406388/F
325
NMEA VTG datagram format
The NMEA VTG datagram contains the actual course and speed relative to the ground.
Format
$--VTG,x.x,T,y.y,M,z.z,N,g.g,K,a*hh<CR><LF>
Description
1
$—
: Talker identifier
2
VTG
: Datagram identifier
3
x.x,T
: Course over ground (Degrees True)
4
y.y,M
: Course over ground (Degrees Magnetic)
5
z.z,N
: Speed over ground (knots)
6
g.g,K
: Speed over ground (km/hr)
7
a
: Mode indicator
• A = Autonomous
• D = Differential
• N = The data are not valid.
8
*hh
: Checksum
NMEA DDC datagram format
The NMEA DDC (Display Dimming and Control) datagram format allows you to
remotely control the colour palette and brightness of the TV80 display presentations.
Format
$--DDC,a,xx,b,c*hh<CR><LF>
Description
1
$—
: Talker identifier
2
DDC
: Datagram identifier
3
a
: Display dimming
• D = Daytime setting
• K = Dusk setting
• N = Nighttime setting
• O = The display backlight is turned off.
Содержание Simrad TV80
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