Abstract: A cable for electrically connecting a plurality of seismic receivers to a central data collecting unit contains a single electrical channel. The output signal of each seismic receiver is used to modulate a carrier signal having its own distinct frequency. The plurality of modulated carrier signals are frequency division multiplexed onto the single electrical channel and transmitted to the central collecting unit. There, narrowband filters are used to demultiplex the individual modulated carriers so that the signals may then be demodulated to recover the individual seismic receiver signals. A feedback loop is used to bias the amplifier at the central collecting station so as to minimize cross-modulation distortion occurring therein.