Teledyne WORKHORSE Operation Manual page 242

May 2015
Table 47: DVL Output Data Format (PD4/PD5) Details
Hex Digit Binary Byte Field
79-82 40,41 BIT Results
83-86 42,43 Speed of Sound
87-90 44,45 Temperature
91-94 46,47 Checksum
The H-ADCP packs velocity data into a two-byte, two's-complement integer [-32768, 32767]
with the LSB sent first. The H-ADCP scales velocity data in millimeters per second (mm/s). A
value of –32768 (8000h) indicates a bad velocity.
Bottom or reference-layer velocities will be all valid or all invalid. That is, if the X-velocity is valid
then the Y and Z-velocities are valid; if X is not valid, Y and Z are not valid.
The H-ADCP allows 3-beam transformations when the fourth beam is invalid. Indication of a 3-
beam transformation for bottom-track is valid bottom velocities and one and only one beam's
range to bottom is marked bad (zero).
There is no indication that a 3-beam transformation was performed for water reference layer
velocity data.
Page 230
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Description
These fields contain the results of the H-ADCP's Built-in Test function. A zero code indi-
cates a successful BIT result.
BYTE 40 BYTE 41 (BYTE 41 RESERVED FOR FUTURE USE)
1xxxxxxx xxxxxxxx = RESERVED
x1xxxxxx xxxxxxxx = RESERVED
xx1xxxxx xxxxxxxx = RESERVED
xxx1xxxx xxxxxxxx = DEMOD 1 ERROR
xxxx1xxx xxxxxxxx = DEMOD 0 ERROR
xxxxx1xx xxxxxxxx = RESERVED
xxxxxx1x xxxxxxxx = DSP ERROR
xxxxxxx1 xxxxxxxx = RESERVED
Contains either manual or calculated speed of sound information (EC-command).
Scaling: LSD = 1 meter per second; Range = 1400 to 1600 m/s
Contains the temperature of the water at the transducer head.
Scaling: LSD = 0.01 C; Range = -5.00 to +40.00 C
This field contains a modulo 65536 checksum. The H-ADCP computes the checksum by
summing all the bytes in the output buffer excluding the checksum. NOTE: This field con-
tains the checksum only when the PD4-command is used. If PD5 is used, the remaining
bytes are explained in Table 48.
WorkHorse H-ADCP Operation Manual