Specifications

Channel Master Operation Manual
P/N 95B-6001-00 (February 2006) page 147
Ping: The entirety of the sound generated by an ADCP transducer for a sin-
gle measurement cycle. A broadband ping contains a coded series of pulses
and lags, while a narrowband ping contains a single pulse.
Ping Mode: Power conserving mode for a deployed ADCP or DVL, where
only the power needed for the immediate deployment task is drawn (as op-
posed to command mode, where the ADCP consumes considerable power
while simply waiting for input). This mode saves the deployment configu-
ration so that, in the event of a power interruption, the ADCP or DVL will
be able to automatically resume the configured deployment upon return of
power.
PlanADCP: Windows-based software package allowing the user to config-
ure, and evaluate the consequences of, a deployment command-set for an
ADCP.
Profile: A series of regularly spaced depth cells in which the ADCP meas-
ures velocity along with several quality control parameters.
Pulse: A sound wave generated by a transducer.
Propagation Delay: The change in the travel time of sound between a
source and scatterer, generally due to radial motion. As an example: if it
takes longer for sound to reflect back from a scatterer than it did a short
while ago (and the speed of sound has not changed), then the scatterer must
be getting farther away.
------ Q ------
------ R ------
Radial Motion: Movement which alters the distance between source and
scatterer.
Range: The maximum profile length of an ADCP, it depends on several fac-
tors (note that these factors are inter-related in a complex way, and the gen-
eralizations below are intended only as rules of thumb – use PlanADCP to
check specific combinations):
1. Frequency: the lower the frequency, the longer the range.
2. Depth cell size: the larger the cell, the longer the range.
3. Mode of operation: mode 1 has the longest range.
4. Bandwidth: the narrower the bandwidth, the longer the range.
5. Concentration of scatterers: generally, the more scatterers,
the longer the range.
6. Temperature: generally, the colder the water, the longer the
range.