User manual SIMRAD PI HBU REV A

[. . . ] Improper use or maintenance may cause damage to the equipment and/or injury to personnel. The user must be familiar with the contents of the appropriate manuals before attempting to install, operate or work on the equipment. Kongsberg Maritime AS disclaims any responsibility for damage or injury caused by improper installation, use or maintenance of the equipment. Support If you require maintenance on your Simrad product contact your local dealer. [. . . ] It is connected between the hydrophone and the PI cabinet. The PI HBU is powered by a separate power supply. Prerequisites for use In order to use the PI HBU your PI receiver must operate with the following software version: · · · PI32: Not applicable PI44: DSP (Digital Signal Processor) version 1. 11 (or later) with MMI version 0. 50 (or later). PI54: DSP (Digital Signal Processor) version 1. 11 (or later) with MMI version 0. 50 (or later). Why use the PI HBU On the PI44 and PI54 systems, software release 1. 08 provided an increased range capability. By using the PI HBU (Hydrophone Booster Unit) as well the systems will offer additional range, and they will be more tolerant for noise. On PI32 systems, the PI HBU (Hydrophone Booster Unit) will also provide increased range capability. Why not use the PI HBU For the majority of PI users experiencing adequate performance, and with no need to increase the range capability, the PI HBU (Hydrophone Booster Unit) will not be required. When to use the PI HBU The PI HBU (Hydrophone Booster Unit) is recommended if the reception of the PI system is cluttered with noise from interference, or with noise from other acoustic systems on the vessel, such as sonars, echo sounders or logs. The PI HBU (Hydrophone Booster Unit) may also prove useful if you experience noise from the vessel propellers. 6 326153/A Recommended parameter settings RECOMMENDED PARAMETER SETTINGS When the PI HBU (Hydrophone Booster Unit) is put to use, the recommended parameter settings are changed. Simrad PI32 The following Receiver setup parameters are recommended when the PI HBU (Hydrophone Booster Unit) is put to use. · Interference filter: OFF ­ Switch ON if interference is still a problem. As an alternative, you may keep the filter OFF, and increase the Detection threshold (DT) setting in steps of 2 dB until the interference disappears. · Interference filter level: 9 ­ If you switch the interference filter ON, you may change the level to 8. · · · AGC: OFF Manual gain: 20 dB Max shooting speed: 1 kn ­ In order to maintain best possible reception during the shooting you may increase this setting to 5 kn. · Detection threshold (DT): 8 dB The other settings are not important. Figure 3 PI30 Receiver Setup, example Simrad PI44 and PI54 When the PI HBU (Hydrophone Booster Unit) is put to use, the recommended parameter settings are changed. 326153/A 7 Simrad PI HBU · Interference filter: OFF ­ Switch ON if interference is still a problem. As an alternative, you may keep the filter OFF, and increase the Detection threshold (DT) setting in steps of 2 dB until the interference disappears. · Interference filter level: 8 ­ If you switch the interference filter ON, you may change the level to 7. [. . . ] Disconnect the hydrophone connector on the rear side of the PI operator unit, and connect it to the PI HBU unit (A). Figure 5 PI HBU (Hydrophone Booster Unit) connections A B C 7 8 9 Hydrophone socket Cable to hydrophone socket on PI operator unit +24 Vdc power socket (use power supply provided with the PI HBU) Connect the cable from the PI HBU unit (B) to the hydrophone socket on the rear side of the PI operator unit. Connect the power supply to AC mains, and connect the power cable to the socket (C) on the PI HBU unit. [. . . ]