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Original question:

TX7316EVM: Modification of the operating frequency

TX7316EVM: Combine 2 boards for 16/5levels and/or 32/3levels beam forming

6566340
Prodigy 10 points
Part Number: TX7316EVM

I got 2 TX7316EVM boards and would like to use them to test the beamforming on my 32 elements transducer. What is the easiest way to do it without much hardware modification?

  • 0
    TI__Intellectual 1650 points

    Hi,

    To use 2 independent boards for beamforming and transmitting 32 channels, we need to synchronize both the boards. This would require the BF_CLK and TR_BF_SYNC signals going to the device being synchronized. 

    Currently the clock is generated by an on-board crystal which is buffered to the device. Instead of this, we can feed in an external clock by making the following changes -  Remove R25 and R26 resistors and place R20 and R29 resistors. Feed the clock through J4 connector. This modification can be done for both the boards and feed in the same clock.

    TR_BF_SYNC is being generated by the on-board CPLD and buffered using an LVDS buffer. To synchronize this, we need to feed the TR_BF_SYNC generated on one board to the other.. This can be achieved through the following changes - On one board, remove the R116 resistor and connect the SYNC_BUF_IN from the second board to the input of the U10 buffer.

    It is better to use the device in normal power mode rather than dynamic power mode, since in dynamic mode, we will have to synchronize the TR_EN signals.

    Regards

    Savyan