modulation frequency limitation

例句：

1. 1.The radio signal was limited by the modulation frequency.
   无线电信号受到调制频率的限制。
2. 2. The device's performance is severely limited by its modulation frequency.
   该设备的性能严重受限于其调制频率。
3. 3. The transmission speed of the signal is limited by the modulation frequency.
   信号的传输速度受限于调制频率。