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Maybe I didn't express clearly. 10KHz isn't the bandwith of ultrasonic signal,which is the frequency of envelope of modulated signal.
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That is still not clear to me. Can you describe how you are generating the ultrasonic pulse. Are you amplitude modulating a 2.5MHz signal with a 10kHz sinusoid? Is this continuous, or pulsed? If its pulsed, what is the pulse length?
Is your hardware responsible for generating the transmit signal and the received signal? If you are, then this will make the system design easier, since the 2.5MHz carrier will be in common. If you do not control the transmitter, then can you use a common reference, so that your transmitter and receiver can generate 2.5MHz references relative to the same reference?
Cheers,
Dave
Honored Contributor
