用于3g手机的带宽可能会进一步受到某些区域手机发射塔带宽的限制。
Bandwidth for 3g cellular may further be limited by cell tower bandwidth in some areas.
2007年10月发射了首颗卫星宽带系统，提高了高带宽的通信能力，支持美国军事行动。
The wideband system, with its first satellite launched in October 2007, increases the high-bandwidth communications capacity available to support U.S. military operations worldwide.
在这些情况下，可向开关加入滤波器来改变信号的频率带宽，或者从发射到DUT的信号中消除有害频率的杂散信号。
In these cases, filters can be added to the switch to modify the signal frequency bandwidth, or spurious signals at unwanted fre quencies can be eliminated from the signal to the DUT.
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