Ensure your DC power supply is delivering a stable 13.8V. Do not let the radio overheat while testing continuous carrier modes like AM or FM.

is a powerful, feature-rich 10-meter radio that has garnered significant attention from amateur radio operators and CB enthusiasts. It offers impressive performance out of the box, including high power output, a clear display, and robust modes such as AM, USB, LSB, and PA. However, for power users looking to fine-tune their radio for maximum performance, unlocking the hidden is a crucial step.

If your AT-5555N II is slightly off-frequency, particularly on SSB (USB/LSB):

Once inside, you'll use the to scroll through all the parameters (e.g., CH-01, CH-02...). Interestingly, to edit a parameter's value, you must press and hold the PTT (Push-to-Talk) button on the microphone while turning the VFO knob to adjust it up or down. Releasing the PTT button will likely save the new value.

Be aware that performing a factory reset can drastically change your radio's configuration. It's best to avoid a reset unless you have a full record of your radio's settings and a programming cable to restore them.

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: Release the PTT to save the new value for that specific menu item. Exit : Turn the radio OFF to exit the service mode. Key Service Menu Items Setting Name CH-17 AMPOWL

: Use the channel selector knob to change the value of the selected setting.

Use the Channel Selector knob to move through the numbered settings (e.g., 01 to 59).

The Anytone AT-5555N II service menu offers a range of options, including:

For more information on the Anytone AT-5555N II, its features, and service menu, consult the following resources:

Note: Navigation is typically handled by rotating the knob, and changes are saved by pressing the FUNC or PUSH knob. Key Service Menu Parameters Explained

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The Anytone AT-5555N II service menu provides a wealth of advanced settings, calibration options, and diagnostic tools to optimize and customize your device. By following the steps outlined in this article, you can access and navigate the service menu with confidence. However, be cautious when making changes and ensure you understand the implications of modifying advanced settings. With the service menu, you can unlock the full potential of your Anytone AT-5555N II and enjoy enhanced performance, features, and reliability.