push button multi-frequency signal的用法和樣例：
例句
- The signal applied here mixes with the oscillator current, causing an amplitude-modulated RF signal to appear at the plate.
信號從此輸入並與振蕩電路交連，形成調製了的射頻信號並由屏極輸出。 - This paper investigates the problems about the base-band signal shaping and the multi-rate signal processing of the radio-frequency signal.
本文對基帶信號的成形和射頻信號的多速率處理進行了研究。
