雷达测速仪是利用多普勒测速原理，获得运动目标的频率偏移信号。
Police traffic radar USES the theory of Doppler speed detection to measure the offset of the frequency.
若开关、互连电缆和测试夹具没有合适的屏蔽，所产生的杂散信号（偏移）将威胁到被测信号。
Without proper shielding of the switches, interconnecting cables, and test fixturing, spurious signals (offsets) may be generated that will compromise the signal being measured.
为了获得准确的结果，偏移电流技术指标必须小于被切换的信号电流。
To achieve accurate results, the offset current specification must be smaller than the signal current that is being switched.
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