PTY-8接收机鉴频器改造

REFORMATION OF FREQUENCY DISCRIMINATOR OF PTY 8 RECEIVER

ＰＴＹ－８鉴频器的改制，是为使仪器更好地适应地震预报与地震监测的需要而进行的，经室内测试标定和实际运行，表明改制后的ＰＴＹ－８鉴频器主要技术指标与工作性能已达到规范的要求。本文简述了改制后的ＰＴＹ－８鉴频器各部分的工作原理及其主要技术指标，给出了仪器标定和试验结果，并介绍了其与原ＰＴＹ－８鉴频器相比所具有的优越性。

To meet the needing of earthquake monitoring and prediction,we have reformed the frequency discriminator for PTY 8.Normal calibration test indoors and actual working show that its main technological indicator and working function are absolutely standard.This paper presents the main technological indicator and working principle of the new instrument,the results of instrument calibration and test,and the advantage over the old instrument.