V-Data VED-M Operation Manual - Gps Receivers
4
GPS Receivers
V-data can supply 12 channel GPS receivers by GARMIN International. The receiver,
designated GPS-35V, has integrated antenna, 16 foot cable, and VED compatible DB15M
connector. Mounting options including magnetic, suction cup behind windshield, permanent
flange, and 1 inch 14 TPI marine socket.
The receivers are shipped from V-data with $GPRMC, $GPGGA, $GPGSA messages
enabled and the pulse-per-second enabled. The VED requires the $GPRMC message as a
minimum, but other messages and the pulse-per-second can be enabled or disabled as desired by
sending setup commands to the receiver through the optional computer adapter cable via RS-232
communications at 4800 baud, 8 data bits, 1 stop bit, no parity. The following setup commands
can be sent:
To disable all messages
$PGRMO,,2
To enable all messages
$PGRMO,,3
To disable specified message
$PGRMO,*,0
To enable specified message
$PGRMO,*,1
name of the message. Available messages are GPGGA, GPGSA, GPGSV, GPRMC, GPVTG,
GPRME, PGRME, PGRMV, PGRMF, LCGLL, and LCVTG. Note: Enabling too many
messages may slow output interval to two seconds or more.
To disable pulse-per-second
$PGRMC,,,,,,,,,,,,1
(12 commas)
To enable pulse-per-second
$PGRMC,,,,,,,,,,,,2
The GPS receiver is wired to the DB15M connector as follows:
Receiver Signal
Wire Color
DB15M Pin
GPS Power
Red
10
GPS Ground
Black
14
Pulse-Per-Second
Gray
4
Receiver Setup
Blue
8
GPS Data
White
5
Power Control
Yellow
not connected
Aux. Output
Purple
not connected
Differential Corrections
Green
not connected (see below)
The receivers are differential ready and differential correction input to the receiver is
accomplished by adding another cable to the DB15M backshell. Limited power for the
differential receiver is available on Pin 11 with ground on Pin 15. If the differential receiver is
externally powered, connect the signal ground to Pin 15 and connect the signal to the
unconnected green wire inside the DB15 backshell. Baud rate selection is automatic.