Next was the power calibration. He keyed the microphone, watching the meter on the radio jump. The needle slapped the red zone instantly—dangerous. If he transmitted like that, he’d blow his final transistor, leaving him truly silent.

Once successfully entered, you will see a series of numbers and letters on the LCD screen instead of your normal frequency display. Navigating the Service Menu Layout

Many operators access the service menu specifically to adjust the or AM Modulation limits. While the stock audio on the AT-5555N II is generally excellent, adjusting these parameters can punch up your talk power:

If you want to fine-tune a specific parameter, tell me (AM, FM, or SSB) or what test equipment you have available (like a power meter or frequency counter) so I can provide step-by-step instructions. AI responses may include mistakes. Learn more Share public link

of known setting codes for frequency alignment or instructions for the PC programming software Anytone 5555n Ii Service Menu - Google Groups 24 Jul 2024 —

Once inside, rotating the navigates through the parameter columns, and the UP/DOWN buttons (or sometimes the VR knob depending on firmware) adjust the values.

AnyTone AT-5555N II service menu is an undocumented feature primarily used for fine-tuning frequency alignment and modulation. While users report it is effective for resolving specific issues like "S7 noise" on the S-meter, it is generally considered complex and carries a risk of misaligning the radio if not done carefully. Google Groups Service Menu Performance & User Feedback Audio Modulation Improvements

Release the buttons once the LCD screen changes to display the service menu parameters. Navigating the Menu

Are you looking to fix a like off-frequency operation or high background noise? Anytone 5555n Ii Service Menu - Google Groups