Wf - Blank After Transmit; Wi - Clip Data Past Bottom; Wj - Receiver Gain Select - Teledyne WORKHORSE Operation Manual

May 2015
WF – Blank after Transmit
Purpose Moves the location of first depth cell away from the transducer head to allow the transmit
circuits time to recover before the receive cycle begins.
Format WFnnnn
Range nnnn = 0 to 9999 cm
Default WF175 (300 kHz), WF100 (600 kHz)
Recommended Setting. The default setting for this command is recommended for most applications.
Description WF positions the start of the first depth cell at some vertical distance from the transducer
head. This allows the H-ADCP transmit circuits time to recover before beginning the re-
ceive cycle. In effect, WF blanks out bad data close to the transducer head, thus creating a
depth window that reduces unwanted data in the ensemble.
1. The distance to the middle of depth cell #1 is a function of blank after transmit (WF), depth
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 depth cells that cannot be
screened by the H-ADCP.

WI - Clip Data Past Bottom

Purpose Allows the H-ADCP to flag velocity data from beyond the bottom as bad.
Format WIn
Range n = 0 (Off), 1 (on)
Default WI0
Recommended Setting. The default setting for this command is recommended for most applications.
Description When the WI-command is set to WI0 (default), the H-ADCP sends/records all velocity
data readings even when the H-ADCP determines the data is beyond the bottom. WI1
tells the H-ADCP to flag data determined to be beyond the bottom as bad (data value set
to -32768 [8000h]).

WJ - Receiver Gain Select

Purpose Allows the H-ADCP to reduce receiver gain by 40 dB.
Format WJn
Range n = 0 (Low), 1 (High)
Default WJ1
Recommended Setting. The default setting for this command is recommended for most applications.
Description WJ0 tells the H-ADCP to reduce receiver gain by 40 dB. This may increase data reliability
in shallow-water applications where there is a high content of backscatter material. WJ1
(the default) uses the normal receiver gain.
Page 176
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
WorkHorse H-ADCP Operation Manual