模拟磁带重放信号数字化过程中的频偏校正技术及应用

Frequencydeviationcorrect Technology in Digitalizing of Replaying Signal from Analog Tape Recorder

模拟磁带重放信号中存在的频率偏移会对信号的处理分析产生不利影响。利用模拟磁记录器的多个磁道同时记录的能力,将实际信号和特定的参考信号同时进行记录,磁带信号重放和数字化过程中,利用这个参考信号来控制A/D采集时钟的速度,从而可在很大程度上减少磁带重放系统带来的频率偏移。实验结果表明,该技术方法能有效地解决模拟磁带重放信号中存在的频偏问题。

FrequencyDeviation exised in replaying signal from analog tape recorder will exert an negative influence on the telemetry signal processing and analysis.By use of the capability of simultaneous recording multichannel signals,recording the real time signals and a special reference signal simultaneously,the frequency deviation originating from the replaying tape can be reduced efficiently through controlling the rate of A/D clock by the replayed signal of this special reference.The experiment results demonstrate this technique effectively.