My QMX was working fine and I made couple of QSO via FT8. However I noticed the receiver stop working:
1. I can still hear some strong signals.
2. When I plugin my attena, the S-meter in WSJT-x is not changed. keep in less than 10db. when it was working, it should be around 30-40db.
3. I use rs232 console to test RF filter, it show very large att.
I verified all bands are like this. Compare to operation guide, the Y-axis is significant small (-30db).
Any suggestions what I should check?
-Howard?
Howard Su