Specifications

Channel Master Operation Manual
P/N 95B-6001-00 (February 2006) page 103
Table 18: Fixed Leader Data Format (continued)
Hex Digit Binary
Byte
Field Description
19,20 10 WN / Number
of Cells
Contains the number of range cells over which the Channel
Master collects data (WN-command).
Scaling: LSD = 1 range cell; Range = 1 to 128 range cells
21-24 11,12 WP / Pings
Per Ensemble
Contains the number of pings averaged together during a data
ensemble (WP-command). If WP = 0, the Channel Master
does not collect the WD water-profile data. Note: The Channel
Master automatically extends the ensemble interval (TE) if the
product of WP and time per ping (TP) is greater than TE (i.e., if
WP x TP > TE).
Scaling: LSD = 1 ping; Range = 0 to 16,384 pings
25-28 13,14 WS / Range
cell Length
Contains the length of one range cell (WS-command).
Scaling: LSD = 1 centimeter; Range = 1 to 6400 cm (210 feet)
29-32 15,16 WF / Blank
after Transmit
Contains the blanking distance used by the Channel Master to
allow the transmit circuits time to recover before the receive
cycle begins (WF-command).
Scaling: LSD = 1 centimeter; Range = 0 to 9999 cm (328 feet)
33,34 17 Reserved Reserved
35,36 18 WC / Low Corr
Thresh
Contains the minimum threshold of correlation that water-profile
data can have to be considered good data (WC-command).
Scaling: LSD = 1 count; Range = 0 to 255 counts
37,38 19 cr# / No. code
reps
Contains the number of code repetitions in the transmit pulse.
Scaling: LSD = 1 count; Range = 0 to 255 counts
39,40 20 Reserved Reserved
41-44 21,22 WE / Error
Velocity
Threshold
This field, initially set by the WE-command, contains the actual
threshold value used to flag water-current data as good or bad.
If the error velocity value exceeds this threshold, the Channel
Master flags all four beams of the affected bin as bad.
Scaling: LSD = 1 mm/s; Range = 0 to 5000 mm/s
45,46
47,48
49,50
23
24
25
Minutes
Seconds
Hundredths
These fields, set by the TP-command, contain the amount of
time between ping groups in the ensemble. NOTE: The Chan-
nel Master automatically extends the ensemble interval (set by
TE) if (WP x TP > TE).
51,52 26 EX / Coord
Transform
Contains the coordinate transformation processing parameters
(EX-command). These firmware switches indicate how the
Channel Master collected data.
xxx00xxx = NO TRANSFORMATION (BEAM COORDINATES)
xxx01xxx = INSTRUMENT COORDINATES
xxx10xxx = RESERVED
xxx11xxx = RESERVED
xxxxx1xx = TILTS (PITCH AND ROLL) USED IN
TRANSFORMATION
xxxxxx1x = RESERVED
xxxxxxx1 = BIN MAPPING USED
53-60 27-30 Reserved Reserved