Abstract
A microwave transceiver is described which is designed for remote sensing of high DC and AC voltages in applications where complete electrical isolation is required between the signal and the measurement system. The isolator was specifically designed for the measurement of voltages up to 30 kV DC on a CO2 laser where neither side of the supply was at earth potential. The isolator provided infinite isolation between the laser and the computer data acquisition system. The bandwidth of the system was sufficient to enable signals from DC to around 6 MHz to be transmitted across a laboratory (including a colour video signal). The unit is unusual in that it can transmit both true DC levels and high frequency signals with infinite electrical isolation.
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