icListen AF User Guide
© December, 2017
20
6.7
Network Discovery
In order to make finding your device on a network easier,
icListen
makes use of Ocean Sonics
’
Marco/Polo protocol to discover IP addresses.
A pair of programs (
Marco
and Polo), are used to discover
icListen
units on a network.
Marco
is the
application used by the end user on a PC which scans the network for devices, while Polo exists on the
icListen
unit and responds to messages from
Marco
. Using
Marco
, a unit can be discovered on a local
network, or through a direct connection to a device, even when not on the same subnet.
Marco
also
allows the network settings of the
icListen
unit to be reconfigured.
A copy of the
Marco
software is provided on the data stick supplied with all
icListen
units. As of version
4.0, Ocean Sonics’
Lucy
software is also capable of finding
icListen AF
units using the same message
protocol.
6.8
Low Power -12V Operation
As of hardware release 5,
icListen AF
supports a -12V mode, in addition to the regular 24V mode of
operation. This mode saves power by disconnecting the internal battery and associated control circuitry.
Due to the lack of internal batteries, when power is removed the unit is immediately shut down when
the -12V supply is removed.
To use the hydrophone in this mode, simply supply -12V to the hydrophone instead of +24V. The
internal batteries will be reconnected the next time +24V is applied to the instrument, and normal
operation resumed.
