I'm a beginner, and I recently purchased two handheld radios. Recently, I also bought a Senhaix 8600 Pro, and during use, I found that the 8600 Pro cannot receive any response from local U-band repeaters even when set up in the same way (I tested several U-band repeaters, and they all had the same issue). The V-band repeater works normally and can receive a response, but the Senhaix UVK6 has no problems. I would like to ask for advice from experienced users on what might be causing this.