Patent ID: 8608633

Claim:
A system, comprising: a first apparatus for applying magnetic field pulses to a subject, said first apparatus including: a generating unit configured to generate the magnetic field pulses; a first clock generator configured to generate a first clock; a clock output configured to output the first clock; a first control unit connected to said generating unit and to said first clock generator, and configured to trigger a generation of the magnetic field pulses by said generating unit with a fixed repetition rate based on the first clock; a second apparatus for recording electric signals of the subject, wherein the electric signals are received as analog signals from the subject while the magnetic field pulses are being applied to the subject, said second apparatus including: an analog-to-digital conversion unit configured to convert the analog signals to corresponding digital signals by sampling each of the analog signals with a sampling rate; a second clock generator configured to generate a second clock; and a second control unit configured to cause said analog-to-digital conversion unit to set the sampling rate based on the second clock; and a synchronizing unit connected to receive the first clock output from said clock output and configured to obtain the second clock from said second apparatus and control said second clock generator via a phase locked loop circuitry to continuously synchronize the second clock with the first clock.