Configuring the Hydrophones

You need to configure the hydrophones to correctly receive signals from the sensors.

Before you begin

Important: The two receiving hydrophones must have a minimum distance of 1 meter between each other.
Important: You need to remove the 50kHz notch filter on the wideband preamplifiers.
Important: On M4 and M6 systems, the receiving hydrophones must be both connected to a hydrophone input between H1, H2 and H3 or both between H4, H5 and H6. The transmitting hydrophone for a Slant Range must be connected to a different set of hydrophone inputs than the receiving hydrophones (for example, if the receiving hydrophones are connected to H1 and H2, the transmitting hydrophone must be connected to a hydrophone input between H4, H5 and H6).
Tip: To help you remembering the configuration, always begin to configure the port hydrophone, then the starboard hydrophone. This way, most of the values associated with port side will be smaller than those of the starboard side (hydrophone number, node numbers...).

Procedure

  1. From Scala2, click Menu > Expert Mode and enter the password copernic.
  2. Right-click the IP address of the receiver at the bottom of the page, then click Configure Receiver.
  3. From the left side of the page, click Hydrophones.
  4. Add the two receiving hydrophones, then enter the following settings:
    1. From Rx/Tx select Receive.
    2. From Location, select the port and starboard hydrophone. It is important to know which one is port and which one is starboard.
      Note: If you do not select the location, you will not be able to configure positioning settings.
  5. If you have Slant Range sensors:
    1. Add a third hydrophone. This hydrophone is passive. It receives a digital signal from the receiver, then transmits an acoustic signal to the sensors.
    2. From Rx/Tx, select Transmit.
      Note: The voltage emitted by the receiver on the hydrophone is approx. 140 Volt RMS (depending on ping frequency).
    Figure 1. Hydrophone configuration for Spread sensors
    Figure 2. Hydrophone configuration for Slant Range sensors