| 释义 |
preselector
preselector (ˌpriːsɪˈlɛktə) n (Telecommunications) a system that automatically connects a caller to a free lineTranslations
preselector
preselector[¦prē·si′lek·tər] (electricity) Device in automatic switching which performs its selecting operation before seizing an idle trunk. (electronics) A tuned radio-frequency amplifier stage used ahead of the frequency converter in a superheterodyne receiver to increase the selectivity and sensitivity of the receiver. |