K-55 Challenge
M.P.H. Industries
CPL Approved (single antenna and no auto-lock models)
Two versions available, the standard Country or a City version. Standard Country version has a switch on the antenna; C position for patrol car speed greater than 45 mph, T position for speeds of 45 mph or less (T position introduces additional filtering to reduce RFI effects). An optional ECM (Electronic Countermeasures) module disables auto-lock and alarm features, allows operators to lock target speed and continue to track (read through lock), and has no emissions until in RUN (transmit) mode. Some units use automobile speedometer cable to measure patrol car speed instead of the radar (moving mode only). This feature is intended to eliminate batching errors, and allows officers to operate radar in stop and go traffic without switching radar between stationary and moving mode.
OPERATION
CONTROLS
DISPLAYS / INDICATORS
SPECIFICATIONS
Frequency 10.525 +/- 25 MHz (X band) 24.150 +/- 100 MHz (K band) -------------------------------------------------------------- Sample Period 1/8 sec (125 ms) -------------------------------------------------------------- ANTENNA interior or exterior mounting Type Conical Horn Beamwidth 18 degrees azimuth and elevation (X band) 15 degrees azimuth and elevation (K band) Beamwidth Variance +/- 1 degree Polarization Circular side lobe -24 dB -------------------------------------------------------------- MICROWAVE SOURCE Solid State Gunn Effect diode Power 13 - 30 mW nominal, 50 mW max (X band) 12 - 50 mW nominal, 95 mW max (K band) -------------------------------------------------------------- Power Density less than 1 mW/sq cm at 5 cm range -------------------------------------------------------------- REC MIXER DIODE Schottky barrier (100 mW burnout rating) -------------------------------------------------------------- SPEED RANGE target 20 to 100 mph (stationary) 20 to 209 mph closing speed (moving mode) patrol car 20 to 69 mph STANDARD (COUNTRY) VERSION 15 to 59 mph CITY VERSION Accuracy +/- 1 mph -------------------------------------------------------------- TRAFFIC DIRECTION Stationary mode on-coming and going Moving mode opposite direction -------------------------------------------------------------- Supply Voltage patrol car battery 10.8 to 16.5 Vdc (13.6 Vdc nominal) 0.2 to 0.9 A (X band) 0.2 to 1.0 A (K band) -------------------------------------------------------------- Environmental -30 to 60 degrees Celsius (-22 to 140 degrees Fahrenheit) 90 percent humidity at 37 deg C ((99 deg F) -------------------------------------------------------------- claimed Range 2500 feet typical for average size vehicle -------------------------------------------------------------- PHYSICAL READOUT UNIT depth 8 in width 10 in height 1 3/4 in WEIGHT 3 1/4 lbs. ANTENNA (X band) front 4 7/16 x 4 7/16 in length 7 1/4 in back 2 1/2 x 3 1/2 in WEIGHT 2 lbs ANTENNA (K band) front 3 3/16 x 3 5/16 in length 4 3/4 in back 2 1/2 x 3 1/2 in WEIGHT 1 1/4 lbs