Nortek Signature Series User Manual

Telemetry Data Formats 81
© 2017 Nortek AS
7.4 DVL Bottom Track
The telemetry for the Bottom track is controlled by the SET/GETTMBT command. The DF
parameter of this command sets the data format.
Data format (DF)
Description
300
NMEA (PNORBT) format without Tags.
301
NMEA (PNORBT) format with Tags.
Table 17 Available Data formats for Bottom track.
Column
Field/TAG
Description
Data format
Example
1
BEAM
Beam number
n
BEAM=3
2
DATE
Date
MMDDYY
DATE=112813
3
TIME
Time
hhmmss.ssss
TIME=072228.23
45
4
DT1
Diff. time 1
s.ssss
DT1=0.1234
5
DT2
Diff. time 2
s.ssss
DT2=0.1234
6
BV
Bottom Velocity [m/s]
f.fffff
BV=1.11111
7
FM
Figure of Merit
f.f
FM=122.2
8
DIST
Distance [meter]
f.ff
DIST=36.66
9
WV
Water Velocity [m/s]
f.fffff
WV=2.22222
10
STAT
Status
hh
STAT=F7
Table 18 PNORBT NMEA sentence parameter description.
Example (DF=300):
$PNORBT,3,112813,072228.2345,0.1234,0.1234,1.11111,122.2,36.66,2.22
222,F7*7A
Example (DF=301):
$PNORBT,BEAM=3,DATE=112813,TIME=072228.2345,DT1=0.1234,DT2=0.1234,
BV=1.11111,FM=122.2,DIST=36.66,WV=2.22222,STAT=F7*75

Nortek Signature Series Specifications

General

Type	Acoustic Doppler Current Profiler (ADCP)
Operating Temperature	-5°C to +45°C
Storage Temperature	-20°C to +60°C
Temperature Sensor	Integrated
Pressure Sensor	Integrated
Compass and Tilt Sensor	Integrated
Data Storage	Internal memory
Communication Interfaces	Ethernet, RS-232
Depth Rating	Up to 6000 meters (depending on model)
Data Output	ASCII, binary
Beam Angle	Varies by model
Velocity Accuracy	±0.5% of measured velocity ±1 mm/s