Many units come with or can be upgraded to Goshante's ATS_EX firmware or similar versions, which unlock deeper settings:
Press until the screen reads LSB (used below 10 MHz) or USB (used above 10 MHz). ats20 radio manual better
If a signal is overpowering and sounds distorted, check your firmware settings to switch from Auto Gain Control (AGC) to manual attenuation. Advanced: Firmware Upgrades Many units come with or can be upgraded