Over the past few days, I have followed the suggestions from several experts and systematically checked each issue. Today, I have confirmed that I can successfully perform FT8 operations. Below, I will share the problems I encountered and their solutions for your reference:
Solution
1. If the radio does not have any special settings, it is recommended to restore it to its factory default settings and then download the latest firmware released on September 15, 2024, from the official website for updating.https://www.cqxiegu.com/zlxz)
2、Attach a magnetic ring to all connecting cables.

3. Note that JTDX is listening on VFOA, but does it switch to VFOB channel for transmission? This might be due to previous incorrect settings. It's possible to configure JTDX.(Lock Tx = Rx)In the diagram, the blue arrow section – the simplest solution is to restore it to factory settings. The green arrow's power number will be displayed during transmission, but I always see 50W, even though my actual output is only 5W...

Problems encountered since installing rack number 4
On the 4th, while setting up an outdoor station, I observed that JTDX could receive signals but failed to send any replies, and also noticed that the computer's case was live.
In the afternoon of the 5th, I took an extra data cable based on the suggestions from everyone, and then observed the waterfall chart and power levels during transmission. Everything was fine (except for the incorrect frequency!), but after trying twice, I realized that it was due to receiving and transmitting at different frequencies. Therefore, I adjusted the JTDX.(Lock Tx = Rx)After successfully connecting to two other stations, I suddenly received error messages for audio input and output. Changing the cable didn't help, and I couldn't find a USB audio interface in the settings either. After struggling for a while, I gave up and went home. I then updated the firmware and attached a magnetic ring to the cable.
After using the new firmware again in the afternoon on the 6th, there were no further errors reported. Once connected, all breast implants were successfully activated.
I hope everyone has a great time playing!