Output Telegram Formats; Valeport Nmea Telegram ($Prvat); Sddbt Telegram - Valeport VA500 Operating Manual

Altimeter

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6. Output Telegram Formats

If the optional pressure sensor is fitted and enabled then the only data format that supports this is the Valeport

NMEA format. A number of other formats have been implemented to provide compatibility with existing systems.

$PRVAT, xx.xxx,M, xxxx.x, dBar*hh<CR><LF>

Field Number:

1. Range from transducer

2. Units

3. Pressure

4. Units

5. Checksum

Example:

$PRVAT,00.115,M,0010.1,dBar*39

$PRVAT,00.116,M,0010.0,dBar*3d

$SDDBT,x.x,f,x.x,M,x.x,F*hh<CR><LF

Sounder, Depth: Depth below transducer

Field Number:

1. Depth, feet

2. f = feet

3. Depth, meters

4. M = meters

5. Depth, Fathoms

6. F = Fathoms

7. Checksum

Example:

$SDDBT,0.4,f,0.1,M,0.1,F*02

Page 19

NB: This format limits the resolution of the altimeter to 0.1m

Output Telegram Formats

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