Specifications

Channel Master Operation Manual
P/N 95B-6001-00 (February 2006) page 93
WF – Blank after Transmit
Purpose Moves the location of first cell away from the transducer head
to allow the transmit circuits time to recover before the receive
cycle begins.
Format WFnnnn
Range see table
Frequency Minimum Maximum
300 kHz 10 cm 9999 cm (328 feet)
600 kHz 5 cm 9999 cm (328 feet)
1200 kHz 5 cm 9999 cm (328 feet)
Default WF0050 (1200 kHz), WF0100 (600 kHz), WF0200 (300 kHz)
Recommended Setting. The default setting for this command is
recommended for most applications.
Description WF positions the start of the first cell at some vertical distance
from the transducer head. This allows the Channel Master
transmit circuits time to recover before beginning the receive
cycle. In effect, WF blanks out bad data close to the trans-
ducer head, thus creating a depth window that reduces un-
wanted data in the ensemble.
NOTES.
1. The distance to the middle of cell #1 is a function of blank after transmit
(WF), cell size (WS), and speed of sound. The fixed leader data contains
this distance.
2. Small WF values may show ringing/recovery problems in the first cells
that cannot be screened by the Channel Master.
WN – Number of Cells
Purpose Sets the number of cells over which the Channel Master col-
lects data.
Format WNnnn
Range nnn = 001 to 255 cells
Default WN025
Recommended Setting. Set using WinHADCP.
Description The range of the Channel Master is set by the number of cells
(WN) times the size of each cell (WS).