The Stalker DUAL SL -
The industry standard for moving Police radar
• Industry Leading Performance
• Automatic Same Direction Tracking
• Intelligent Fastest Speed Tracking
• Available with 1 or 2 Antennas
• 3 Window Multicolored LED Display
• Read-Thru Lock
• Cordless Infrared Remote
• Compensated True Audio Doppler
• Digital Antenna Communications
• Narrow Beam Width
• Waterproof Ka Band Antenna
• 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)
The longest range in moving police radar now
includes automatic same direction operation.
The Stalker DUAL SL sets the standard in the industry for range and performance. The best
performance means accurate monitoring at greater distances, which results in superior tracking
history and better target identification.
3 Window Fastest Speed Tracking
Stalker’s patented Faster Speed Tracking assists the operator in making proper target
identification by displaying both the Strongest and highest speed targets simultaneously on
separate, multi-color display windows.
Automatic Same direction Operation
With direction sensing capabilities, the Dual SL is able to automatically determine if
vehicles in the same direction are closing or going away from the radar. This allows the
Dual SL to automatically measure same-direction traffic speeds as simply and accurately as
it does opposite-direction traffic.
True Doppler Audio
The Stalker DUAL SL compensates for patrol speed variations when generating the Doppler
audio. Since the audio tones do not vary with patrol speed, the operator learns to correlate
this true Doppler audio with target speed, which eliminates the need to constantly watch the
display to determine target speed.
Cordless Ergonomic Remote
The Infrared cordless remote moves all controls into the palm of the operator’s hand.
After experiencing the convenience and ergonomic sensibility of the Stalker Omnidirectional
and backlit cordless remote, no operator will ever want to return to corded or faceplate
Detachable Display Unit
The tiny display module can be easily separated from the counting unit using an optional
cable. This allows for nearly limitless installation options.
The serial RS-232 port can interface with most video cameras, computers, remote readouts,
printers, etc. The port interface eliminates the need to route additional cables to the
Optional Waterproof Components
The Stalker’s Dual SL shares the optional waterproof motorcycle components with the
Stalker 2X. Durable, accurate products for continuous duty in the worst conditions.
The Most Sophisticated Ka Band
Twin Balanced Mixers
The extremely sophisticated Ka band antennas use two mixer diodes (every other radar
available uses just one diode). By averaging the Doppler signal from two diodes, the ending
signal is much cleaner (less static or noise). The reduced signal noise increases
sensitivity and allows the radar to achieve much longer range.
Patented Digital Antenna
The Stalker DUAL SL achieves longer range by digitizing the Doppler audio signal at the
antenna and using a high speed bi-direction communication link to transmit data between the
antenna and the counting unit. Other two-piece radar units (even DSP 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 result in reduced range and increased potential for false signals.
O-Ring Sealed Waterproof Design
The completely waterproof Ka band antenna features O-ring seals and connectors. The antenna
can be exterior mounted with no reliability concerns.
Narrow Beam Width
The narrow antenna beam-width of 12 degrees improves target discrimination.
Four-Direction Speed Monitoring
With two antennas, the Stalker DUAL SL’s moving mode can track vehicles in four
• In front of the Patrol moving the same direction
• In front of the Patrol approaching in the opposite direction
• Behind the Patrol moving in the same direction
• Behind the Patrol receding in the opposite direction
CABLES: Power and CAN/VSS cables are Stalker radar unit and vehicle specific. Mounts: Determine the proper brackets and mounts for both motorcycle and vehicle.
Moving/Stationary Doppler Radar
33.4 GHz - 36.0 Ghz
(With 2 Antenna)
9.0 to 16.0 VDC.
(currents are typical at 12VDC)
XMIT with all displays on: 1.3A (Ka)
XMIT with all displays off: 1.1A (Ka)
XMIT with moving target: 1.3A (Ka)
XMIT with no target: 1.2A (Ka)
Standby with no target: .7A (Ka)
-30 to +70 C, 90%
Relative Humidity Operating
-40 to +85 C, non-operating
Triple 3-digit Light
Emitting Diode (LED) for target, lock, and patrol, plus LED icons
Display Unit Wt.
- 0.5 lb.
1.65" Height, 1.05" Depth, and 5.50" Width
Counting unit Wt.
- 1.6 lbs.
1.65" Height, 3.90" Depth, and 5.50" Width
+1, -2 mph stationary,
±2 mph moving
+1.6 km/h, –3.2 km/h stationary, ±3.2 km/h moving
Performed every 10
minutes while transmitting
Stationary Speed Range:
12 mph to 200 mph
2 mph to 200 mph (set-up menu selectable)
Moving Speed Range:
speed - Selectable with P.S. 5/20 key: 5 in patrol window for acquisition of 5 to 90 mph 20 in patrol window for acquisition of 20 to 90 mph
Patrol speed, once locked, will track to 150 mph Same direction patrol
speed must be greater than 15 mph
direction 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.
target speed - Related to patrol speed: ±70% of patrol speed
to within 5 mph of patrol speed
i.e. For 50 mph: 15 ® 44 mph and 55 ® 85 mph Fastest Speed
- Same speed range as opposite direction speed