频率误差测试（Frequency Error Measurement）调制方式：未调制信号测试信道：802.11b第14信道测试电压：高，中，低（如为适配器供电，且没有电池，可以只测试常压）测试设备：...
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The measurement error of differential absorption laser radar caused by the shift of its center frequency in measuring atmosphenc density has been discussed particularly.
详细地讨论了微分吸收激光雷达测量气体密度时中心频率的漂移所引起的测量误差。
This paper proposed the theory of digital counting instantaneous frequency measurement and analyzed the error of frequency measurement.
文章介绍了一种用直接数字计数测量瞬时频率的原理，并进行了测频误差分析。
The phase detecting error caused by local oscillator frequency drift and non-synchronization of measurement signal and gate signal is eliminated and the measurement speed is improved at the same time.
该方法可以有效的消除因本振信号频率漂移及闸门信号与被测信号的非同步引起的测相误差，同时提高了测量速度。
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