4 ms·Now I'm trying to remember if the radios have TX lights that would help show that you are transmitting...by leetrout 7y agoNow I'm trying to remember if the radios have TX lights that would help show that you are transmitting...briandear 7y agoG1000/G3000 radios do. TX and RXkitteh 7y agoG1000 will disable tx if you are transmitting for 35 seconds straight I think as a way to mitigate a stuck mic.ddoolin 7y agoYes, even many old school radios will have something that indicates transmitting or not.