a speed display in the patrol window indicates moving mode radar operation. SC indicates stationary operation with display of closing targets only. SA indicates stationary operation with display of targets proceeding away from the radar unit. S_ is a mode for stationary operation which allows the display of targets in both directions.  

SEn 1, SEn 2, SEn 3 or SEn 4:

 SEn 1 thru SEn 4 is used to indicate the current range (sensitivity) setting . SEn 1 is minimum; SEn 4 is maximum. Opposite lane sensitivity is independent of same lane sensitivity. They are separately set.  

5 or 20:

b 0, b 1, b 2, or b 3:  These symbols are spelled out in the Patrol Speed display during the time that the audio number (Aud 3) is shown in the Target and Lock displays. The b number indicates the beep volume and is accessed by using the P.S. BLANK key.  

U 0, u 1, u 2, or u 3  These symbols are spelled out in the Patrol Speed display during the time that the audio number (Aud 3) is shown in the Target and Lock displays. The u number, when displayed, indicates the state of the voice volume and is accessed by using the SQL key.  

bri 1, bri 2 bri 3, bri 4,

bri 5, or bri 6:

  Used to indicate display brightness. bri 1 is the dimmest; bri 6 is the brightest.  


The display flashes Hot and powers down when the internal temperature exceeds specifications. Automatically resumes operating when the temperature drops.  

 Remote Control Functions


 The STRONG LOCK/REL key alternates between the lock and the release functions for the strong target. LOCK is used to transfer the contents of the target window to the lock window. REL clears the locked contents of the lock window and the patrol window. During lock, the patrol window will lock the present patrol speed and the LOCK icon will light. The target window and Doppler audio remain active after lock.  


  Used to switch between the front and rear antenna. The FRONT or REAR icon will light. A 1-beep tone corresponds to the front antenna while a 2-beep tone corresponds to the rear antenna. The counting unit can sense the presence or absence of either antenna.  


Toggles between xmit and hold (standby). The XMIT icon will light.  



Sequences between Moving mode and three stationary modes of operation: targets closing only, targets away only and targets in either direction.  


 The SAME/OPP key is used to alternate between same lane moving mode and opposite lane moving mode. The SAME icon toggles on and off to indicate same lane mode.  


The FAST LOCK/REL key alternates between the lock and the release functions for the fast target. LOCK is used to lock the contents of the fast window and REL clears the locked contents of the fast window. During fast lock, both the FAST icon and the LOCK icon will light and the patrol window will lock the present patrol speed. The target window and Doppler audio remain active after locking.  


Toggles the unit from radar mode to stopwatch mode and back again.  


  In Stopwatch Mode, the S/S (or START/STOP) key is used to start and stop the electronic timing of the target vehicle as it enters and exits the speed measurement zone.  

100:  In stopwatch mode, this key can be used to change the timing distance in 100 yard increments.  

10:  In stopwatch mode, this key can be used to change the timing distance in 10 yard increments.  

1:  In stopwatch mode, this key can be used to change the timing distance in 1 yard increments.  


 Used to adjust the range (sensitivity) at any time. Maximum sensitivity is SEn 4; minimum sensitivity is SEn 1. Opposite lane sensitivity is independent of same lane sensitivity. They are separately set.  


 The SQL key toggles the squelch override off and on. In the normal (off) position, audio will only be heard when a target is being tracked. When the Doppler audio menu is displayed, this key can be used to change the voice volume.  

PS 5/20:  

Used to select a low-end patrol speed of either 5 mph or 20 mph. For example: 5 in patrol window for patrol speed acquisition of 5 to 90 mph 20 in patrol window for patrol speed acquisition of 20 to 90 mph  


 In radar operation, performs a complete self-test on display/counting unit and the selected antenna. The display unit shows speeds of 10, 35, and 65; temperature inside the display/counting unit in °F (e.g., 110 °F); and input battery voltage (e.g., bAt 13.8); followed by "PASS" and a 4-beep “happy” tone or “FAIL” and a 15-beep tone. At the end of a successful test, the FORK icon is lit on the display to allow a measurement of non-directional speeds such as that produced by a tuning fork.  


Used to adjust the volume of the Doppler audio up or down. Aud 0 is off; Aud 4 is loudest.  


 In radar operation, this is a three function key. Used to re-acquire patrol speed. Also, blanks the patrol speed after a target speed and patrol speed are locked. Pressing the P.S. Blank key again restores the blanked speed. When the Doppler audio menu is displayed, this key can is used to change the beep volume.  

Dual function key. A single depression of the key activates the keyboard backlight for six (6) seconds. Two rapid depressions of the key activates the display brightness control. Additional depressions of the key toggles the display unit's brightness from bri 1 (low) to bri 6 (high).