Sonar Operation; Chirp - Lowrance HOOK-4x Operation Manual

Sonar operation

This unit supports two types of sonar: Conventional
and DownScan.
The features described in this section are for
conventional sonar. Refer to the DownScan
operation section for information on DownScan
features.

CHIRP

A CHIRP (Compressed High Intensity Radar Pulse)
transducer transmits a modulated pulse of all
frequencies within the bandwidth of the selected
transducer type.
This results in better image quality, better target
separation and greater depth penetration.
This unit supports High CHIRP, Medium CHIRP
and Low CHIRP, depending on the transducer.
CHIRP can be used with Lowrance conventional
sonar transducers.
• 50/200 kHz (Low/High CHIRP)
• 83/200 kHz (Medium/High CHIRP)
To use CHIRP, select the desired CHIRP frequency
from the Frequency menu.
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Sonar operation | HOOK X series