测试信号电平 test signal level 传真信号电平 facsilinile signal level; facsimile signal level; facsimile-signal level ..
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Realistic device characteristics can be analyzed under actual operating conditions by varying the test frequency, test signal level, and dc bias.
切合实际器件特性可以分析根据实际营运情况，由不同检测频率，测试信号水平和直流偏置。
Test results demonstrate that this system can increase the accuracy of railway frequency-shift signal detection effectively, and has high integration level and reliability.
测试结果表明本系统能有效地提高铁路移频信号检测的准确度，具有高集成度和高可靠性。
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