What is the best way to transmit analog signals between 100 Hz and 100 kHz over a distance of up to 6000 m with minimum frequency depending loss, the level is 50 uV to max 1V (always less than 100 mV above 10 kHz). I consider using a coaxial cable (50 Ohm or 75 Ohms) to route the signal. Shall the cable be considered a transmission line? Should I use impedance matching in both ends?
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