: Press and hold the FUNC key until the radio saves the changes and restarts into standard operating mode. Common Service Menu Parameters
Disclaimer: Modifying internal radio settings may void the manufacturer's warranty and can result in operations that do not comply with local communication regulations. Unauthorized adjustments to transmission power or frequencies can lead to interference with protected emergency or aviation frequencies, which may carry significant legal penalties.
Navigating the service menu parameters can feel like decoding a secret language. Below is a table of critical parameters commonly discussed in online communities, along with their descriptions. Always verify the function of a specific menu item on your radio before making any adjustment.
To save your changes and exit:
: Hold down the FUNC button and turn the radio on. While still holding FUNC, quickly press the following buttons in sequence: RB , then NB , then DW .
💡 Most people only need it to slightly lower dead key power for an amplifier, or to fix slightly off-frequency SSB transmit. If the radio is working fine – don’t touch it. Seriously.
Most users looking for the service menu want to adjust power output or fix a high noise floor. Here is how to achieve those goals, either through the standard menu or by safely using one service menu parameter. anytone at5555n ii service menu work
Sets the modulation depth for AM, ensuring clear, high-percentage modulation. 3. Receiver and Transmitter Calibration
There is no "reset" for individual service menu values; once changed, they are overwritten.
There is no official documentation for service menu settings. It is highly recommended to record original values : Press and hold the FUNC key until
Technicians use this menu to align the radio digitally without opening the chassis to turn physical tuning coils or potentiometers. Critical Safety Warning Before You Begin
When accessing and modifying settings in the service menu, it's essential to exercise caution:
: Connect the radio to a dummy load or an antenna with a perfect SWR before entering the menu to prevent damage during testing. How to Access the Service Menu Accessing the service menu on the AT-5555N II Navigating the service menu parameters can feel like
Write down every original hexadecimal or numerical value before changing it. There is no "factory reset" button that restores these specific calibration profiles.