The Ethernet Serial Hub (ESH) forms part of a ‘one-box’ solution designed to meet the complete on-board requirements for coastal USBL operations with Mini-Ranger 2.
The ESH is the network interface between the in-water acoustic instrument, GPS and the PC that runs the positioning software. In addition to accurately time-stamping incoming data from external devices such as gyro, VRU and GPS it provides power and communications for acoustic transceivers.
The ESH includes a time source that can be linked to GPS PPS input. All incoming data is time stamped to millisecond accuracy; outgoing transmissions and triggers can be scheduled to the same precision.