1. FM 是以 MHz 为单位的，动感101.7 是 101.7 M
2. 同轴电缆也是传输 RF 的频率，如 DVB-C 中使用的频段为 VHF, UHF, SHF
在有线数字电视中，用到的两种同轴电缆
| RG-59/U | 75 | 0.81 mm | Solid PE | 0.146 | 3.7 | 0.242 | 6.1 | single | 0.66 | Used to carry baseband video in closed-circuit television, previously used for cable television. Generally it has poor shielding but will carry an HQ HD signal or video over short distances. |
|---|---|---|---|---|---|---|---|---|---|---|
| RG-60/U | 50 | 1.024 mm | Solid PE | 0.425 | 10.8 | single | Used for high-definition cable TV and high-speed cable Internet. |
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