
We'll explain in easy to understand language what all of these functions are for, and how to correctly use them. Research which radio has these features first. Some radios do not have the SWR calibration knob and instead will automatically calibrate your meter (not the antenna!). Many Cobra CB's, like the Cobra 29 LTD Classic and the Cobra 29 LX, have both a switch, or a button, and an SWR CAL knob. This testing process revolves around something called "S.W.R." or Standing Wave Ratio. It's an extremely useful function to have as it can make your system work well. Thanks for stopping by, we're hopeful this article can prove helpful! Many CB radios have a built-in meter for testing your antenna system. How to Tune a CB Radio What is SWR and the SWR CAL for? SR/F for normal operation, SWR/CAL for antenna testing
