Furuno CSH-24F - Manual (Page 35)

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4.8 Synchronizing Transmission with Other Sonars,
Echo Sounders
To synchronize the transmission of the CSH-23/24 series sonars to that of other sonars or
echo sounders, wire units as follows.
Connections
Figure 4-33 Connections for synchronizing transmission with
echo sounder having current driven KP, voltage driven KP