| 释义 |
中频zhōngpín
1.在超外差收音机中,把射频信号变成预定信号,以便放大,这个预定信号叫做中频。{intermediate frequency; predetermined frequency in a superheterodyne receiver, into which signals carried by radio frequency change before they are amplified}
2.指300—3,000千赫范围内的频率。{frequency between 300-3,000 kHz.} |