How to switch power supply between two sensors
OK I'll take a stab at an answer.  I don't know what you have on the receiver end but I'll assume an opamp.  (with +/-15 V rails.)  Then if you could keep the pulse down below 30V p-p you'd be all set.  The problem will be if you have to go to higher voltages.  You can then either protect the input (to the reciever opamp) from the high voltage.  The typical series resistor and diodes to the supply rails.. or by some other scheme.  The other option would be to switch between the Tx and Rx channels.  I think you can do this with a solid state relay (SSR).  But I'm not sure about finding a SSR that works at 2 MHz.  I don't think that would be a problem but I just don't know.  You could also perhaps use mechanical relays, though I don't know how fast they are... what's the settling time for a mechanical relay?  So I'd start with small &lt;30V pulses maybe that will be good enough.  (Turn up the gain on the receiver side.)