If the short circuit has a very low thermoelectric EMF, this can be used to verify input noise and zero drift with time. 如果输入端的短路点具有很低的热电动势，用这种方法就可以验证输入噪声和零点随时间的漂移。
The limited sensitivity of present pulsar surveys and the greater frequency drift make the more distant pulsars difficult to observe. 目前脉冲星普查的有限探测灵敏度和大的频率漂移，使我们难以观测到更遥远的脉冲星。
