Connector Layout #
TEM Connectors #
There are four connectors on Bathyswath-3 TEM
- 2 on FPGA Board (power & communication)
- 2 on PA Board (transmit & receive)
|Designator||Primary Function||Description||Mating Connector|
|FPGA-J1||Ethernet||Ethernet connector (1GBPS)|
|FPGA-J2||Power||Power supply and GPIOs|
|PA-J1||Tx Connector||Transmit signal connector|
|PA-J2||Rx Connector||Receive signal connector|
TCB Connectors #
There are 20 connectors on TCB
- 18 coax (MMCXV) connectors (12 receive & 6 transmit)
- 1 Receive connector (J100)
- 1 Transmit connector (J101)
Connector Pin-out #
Power and communication pin-out #
|Designation||Board Connector||Mating Connector||Ribbon Cable|
xx.xx = Assembly length in inches
Power Connector (FPGA-J2) #
— Power B3 TEM with 9-18 VDC power supply. Average power consumption of the board is lower than 10 watts, but on start up, TEM Can draw up to 2 Amps of current for few microsecond,
Use minimum of two AWG28 wires for each PWR+ & PWR Ground pins.
Reserved pins: Leave unconnected
— PPS Input: PPS timing signals are used in the TEM firmware to maintain the TEM’s internal clock, which is then used to time-stamp the sonar data packets that are sent to the software. PPS signals are typically provided by GPS positioning systems. Internal clock of TEM can be synchronised with PPS (Pulse Per Second) signal. Signal can be either rising edge or falling edge LVTTL signal.
Make sure to connect signal ground to PPS source ground.
Ethernet Connector (FPGA-J1) #
The TEMs support 1000BaseT (1000 Mbit/s) Ethernet communications, on eight wires. The boards can also support 100BaseT (100 Mbit/s). In this case, four wires can be used.
Ethernet connections should be made through CAT5 cables. Short wire runs should at least be twisted in pairs: “pair 1 +” with “pair 1 -” and “pair 2 +” with “pair 2 -”.
Tx/Rx connectors pin-out (TEM & TCB) #
The transducers are connected to TCB using MMCXV connectors.
TEM & TCB are connected using ribbon cables.
Transmit connector (PA-J1 & TCB-J100) #
*NC = No Connection
Receive connector (PA-J2 & TCB-J101) #
*NC = No connection
TCB Coax Connectors Layout #
Bathyswath-3 transducers are equipped with coax cables and MMCXV RF connectors. The following table provides layout for MMCXV connectors on TCB board.