Bf - Depth Guess; Bi - Gain Switch Depth - Teledyne WORKHORSE Operation Manual

WorkHorse H-ADCP Operation Manual

BF - Depth Guess

Purpose Sets a "best-guess" of expected bottom range for internal calculations.
Format BFnnnnn
nnnnn = 1 to 65535 dm (0 = automatic)
Range
Default BF0
Recommended Setting. The default setting for this command is recommended for most applications.
Description When set to a non-zero value, the H-ADCP transmits a fixed pulse based on a given bot-
tom range. This is useful for applications with fixed range bottoms. The command reduc-
es the amount of time the H-ADCP uses to search for the bottom if lost.
If improperly set, the H-ADCP may not bottom-track at all if the bottom range varies from the
input range.

BI - Gain Switch Depth

Purpose Selects the maximum vertical distance from the transducer to the bottom at which the H-
ADCP operates at low gain.
Format BInnn
nnn = 0 to 999 meters
Range
Default BI20 (300 kHz), BI10 (600 kHz),
Recommended Setting. The default setting for this command is recommended for most applications.
Description When the vertical range to the bottom is less than BI, the unit operates in low gain. When
the vertical range is greater than BI, internal logic determines which gain (low or high) is
optimal. In high backscatter areas, it may be necessary to raise this setting in order to de-
tect bottom throughout the range of the system.
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
May 2015
Page 133