Microwave ovens operate in the 2.4 GHz band, and typically create a mountain-like shape in the Density View. Channel changes will be noticeable in the amplitude history or waterfall.
Cordless phones may change their frequency each time they are used. Some may create a constant spike in amplitude, while others may frequency hop across the entire spectrum. Not all cordless phones create the same pattern in the spectrum. It isn't until many Bluetooth devices are active simultaneously that you are likely to see problems with your WiFi.
However, Bluetooth devices are relatively low-powered and hop very quickly, and will have limited impact on WiFi devices. These devices are frequency hoppers that impact all channels, so you can't move your WiFi to avoid their transmissions. Bluetoothīluetooth devices are active in the 2.4 GHz band. If you are having trouble identifying a transmitter's signature, look through these examples to try to figure out what it is.
Since they all look a little bit different, we can use these signatures to identify what kind of device is transmitting, which makes tracking things down a lot easier. Most transmitters in the 2.4 and 5 GHz bands make a unique shape, or "signature".
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