# playing with radio waves the walkie talkie I have on channel 1 broadcasts on 462.534 Mhz (accoring to the RTL-SDR I have) set the mode to "narrow FM" 1: 462.534.3 Mhz 2: 462.559.7 Mhz 3: 462.584.5 MHz to get real frequency, add 28.2 to these numbers. I looked up the real numbers, and my SDR seems to be out of tune by 28.2 KHz