Stalker ATR Moving Radar
Applied Concepts

CPL Approved.

An upgraded version (2.0) of Stalker ATR stationary radar. Upgrade includes adding moving mode operation, and extending stationary speed measuring range from (1 - 150 mph) to (1 - 200 mph).

OPERATION

• Hand-held Ka band Radar Gun
  powered by internal (in handle) or car battery
  patrol car / motorcycle mounts optional
  optional hand-held wired remote control
• Ka band
  wideband mode -- frequency hops between 34.2 - 35.2 GHz (5 channels)
  single channel -- one of several fixed frequencies (between 34.2 - 35.2 GHz)
  early models used a fixed frequency of 34.70 GHz or 34.94 GHz (others probable)
• Instant On or continuous
• stationary or moving mode
• measures on-coming traffic only
• Fastest Target mode (not early models)
• Audio proportional to target Doppler
• Manual-lock (Speed), separarate display
• supplied with 2 tuning forks;
  25 mph (40 kmh)
  40 mph (64 kmh)

CONTROLS

• Instant On
  XMIT/HOLD -- radar transmitting / on but not transmitting
  TRIGGER -- transmit (from hold mode), lock display (if transmitting)
• Manual-lock Target Speed
  LOCK/REL -- lock / release target display
  TRIGGER -- transmit (from hold mode), lock display (if transmitting)
• Stationary / Moving Mode (STA/MVG)
  
• Audio Squelch -- squelch target audio tone (SQL)
• Speaker Volume -- audio Doppler (UP or DOWN arrow)
• Self-test (on power-up and TEST)
  -- crystal accuracy and transmit frequency
  -- processing circuits
• Backlight (on/off) switch for LCD (light symbol)
• Range Control (UP or DOWN arrow on power-up only)
• Power On/Off (PWR)

DISPLAYS / INDICATORS

mph or kmh (depends on software loaded)
• Display (LCD) -- Target Speed
  Stationary: 01 to 200 mph (01 to 360 kmh)
  Moving mode: 15 to 200 mph CLOSING SPEED (36 to 360 kmh)
  min patrol car speed in moving mode 1 mph

• Display (LCD) -- Locked (target) Speed
  Displays last locked speed while displaying current target in target speed display.

• Display (LCD) -- Patrol Car Speed

• Speaker (audio tone proportional to target Doppler)

• display indicators
  XMIT-- unit transmitting
  RFI -- Radio Frequency Interference present, operation inhibited
  JAM -- indicates interfering radar present, operation inhibited
  LOCK -- speed display locked
  BAT -- internal battery low
  TEST-- self test running (operated initiated)
  OK -- unit passes battery and built-in-test
  FAIL-- unit fails battery or built-in-test
  Speaker Volume Indicator

SPECIFICATIONS

       ACCURACY 
     stationary  +/- 1 mph  (+/- 1 kmh)
         moving  +/- 2 mph  (+/- 2 kmh)

MEASURING RANGE
     stationary  01 to 200 mph  (01 to 360 kmh)
         moving  15 to 200 mph  (36 to 360 kmh) CLOSING SPEED
                 (patrol car speed must be 1 mph or more)

       FREQUENCY   Ka band
        wideband   34.2 to 35.2 GHz (covers 5 channels)
           fixed   34.7  GHz (+/-100 MHz) 
                   34.94 GHz (+/-100 MHz) 
                   others?

  TRANSMIT POWER    20 mW (minimum)
                    50 mW (nominal)
                   100 mW (maximum)
   power density   4 mW/sq cm, 5 inches from lens

         ANTENNA   rectangular horn antenna
       beamwidth   9 degrees nominal
    polarization   vertical

    POWER SOURCE   Internal battery (in handle)
                   6.6 to 9.0 Vdc (1.5 amp-hour)
                   (0.7 A transmit, 0.04 A standby)
                   battery good for 4 to 12 hours

                   patrol car battery (9 to 16 Vdc)
                   typically 0.55 A at 13.8 Vdc (transmit)

   ENVIRONMENTAL
       operating   -30 to  70 degrees Celsius
                  (-22 to 158 degrees Fahrenheit)
                   90 percent humidity
   non-operating   -40 to  85 degrees Celsius
                  (-40 to 185 degrees Fahrenheit)
   
PHYSICAL  height    9.25 in, includes handle
          length   10.2 in
           width    3.5 in 
          WEIGHT   3 lb, 3 oz, includes handle

MICROWAVE SOURCE   Gunn-effect diode
   RECEIVER TYPE   Direct Conversion Homodyne
                   (low-noise Schottky barrier mixer diode)