Hi Valeri,
It is okay to use the "8 SAMTEC RF Connector-to-SMA bulkhead cables" to connect transducer to the board. But, you need to make few adjustments on the board to make this operational. Remove the capacitors CB51-CB58 at the LM96550's output and make sure the jumpers are placed on PS0-PS7.
Yes. The supply voltages 5V, 10V, 40V and 50V are the dual pos/neg voltages.
The +/- 5V is connected to the T/R switch (LM96530) which should draw ~20mA. The VSUB, +/-10V, +/-40V and +/-50V are connected to the LM96550 (HV Pulser).
| VSUB | ~1mA |
| +50V | ~4mA |
| -50V | ~3mA |
| +10V | ~12mA |
| -10V | ~8mA |
The power-on and power-off sequence is the most important part.
The Power ON sequence:
1. Power on the VSUB first (can range from -65V to -55V). (most important)
2. Power up +3.3V Digital IO Voltage supply for all of the devices.
3. Power up +1.8V for the Beamformer.
4. Power up ±5V for the T/R Switch.
5. Power up ±10V for the Pulser’s Level Shifter Voltages.
6. Power up -50V 1st and then last +50V for the Pulser and ±40V are generated from +-50 V with 10V difference when ±50V are turned on.
The Power OFF sequence:
1. Power down first +50V and then -50V for the Pulser.
2. Power down ±10V for the Pulser’s Level Shifter Voltages.
3. Power down ±5V for the T/R Switch.
4. Power down +1.8V for the Beamformer.
5. Power down +3.3V Digital IO Voltage supply for all of the devices.
6. Power down the VSUB last. (most important)
Thanks,
Rohit