Radar D
Test Data

Believed to be a CMI Speedgun 6

Beamwidth:	18.8 degrees
Power (ERP):	34.25 milliwatts (15 dBm)
Detection Range:	320 feet to 0.92 miles (100 m to 1.48 km)
Low Voltage:	10.2 Vdc, Fails
Type:	single unit (handheld)

Noted Abnormalities;

patrol speed shadowing (Severe)
Most large and small trucks caused shadowing. A 44 mph patrol car measured speed dropped to 11 mph with a pickup truck 100 feet in front of patrol car. The following readings (mph) were noted as trucks passed the radar patrol car.

	Patrol	Target
actual	30-40	50-60
measured	12	80
	16	72
	20	57
	17	68

target speed bumping (batching)
Measured target speeds decreased when patrol car accelerated or decelerated. When patrol car suddenly increased measured target speed decreased 3 mph. When patrol car suddenly decreased measured target speed decreased 5 mph.
AC/Heater fan
Picked up fan when antenna pointed at dash.
internal CB radio
CB caused interference when radar and CB connected to same battery.
internal 100 watt mobile police radio
No effect on strong target signals; boosted target speed 20 mph on weak signals.

RANGE TEST DATA
Range test conducted on straight stretch of open 2 lane highway 1.8 miles long. Radar operated from standard 4 door sedan.

  PATROL CAR      TARGET       CLOSING     RANGE
  Radar  mph   vehicle mph     sec  mph    miles  yards  feet   km

   D(5)  41     Pinto   35     3.0   76    0.06    105    320   0.1
    D    42     Pinto   44     4.2   86    0.1     175    530   0.16
    D    41     Pinto   52     4.6   93    0.12    210    630   0.19
   D(4)  41     Pinto   43     6.4   84    0.15    265    790   0.24
    D    43     Pinto   55     8.6   98    0.23    400   1210   0.37
    D    44     Pinto   50    11.8   94    0.31    545   1640   0.5

    D    42    T-Bird   45     4     87    0.1     175    530   0.16
    D    42    T-Bird   53    12     95    0.32    560   1690   0.51

    D    44   Winnabego 48    16.    92    0.41    720   2165   0.66
    D    43   Winnabego 60    32.1  103    0.92   1620   4860   1.48

(5) 41 mph radar (D) tracked 57 mph truck
    well behind 35 mph Pinto before tracking Pinto

(4) Also measured large truck in stationary mode:
    40 seconds at 53 mph, range 0.6 miles.

TRANSMIT FREQUENCY DATA

                             TRANSMIT      FREQUENCY FROM
        TEST CONDITION       FREQUENCY   AMBIENT   10.525 GHz
                                GHz        MHz        MHz
   AMBIENT TEMP, 13.6 Vdc     10.5391        -       14.1
  -30 degrees C, 13.6 Vdc     10.5468       7.7      21.8
   60 degrees C, 13.6 Vdc     10.5193     -19.8      -5.7
   AMBIENT TEMP, 10.9 Vdc     10.5390      -0.1      14.0
   AMBIENT TEMP, 16.3 Vdc     10.5390      -0.1      14.0

-30 degrees Celsius (C) = -22 degrees Fahrenheit (F)
60 degrees Celsius (C) = 140 degrees Fahrenheit (F)

TUNING FORK DATA
NONE

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Radar D
Test Data