This manual allows you to install and put to use the PI HBU (Hydrophone Booster Unit).
The Simrad PI HBU (Hydrophone Booster Unit) is a compact device designed to amplify weak signals from the PI hydrophone. It connects between the hydrophone and the PI cabinet and requires a separate power supply. The unit is recommended for users experiencing noise interference from other acoustic systems, sonars, echo sounders, logs, or vessel propellers on their PI44, PI54, or PI32 receivers.
The PI HBU is recommended if reception is cluttered with noise from interference, other acoustic systems like sonars or echo sounders, or vessel propellers.
PI44 and PI54 systems require DSP version 1.11 (or later) with MMI version 0.50 (or later).
The recommended manual gain setting for both PI32 and PI44/PI54 systems when using the PI HBU is 20 dB.