该方案的显著特点是：调制方式、调制速率、中频频率皆可编程设置。
The outstanding features of this plan lie in the programmable modulate mode, modulate rate, IF rate and so on.
中频频率和水平磁偶极子天线(垂直环状天线)是井下采区无线通信可使用的频段和天线型式。
Medium frequencies and horizontal magnetic dipoles (vertical loop antennas) can be used in underground radio communication in mining sections of coal mines.
介绍锻钢冷轧工作辊双频感应淬火设备特点，国内首创较低的中频频率的选定，与同类淬火设备比较的优点。
This paPer introduces the equipments of double-frequency induction heating the forged steel cold work roller, and compare with the same kind induction heating equipments.
提出了一个欠采样中频收发器的体系结构，它在中频数字化以前先通过欠采样将中频频率变到一个较低的频率。
A receiver architecture is presented that utilizes the subsampling concept to down-convert the IF signal to a lower IF before been digitized.
提出了一个欠采样中频收发器的体系结构，它在中频数字化以前先通过欠采样将中频频率变到一个较低的频率。
A receiver architecture is presented that utilizes the subsampling concept to down-convert the IF signal to a lower IF before been digitized.
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