In addition, there are instruments to prevent the leakage of good signalshielding.
此外，仪器还有防止信号泄漏的良好屏蔽。
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It would also need good shielding and special electronics to filter the DSSS signal from the radio-noise created by the Earth, the sun and the rest of the galaxy.
Electrostatic shielding is provided by surrounding the signal path with a conductor connected to a low impedance point in the circuit, preferably the lo input terminal of the measuring device.