Ramsey Electronics BS1 Manual de instrucciones descargar pdf (Pagina 32)

SG7• 32

MODIFICATIONS:

We are always interested in any customer reports and suggestions on

adaptions of the basic SG7 design. We do not recommend any circuit

modifications and ask that you remember that modifications make your kit

ineligible for factory repair. Our technicians are not able to get into telephone

discussions of possible modification ideas, but we're always glad to reply by

fax or mail to a few clearly-stated "yes-no" questions.

SG7 STATISTICS AND SPECIFICATIONS:

RANGE: Properly constructed, the SG7's is a mile, depending on terrain,

target size and obstruction.

ACCURACY: 1 mph from 10 to 99 mph.

TARGET LOCK TIME: For an accurate reading, the SG7 must be pointed at

the oncoming target for at least 2/7 of a second.

COUNTER UPDATE TIME: 1/7 second.

POWER SUPPLY: 12-14 Volts DC at 150 ma.

OPTIONAL CALIBRATIONS: Resistor R21 may be changed to permit any of

the following distance/combinations:

R21 = 10K LED Readout = Miles per hour (standard)

R21 = 4.7K LED Readout = Kilometers per hour or:

R21 = 4.7K LED Readout = Feet per second

R21 = 15K LED Readout = Meters per second.

OUTPUT SIGNAL FREQUENCY: The frequency of the output signal fed

from the radar gun unit to the counter-readout unit is computed by this

equation:

fd = 2.6 X 10^9 (2v/c) where:

v= target speed in meters-per-second

c = 3 X 108 meters-per-second

fd = Doppler shift frequency.

MORE SIMPLY: 1 MPH = 7.76 Hertz of Doppler shift frequency

THEREFORE: MPH = Total Doppler shift in Hz divided by 7.76.

IMPORTANT MEASUREMENTS:

•

Antenna length =1.1 inch

•

Antenna distance from back of can = 1.875 inch

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Ramsey Electronics BS1 Manual de instrucciones Pagina 32