CiDRA Passive Sonar Transmitters - Manual (Page 38)

Table 5 Modbus Holding Registers (continued)
Address Size Type Value Description Values
4055 2 Float
SOS_SAMPLE_FRE
Q
Set sample frequency for SOS mode. This parameter
must be set for SOS and overrides the SAMPLE_FREQ
setting if running in SOS mode. Enter one of the
following: 3906.25 or 2055.921.
3906.25or 2055.921
4057 2 Float SOS_FREQ_MIN
Minimum frequency to use for SOS calculation. Typically
in the 100 to 500hz range. Depends upon the data
quality as seen on the k-w plot. SOS_FREQ_MIN and
SOS_FREQ_MAX set the frequency range over which
the SOS calculation will be performed.
4059 2 Float SOS_FREQ_MAX
Maximum frequency to use for SOS calculation.
Typically in the 800 to 1500hz range. Depends upon the
data quality as seen on the k-w plot. SOS_FREQ_MIN
and SOS_FREQ_MAX set the frequency range over
which the SOS calculation will be performed.
4061 2 Float SOS_MIN
Minimum SOS value to search for. If too much energy
(such as from a high velocity vortical ridge) causes the
algorithms to calculate a sound speed below that of the
main SOS ridge; this parameter may need to be
increased.
4063 2 Float SOS_MAX
Maximum SOS value to search for. If too much energy
along the 0 k value on the k-w plot and algorithms are
calculating SOS_MAX even when SOS ridge indicates
an SOS below this value; may need to decrease this
parameter.
4065 2 Float SOS_MIN_QUALITY
Minimum quality threshold for SOS/GVF display and
output.
4067 2 Float
SOS_CENTROID_W
IDTH
Define width of peak to use in calculation of SOS.
4069 2 Float
SOS_FREQ_THRES
H
This value selects the threshold that the second
derivative of a power array (generated at a specific
frequency over all k-space values) must break in order
for the specific frequency point to be considered a valid
frequency point.
20959-01 Rev 02 Page 3-23