Hold the PTT and rotate the Channel Selector or VFO knob to adjust the value up or down.
Before we type a single button combination, it is crucial to understand why this menu exists. The AT-5555N II is a precision analog/digital hybrid radio. Over time, temperature changes, component aging, or minor manufacturing tolerances can cause deviations in:
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Compare the service menu to the .
This article serves as a guide to understanding, accessing, and navigating the service menu, enabling you to calibrate BFO (Beat Frequency Oscillator), adjust SSB (Single Sideband) fine-tuning, and optimize the local oscillator. Technical Overview and Safety Considerations
AnyTone AT-5555N II Go to product viewer dialog for this item.
Change values by one or two digits at a time. Drastic jumps can cause components to draw too much current and blow internal fuses or damage the final transistors.
When accessing and navigating the service menu, be aware of the following: anytone at-5555n ii service menu
This guide covers everything you need to know about the Anytone AT-5555N II service menu, including how to access it, what the settings mean, and how to safely adjust them. Warning: Proceed with Caution
⚠️ The service menu contains critical calibration data. Incorrect settings can render the radio inoperable, cause it to transmit on illegal frequencies, or violate FCC/Ofcom regulations. Proceed at your own risk.
The Service Menu isn’t a set of regular user options (like RF gain or mic gain). Instead, it’s a protected diagnostic area used at the factory to calibrate:
The AnyTone AT-5555N II service menu is a powerful diagnostic and calibration tool, not a toy for "free power." When used with proper test equipment (frequency counter, watt meter, dummy load), it can resurrect a radio that has drifted off frequency or fix low modulation. Hold the PTT and rotate the Channel Selector
While the service menu covers many settings, some hardware adjustments still require physical access to the radio's circuit board. This includes components like VRs (variable resistors) for functions such as ASQ (Automatic Squelch) and SSB power. This level of adjustment is for advanced users only.
Performing a standard user-menu reset will not restore the service menu to factory defaults.
Note: On some firmware versions, the entry method may be slightly different (e.g., holding LCR/MODE instead of BAND). If the above fails, try FUNC + MODE + Power.