RV-M7 GX GPS Transponder Quick-Start Guide

9. Installation

Secure the M7 modem using the mounting holes on the side flanges of the unit.
Connect a DC power source to the DC IN connection on the front of the modem. Use the supplied cable, or 18AWG wire, and connect the RED wire to +, and the black wire to – (ground). The black wire and the case of the M7 should be connected to earth ground.
Connect a good quality antenna, tuned to the operating frequency, to the RF connector on the front of the modem. Use a quality antenna, and place is at as high-above obstructions as possible.
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.
Connect a GPS antenna to the SMA connector of the 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 for 3.3V operation. The GPS antenna must have un-obstructed visibility of the sky.
Connect the computer, terminal, controller, or other hardware device that will be using the M7 modem to its DB-9 serial I/O connector using a shielded cable. Secure it to the M7 with the two mounting screws on the sides of the DB-9 connector.
If the antenna is mounted out doors, us a lighting arrestor in-line with the antenna, and properly ground the antenna and the M7 chassis to an earth ground.
Connect Digital Inputs. The stock 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

10. Operation

Once power is applied to the M7 GX, the internal GPS will begin to try to lock onto the GPS satellites.

The two LEDs on the front of the M7 will begin to alternately blink red back-and-forth every second.

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 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.

Refer to the M7 GX Technical Manual for details on all of the events that will trigger a transmission. Installation

RV-M7 GX GPS Modes of Operation

The GPX x command is used to configure the RV-M7 GX for various common configurations. The following table lists the parameters internal to the RV-M7 GX that are configured and saved when the GPS x command is executed. After the command is executed, individual parameters may be modified to customize the operation of the unit.

Parameter	GPS mode	Output Message Format	NMEA Position GGA, GSV, RMC	Position/status report rate	Data communication via RS232 also	Capable of Speed triggered position reports	Speed Trigger default	Minimum Distance Trigger	Digital Input Triggers	Serial Port Baud Rate	Can be a repeater
Command used to modify this parameter	GPS x	OUTPUT x	NMEAOUT x	TXRATE xx	DATAMUTE x		TRIGSPEED xx	TRIGDX xx	TRIGBITS xx	ATBD X	Repeat X Default = 0(off)
*Transponder*	1	Nothing	No (0)	10	TX only (1)	Yes	0 (off)	0 (off)	0 (off)	4800	NO
*RavTrack PC*	2	$PRAVE ( x=1 )	Yes (1)	10	TX & RX (0)	Yes	0 (off)	0 (off)	0 (off)	38400	Yes
*Radar*	3	$GPTLL ( x=2 )	Yes (1)	10	TX & RX (0)	Yes	0 (off)	0 (off)	0 (off)	38400	Yes
*GPS Display*	4	$GPWPL ( x=3 )	No (0)	10	RX only (1)	Yes	0 (off)	0 (off)	0 (off)	4800	Yes
*-LX receive only, no GPS in the unit.*	5	$PRAVE ( x=1 )	No(0)	10	RX (1)	No	N/A*1	N/A	N/A	38400	Yes

For Technical Assistance email or call Raveon at:

Raveon Technologies Corporation

990 Park Center Drive, Suite C

Vista, CA 92081

760-727-8004

www.raveontech.com

sales@raveontech.com