20MHz channel 800ns GI 130Mbps. 20Mhz channel 400ns GI 144Mbps. 40MHz channel 800ns GI 270Mbps. 40Mhz channel 400ns GI 300Mbps. Smaller guard interval more bandwidth. Also if you double the channel width you get slightly more throughput than simply doubling the data rate as the bit where the two channels join is used more efficiently.
The most obvious factor when choosing an oscilliscope is bandwidth. 50MHz is better than 20MHz, and 100MHz is definitely better than 50MHz, etc., but what does that number really mean, and how fast is fast enough for your needs? They're both capturing the 3.3V 40MHz pixel clock of a large (800×480) TFT LCD, and the frequency is the same
If you're using 2.4 GHz, the answer is simple. The best bandwidth for 2.4 Ghz is 20 MHz. In the majority of cases, using wide widths on 2.4 GHz isn't worthwhile. The performance tradeoffs from interference on overlapping channels will likely outweigh the throughput benefits.
Products using this technology can operate over both bands using 20MHz wide channels. Channel width is very significant. The greater the width, the better the information transfer rate and, as a result, the faster the connections. However, having a wider channel has its drawbacks: it means increased radio frequency space occupation within a band.
Dalam panduan ini kita akan menemukan apa artinya WiFi 20 MHz atau 40 MHz dan cara mengkonfigurasi jaringan nirkabel; Kami akan menemukan bahwa kecepatan maksimum tidak selalu merupakan jalan terbaik menuju koneksi yang stabil.I know of at least three bandwidth fields in the various fields; there are likely more: wlan_radio.11ac.bandwidth radiotap.mcs.bw wlan_radio.11n.bandwidth. Check the different fields and you will see different strings. But in your case the one field only tells you 40MHz, the other field tells you more, which 20MHz channel is primary.sXEN. 407436145157284141197234362
