Usually digital scopes work well up to fs=2.5 * bandwidth. So 100Ms/s is good for 100/2.5=40Mhz. The theoretical limit is Nyquist but for practical purposes you'll need some headroom for the anti-aliasing filter. your input is a sine wave (or generally, within the bandwidth limit), it's OK, yes.
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
Actual Wi-Fi signals aren't sent at a single frequency - they use a range of frequencies around it, and "20 MHz" / "40 MHz" describe the channel width, i.e. how large the frequency range actually is. The greater channel width, the faster you can transfer data, but at the cost of a 40 Mhz bandwidth can transfer more data, but it may cause
If you do a quick calculation, you'll quickly see that 14 bands of 20 MHz equals 180 Mhz. This is greater than the 100 MHz size of the 2.4 GHz band, which means that channels overlap. This is important to understand because overlapping Wi-Fi channels can interfere with one another.
Not all client devices support 40MHz channels, so don't enable 40MHz-only mode. Devices that support only 20MHz channels can't connect to a Wi-Fi router in 40MHz-only mode. Similarly, don't enable 80MHz-only mode, or only clients capable of 802.11ac will be able to connect. Routers that don't support 40MHz or 80MHz channels do support 20MHz
Bandwidth: 80 Mhz I am really confused about the bandwidth and which one is better. I found some articles that say to use 80 Mhz but Asus support recommend 20 Mhz. There are hardly any neighbors next to me with 5G networks. My 2.4 Ghz network is set to 40 Mhz bandwidth and set to use ch. 11. 802.11ac channels can be 20 MHz, 40 MHz, 80 MHz, and 160 MHz wide. With 802.11ac comes a new channel naming convention that makes referencing these extra-wide channels easier. Instead of listing all channel numbers, channels are numbered by their channel number center. This new naming convention for 802.11ac makes older naming conventions 40 MHz Channel Width: Increased Throughput. The 40 MHz channel width doubles the available bandwidth compared to the 20 MHz channel width. This wider channel allows for higher data transfer rates, making it suitable for applications that require increased throughput. .
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    • what is bandwidth 20mhz 40mhz