Well, I have not tried AM, but the 'logical' reason would be overmodulation.
Check the manual (and adjust modulation level)-
System parameter configuration
?
Personalized settings can be achieved for transceiver in system settings menu to make it fit your using habit in a
better way.
Operation methods:
1. Press and hold [MENU] key for 1s to enter system settings menu;
2. Press [<] and [>] multi-function keys at the bottom of screen to call out the menu items you want to adjust;
3. Rotate major knob to set parameters you wanted;
4. Press [SAVE] key in a short time to save current settings and exit menu mode after setting.
?? If pressing [QUIT] key in a short key in step 4 mentioned above, new settings will not be saved and the
equipment will exit menu mode of the system.
?
?
Descriptions of system menu
?
Menu items? Function description? Settable values? Default
#1? LCD? Backlight? Displayer backlight brightness
OFF¡«LEVEL5? LEVEL5
#2? LCD Contrast? Displayer contrast ratio
0¡«30? 30
#3? BEEP Volum? System prompt volume
0¡«100? 50
#4? CW? Tone? Volum? CW sidetone volume? 0¡«100? 50
#5? Key BEEP? Key prompt tone? OFF/ON? ON
#6? AM Mod Level? AM transmission modulation degree? 0¡«63? 60
--
Doug, K8RFT
