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  It's better to forfeit moments of your life

than to forfeit your life in a moment.  

Intentional or unintentional speeding can result in costly outcome.    SpeedWatcher   is the answer.  

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DGSS - Digitalmor GPS Speed Sensor is the core of our products ranging from Vehicle Speeding Alarms to Speed Activating Switches. The DGSS core design was based on the experience we gained in the past six years and feedback we received from customers around the world.


VSS - Vehicle Speed Sensor, the VSS tells the ECM (Electronic Control Module) how fast the vehicle is going. Most people think the VSS is only used for the dashboard speedometer & odometer. The VSS is also used to control the EGR (Exhaust-Gas Recirculation) valve, the charcoal canister purge valve, the electric cooling fans, idle speed, air/fuel ratio, radio volume, etc.
There are 4 types of VSS signals required by the ECM, and Rx4Speeding products (the VSA, SAS and the SpeedWatcher V) are designed to be compatible with them all:
  1. The two-pulse (2000 pulses per mile) square wave (D.C current or direct current) used on all TBI engines thru 1992, all computer-controlled-carbureted engines, and on 1985-1989 TPI engines.
  2. A four-pulse (4000 pulses per mile) sine-wave (A.C. current or alternating current) signal is required by the 1990-1993 TPI, 1992-1993 LT1 engines.
  3. A 40 pulse per driveshaft revolution speed sensor used on 1993 and newer trucks with automatic transmission, 1994 and newer rear drive cars with the automatic transmission
  4. A 17 tooth per driveshaft revolution speed sensor used on 1993-1997 LT1 engines with the Borg-Warner 6-speed transmission. An 11 tooth reluctor ring is used on 1993 LT1 engines with the Borg-Warner wide ratio (3.35 First gear) 6-speed transmission.


SpeedWatcher G

Model ID-

GI

GX

Easy installation - plugs into a cigarette lighter

Yes

Yes

Automatic self calibrating

Yes

Yes

Current Speed Display

Yes

Yes

Set Speed Limit Display

Yes

Yes

Compass Display

Yes

Yes

Convenient way of changing the speed limit setting (Up / Down PBS)

Yes

Yes

Speed Limit set in increments of 5 miles (10 Km) per hour

Yes

Yes

An over the Speed Limit Offset of 0 to 4 (to 9 Km) miles per hour

Yes

Yes

Alarm is ON while the vehicle is over the set speed limit

Yes

Yes

The alarm feature uses built-in Light

Yes

Yes

The alarm feature uses built-in Sound

Yes

No

External Devices - Output for activating flashing lights, horn, etc.

No

Yes

Key Lock - tampering resistance

Yes

Yes

Miles / Kilometers - Factory settings for Domestic and International

Yes

Yes




SpeedWatcher G

Model ID-

VI

VX

Easy installation - plugs into a cigarette lighter

No

No

Require Initial calibration

Yes

Yes

Current Speed Display

Yes

Yes

Set Speed Limit Display

Yes

Yes

Compass Display

No

No

Convenient way of changing the speed limit setting (Up / Down PBS)

Yes

Yes

Speed Limit set in increments of 5 miles (10 Km) per hour

Yes

Yes

An over the Speed Limit Offset of 0 to 4 (to 9 Km) miles per hour

Yes

Yes

Alarm is ON while the vehicle is over the set speed limit

Yes

Yes

The alarm feature uses built-in Light

Yes

Yes

The alarm feature uses built-in Sound

Yes

No

External Devices - Output for activating flashing lights, horn, etc.

No

Yes

Key Lock - tampering resistance

Yes

Yes

Miles / Kilometers - Factory settings for Domestic and International

Yes

Yes




Cigarette Lighter - Although SpeedWatcher GI and SpeedWatcher GX are equipped with Cigarette Lighter Power Connector, a permanent wiring will discourage tempering with the device's operation.


PBS - Push Button Switch, Digitalmor is improving its Vehicle Speed Sensor devices ergonomically by redesigning the controlling aspect of the units. The new design makes use of PBSs instead of the rotary knob used on our original Vehicle Speeding Alarm products in the past five years.


