1.制订规程的主要依据计数器是常用的无线电、时间频率测量仪器、种类多,量大面广。在编制规程时,仍以电子工业部部标 SJ1457—79低速型、中速型通用电子计数器技术条件为主要编写依据。2.关于频率测量参考检定点由于 A 通道放大整形电路在某频点上可能会产生寄生振荡,使该点灵敏度降低,或为了 1. The main basis for the development of procedures Counters are commonly used radio, time frequency measurement instruments, types and quantities. In the preparation of the rules, the Ministry of Electronics Industry is still the standard SJ1457-79 low-speed, medium speed general electronic counter technology as the main basis for the preparation. 2 on the frequency measurement reference verification point A channel enlargement and shaping circuit may produce parasitic oscillation at a certain frequency, the sensitivity of the point to reduce, or for