Raveon RV-M7 Spezifikationen PDF herunterladen (Seite 41)

M7 GX Technical Manual 41 Raveon Technologies Corp.

3. Connect a good quality antenna, tuned to the operating frequency, to the RF

connector on the front of the modem. Use a good antenna, and place is at

as high-above obstructions as possible.

4. A separation distance of at least 20 centimeters must be maintained

between the transmitter's radiating structures and the body of the user or

nearby persons.

5. Connect a GPS antenna to the SMA connector of the RV-M7 GX. Although

a passive antenna may work if the cable length is very short, it is

recommended that an amplified antenna be used, rated at 3.3V operation.

6. Connect the computer, terminal, controller, or other hardware device that will

be using the RV-M7 modem to its DB-9 serial I/O connector using a shielded

cable. Secure it to the RV-M7 with the two mounting screws on the sides of

the DB-9 connector.

7. If the antenna is mounted out doors, us a lighting arrestor in-line with the

antenna, and properly ground the antenna and the RV-M7 chassis to an

earth ground.

8. Connect Digital Inputs. The stock RV-M7 GX has up to 3 digital inputs,

using the input pins of the RS-232 serial port. An open circuit or ground is a

0, and if they are connected to a positive voltage greater than 3V, they are a

digital 1.

RS-232 Pin

Function

4 - DTR

Input 0

7 - RTS

Input 1

3 - TXD

Input 2

5 - Ground

GND

Connect to vehicle chassis or other

ground point.

8. Operation

Once power is applied to the RV-M7 GX, the internal GPS will begin to try to lock

onto the GPS satellites.

The two LEDs on the front of the RV-M7 will begin to alternately blink red back-

and-forth at a 1-second rate. (1/2 second one is red, ½ second the other is red)

This indicates the internal GPS receiver is trying to lock onto the GPS signals.

After 10 to 60 seconds, depending upon the satellite strength, the red alternating

blinking will stop. This indicates the internal GPS receiver is locked onto GPS

satellite signals, and has a position fix.

The RV-M7 GX will only transmit if it has GPS lock. If the GPS antenna is broke or

obscured, the unit will not report position or status.

When it is locked to GPS, it will transmit its position and status at the interval

programmed into the TXRATE parameter.

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