Teledyne WORKHORSE, Operation Manual, Page: 250 / 258

May 2015 WorkHorse H-ADCP Operation Manual
Page 238
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Output Data Format (PD16)
PD16 will NOT output data when the system is in Beam Coordinates (see EX – Coordinate
Transformation ). The data has to have been transformed to output meaningful data.
When configured for PD16 and recording data to the recorder (CF11111), CS will start
outputting data even if the card is full or missing.
The current generation of Sea-Bird acoustic modems uses the ‘$’ as a command terminator. This prevents
them from handling the NMEA standard messages which all start with the ‘$’ character. Consequently,
the current PD16 format is:
PRDIK,sn,yyddmm,hhmmss.ss,b
1
,m
1
,d
1
,b
2
,m
2
,d
2
,…,b
n
,m
n
,d
n
*xx<cr><lf>
Where:
sn = Serial Number
yyddmm = Date
hhmmss.ss = Time
b
x
= Bin Number
m
x
= Magnitude
d
x
= Direction
xx = NMEA checksum
• In the event of bad data, the appropriate field will be left empty, with the commas present to indi-
cate the absence of data.
•
The bins to be displayed are selected using the PB command as in the case of PD12.
•
The maximum length for the message is 480 bytes.
Sea-Bird Electronics has acknowledged that they have a problem and are said to be changing
their firmware to support the NMEA standard. At that time, use PD18 to meet the NMEA
standard.
Output Data Format (PD18)
PD18 is the same Output Data Format as PD16, but with the leading '$' necessary to fully comply with the
NMEA format.
PD18 will NOT output data when the system is in Beam Coordinates (see EX – Coordinate
Transformation ). The data has to have been transformed to output meaningful data.
When configured for PD18 and recording data to the recorder (CF11111), CS will start
outputting data even if the card is full or missing.