Structurescan And Spotlightscan - Lowrance HDS-7 HDS Gen3 Installation Manual

Water speed averaging (sonar transducer)
Averages water speed by measuring your speed at a selected
interval of time. Water speed intervals range from one to thirty
seconds, e.g. if you select fi ve seconds, your displayed water speed
will be based on averaging over 5 seconds of sampling.
Calibration range: 1-30 seconds. Default is 1 second.
Water temperature calibration (sonar transducer)
Temperature calibration is used to adjust the water temperature
value from the sonar transducer to match the data from another
temperature sensor. It may be required to correct for localized
infl uences to the measured temperature.
Calibration range: -9.9° - +9.9°. Default is 0°.
 Note:
Water temperature calibration only appears if the transducer is
temperature capable. Check transducer type selection if this option
should be available.
Transducer type
Transducer type is used for selecting the transducer model
connected to the sonar module. The transducer selected will
determine what frequencies the user can select during sonar
operation. In some transducers with built-in temperature sensors,
the temperature reading may be inaccurate or not available at all if
the wrong transducer is selected. Transducer temperature sensors
are one of two impedances - 5k or 10k. Where both options are
given for the same model transducer, refer to paperwork supplied
with transducer to determine impedence.

StructureScan and SpotlightScan

These features are both enabled automically when a transducer is
plugged in before the unit has been powered on. The SpotlightScan
transducer has a 83/200 kHz element incorporated, which requires
connection to the 'Sonar' port. This transducer has XID (transducer
ID), so manual selection of the transducer is not required.
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Software setup | HDS Gen3 Installation Manual