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通过对副载波恢复电路各环节的试验研究,将其捕捉范围做到了大于±500Hz。解决了解码器锁相电路捕捉范围窄的问题。
Through the experimental study of each part of the subcarrier recovery circuit, the range of its capture is greater than ± 500Hz. Solve the problem of narrow capture range of the decoder phase-locked circuit.