Hi Yorick,
The max frequency of the TX-SDK-V2 is 15MHz, limiting by the LM96550. The amplitude at the output of the LM96570 is 3.3Vpp, at the output of LM96550 is up to +/-50Vpp (depending VPP and VNN) and at the output of the LM96530 is clamp to +/-0.7Vpp. The T/R switch is use to protect the receiver from the high voltage transmitter by clamping the signals to +/-0.7Vpp. If the input signals of the LM96530 is higher than +/-0.7Vpp, the output will clamp to +/-0.7Vpp. Other wise, the input signals is pass thru the output.
Regards,
Charles