Hi guys,

I'm looking for a FSK or PSK modem (IC - for wired communication) which the "1" & "0" will be around 1MHz. I found HART modem IC, but the frequency is too low ( 1200Hz & 2200Hz ).
I can't have noise below 100KHz, and I can't go to very high frequencies because I can't use coax cable - I have only 2 wires for half-duplex communication.

The issue is very urgent; I hope you can help me,

Thank you,

 

CAN works pretty good at speeds up to 1 Mbit/sec. It has robust error detection and recovery. You can trade off link speed for cable distance.