That is a possibility but I don't know what the transmit code would be. I have the tone mode as tone, the tone sql defaults to 88.5, the DTCS code and the Rx DTCS code default to 23, the DTCS pol is NN, mode is FM and power is high. I tried to set the Tone sql to 67.0 but it reverted back to the default of 88.5. I am at a lost. So if anyone could help it would be much appreciated. The frequency that I am using on this is 464.5500. The full nomenclature for the Hytera is TC-518V OBR. Thank you.