modulation frequency VFT

例句：

1. 1. The modulation frequency ofthe signal is critical for communication.
   信号的调制频率对于通信至关重要。
2. 2. TheVFT of the deviceis 500MHz, which meets the requirements ofthe market.
   该设备的VFT为500MHz，符合市场需求。
3. 3. The VFT of the new model is higher thanthat of the old one, making itmore competitive.
   新款模型的VFT高于旧款，更具竞争力。