BW : 40MHz. มีความเร็วสูงกว่าเท่าตัว (150Mbps@1 Spatial Stream/300Mbps@2 Spatial Stream) ใช้แถบความถี่มากกว่าเท่าตัว ทำให้มีการถูกรบกวนสูงกว่าเท่าตัว. มีความไว All of this is important to take into account when the air gets crowded. It's the same reason why we should only use 1, 6 and 11 in the 2,4 range and stick to 20MHz wide. However, if you are alone, go for it. If someday you start to feel a degradation, switch back to a more conservative bandwidth. But enjoy while you can! Độ rộng kênh wifi có thể hiểu đơn giản là khoảng cách giữa các tần số trong dải tần số wifi mà tín hiệu wifi có thể truyền qua. Theo như thực tế, kênh wifi được chia thành các đoạn 20MHz, 40MHz hoặc 80MHz. Việc chọn độ rộng kênh Wifi phù hợp giúp tăng tốc độ Channel Width: Auto / 20MHz / 40MHz / 80MHz (ตอนนี้เป็น Auto) ผมใช้ Wifi Analyzer ดูแล้ว มีสัญญาณ Wifi ของข้างบ้านซ้อนกันเยอะมากครับ ขอบคุณครับ 在理论点说的话，"穿墙"单独对于20MHz和40MHz影响可能就是一个阴影衰落，不过实际上情况下，"墙"意味着可能会有更多的 多径效应 ，也就是反射更严重。. 多径有可能会造成 频率选择性衰落 ，这里在802.11n的时候，协议中有一个很神奇的设计叫做"非等价 Using Asuswrt-Merlin 376.48.1 on RT-AC68P. On the 5GHz wireless configuration options, the bandwidth can be set to 20MHz, 40MHz, 80MHz or what appears to be an auto setting of 20/40/80 MHz. Is 20/40/80 an auto setting? Is there an advantage or penalty for using 80 or 20/40/80? If the wifi point is set to support all modes, then the client will connect. In addition, the speed can be set to 20Mhz or both 20Mhz/40Mhz. It will use 40Mhz if available or fall back to 20Mhz otherwise. There is no 40Mhz only option. So just because the network offers 40Mhz, doesn't mean it stops support for the 20Mhz also. Jadi, perbedaan antara 20 MHz dan 40 MHz adalah throughput. 40 MHz memiliki throughput yang lebih tinggi dari 20 MHz berkat ikatan saluran. Ada kerugian pada ikatan saluran. bisa menentukan ukuran channel width dengan mempertimbangkan kepadatan frekuensi di area yang akan kita bangun link wireless. 2015-Apr-26 8:58 pm. If you're in a crowded environment, select 20 MHz for 2.4 GHz. It's unlikely that 5 GHz is as crowded, so feel free to use 40 MHz there. Upper or lower sideband just tells the Wi-Fi Analyzer Tool vs Channelizer. Signal strength is important when troubleshooting and diagnosing Wi-Fi related issues, but it isn't the only factor to consider. Channels are an often overlooked aspect of Wi-Fi networking. If there is enough interference from nearby Wi-Fi networks then you can find yourself with poor performanceand reduced OCBJh.