UV-K5 spectrum analyzer functions

1 / 7 - increases/decreases frequency step between consecutive bars
4 - toggles the number of bars (channels) in the graph
2 / 8 - increases/decreases frequency step size by which the graph is scrolled with UP/DOWN buttons
5 - shows a frequency input box for lower sweep frequency (value in MHz, * - decimal point)
3 / 9 - increases/decreases maximum dB value (vertical scale)
6 - toggles receiver bandwidth
* / F - increases/decreases squelch level
0 - toggles modulation type (FM/AM/USB)
Side Button I - excludes current frequency from the spectrum scan
Side Button II - toggles backlight
EXIT - exits to a previous screen/function
PTT - switches screen to detail monitoring of last received frequency