DZ701型仪器有一种“通病”,即“压制延迟继电器动作感应”。当放大器加有桥控电压时,只要压制延迟继电器动作,就会产生一串低频感应,如下图: 以上记录是在增益为-6分贝的情况下录制的。有时压到-18分贝不能解决问题。这种感应的确给工作带来许多麻烦,甚至影响记录质量(由其在做折射时)。《半导体磁带地震仪调校经验汇编》一书中也提到这种感应,但是没有给出有效的解 DZ701-type instrument has a “common problem”, that is, “suppress the action of the relay delay relay.” When the amplifier plus bridge voltage, as long as the suppression of the delay relay action, it will produce a string of low-frequency induction, as shown below: The above record is recorded at a gain of -6 dB. Sometimes pressure to -18 dB can not solve the problem. This type of sensing does cause a lot of hassle to the job and can even affect the quality of the recording when it is refracted. This induction is also mentioned in the “Compilation of semiconductor tape seismometers”, but does not give an effective solution