Speed Limit Offset - Depending on road conditions or other factors, some drivers may want to customize the speed limit settings on the device. The default speed limit settings fall at 5, 10, 15 . . . 90, 95 miles/km per hour and so on. The special "Speed Limit Offset" feature allows you to alter speed limit settings so that the 'increments of 5' fall at different values.
For example:

  • If the Speed Limit Offset is '0', the speed limit steps fall at 5, 10, 15 - 90, 95.
  • If the Speed Limit Offset is '3', the speed limit steps fall at 8, 13, 18 - 93, 98.

Sound - Internal Piezo Buzzer with Sound pressure Level of 85 DB at 2400 Hz. An external horn such as the vehicle horn can be energized / activated by the unit's output signal.


Light - Internal LED with Light intensity of over 6000 mC. An external light such as the vehicle headlight, break light, flashing light, etc. can be energized / activated by the unit's output signal.


GPS - Global Positioning System is a Satellite Navigation System.
  • GPS is funded by and controlled by the U. S. Department of Defense (DOD). While there are many thousands of civil users of GPS world-wide, the system was designed for and is operated by the U. S. military.
  • GPS provides specially coded satellite signals that can be processed in a GPS receiver, enabling the receiver to compute position, velocity and time.
  • Three GPS satellite signals are required to compute positions in two dimensions, and four GPS satellite signals are used to compute positions in three dimensions.

Space Segment

  • The Space Segment of the system consists of the GPS satellites. These space vehicles (SVs) send radio signals from space.
  • The nominal GPS Operational Constellation consists of 24 satellites that orbit the earth in 12 hours. There are often more than 24 operational satellites as new ones are launched to replace older satellites. The satellite orbits repeat almost the same ground track (as the earth turns beneath them) once each day. The orbit altitude is such that the satellites repeat the same track and configuration over any point approximately each 24 hours (4 minutes earlier each day). There are six orbital planes (with nominally four SVs in each), equally spaced (60 degrees apart), and inclined at about fifty-five degrees with respect to the equatorial plane. This constellation provides the user with between five and eight SVs visible from any point on the earth.

Control Segment

  • The Control Segment consists of a system of tracking stations located around the world.
  • The Master Control facility is located at Schriever Air Force Base (formerly Falcon AFB) in Colorado. These monitor stations measure signals from the SVs which are incorporated into orbital models for each satellites. The models compute precise orbital data (ephemeris) and SV clock corrections for each satellite. The Master Control station uploads ephemeris and clock data to the SVs. The SVs then send subsets of the orbital ephemeris data to GPS receivers over radio signals.
  • GPS Monitor Network consist of four additional monitoring stations in Hawaii, Ascension Island, Diago Garcia and Kwajalein.

User Segment

  • The GPS User Segment consists of the GPS receivers, integrated in / with user applications. GPS receivers convert SV signals into position, velocity, and time estimates. Four satellites are required to compute the four dimensions of X, Y, Z (position) and Time. GPS receivers are used for navigation, positioning, time dissemination, and other research.
    • Navigation in three dimensions is the primary function of GPS. Navigation receivers are made for aircraft, ships, ground vehicles, and for hand carrying by individuals.
    • GPS Navigation
    • Precise positioning is possible using GPS receivers at reference locations providing corrections and relative positioning data for remote receivers. Surveying, geodetic control, and plate tectonic studies are examples.
    • Time and frequency dissemination, based on the precise clocks on board the SVs and controlled by the monitor stations, is another use for GPS. Astronomical observatories, telecommunications facilities, and laboratory standards can be set to precise time signals or controlled to accurate frequencies by special purpose GPS receivers.
    • Research projects have used GPS signals to measure atmospheric parameters.

Standard Positioning Service (SPS)

  • The use of the SPS is without charge or restrictions and is for civil users worldwide.
  • The DOD intentionally reserve for it's own use a more accurate.


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