Teledyne Echotrac E20 - Echotrac SBT Format; Echotrac DBT Format

SERIAL AND UDP OUTPUT STRING FORMATS
Echotrac E20 Operator's Manual
p. 52 of 60
November 25, 2020
Version 8
Uncontrolled Technology Subject to Restrictions Contained on the Cover Page.
C.2 Echotrac SBT (for depth)
Table 15 applies to the selection of Single Bottom Tracking (SBT) with one frequency (high or low) active.
Table 15: Echotrac SBT
Character #
Character
Description
1
<sp>, F
Normally a space, “F” = Fix mark
2-3
et, ET
Unit indicator: “et” = centimeters, “ET” = tenths of feet
4
<sp>, E
Normally a space, “E” = error
5
<sp>
Always a space
6
D
Depth data (MSD)
7
D
Depth data
8
D
Depth data
9
D
Depth data
10
D
Depth data (LSD)
11
CR
Carriage return
Example: <sp>et<sp><sp>DDDDD<CR>
= <sp>et<sp><sp>02035<CR>
= 02035cm
For both single- and dual-frequency operation, the SBT string is generated until another
string is selected on the Sensor tab (see section 4.4.2 Auxiliary Sensors). If the system is
operating in dual frequency with SBT selected, the high-frequency depth is generated.
C.3 Echotrac DBT (for depth)
Using a single frequency
Table 16 applies to the selection of Dual Bottom Tracking (DBT) with one frequency (high or low) active.
Table 16: Echotrac DBT with One Frequency Active
Character #
Character
Description
1
<sp>
Always a space
2-3
et, ET
Unit indicator: “et” = centimeters, “ET” = tenths of feet
4
<sp>, E, O
Normally a space, “E” = high frequency error, “O” = low frequency error
(missed return)
5
H, L
Frequency indicator: “H” = high, “L” = low
6
<sp>
Always a space
7
D
Depth data (MSD)
8
D
Depth data
9
D
Depth data
10
D
Depth data
11
D
Depth data (LSD)
12
CR
Carriage return
Example: <sp>ETOL<sp>DDDDD<CR>
= <sp>ETOL<sp>54321<CR>
= Low freq. error, 54321dft