Menu Work — Anytone At5555n Ii Service

This guide focuses on the "Engineer" service menu, which offers granular control over RF performance, far beyond the standard user settings.

Step-by-step access:

These parameters allow for fine-tuning the radio's performance for different modes (AM/FM/USB/LSB): Google Groups : Adjusts the frequency of the 10.24MHz BFO : Controls the local oscillator offset fr0, fr4, fr5, fr9 : Used for fine-tuning anytone at5555n ii service menu work

Frequency Expansion (11m Mod): Turn off the radio. Hold FUNC and EMG while powering on. Use the channel knob to switch between BAND 1 and BAND 2, then press FUNC to confirm. This guide focuses on the "Engineer" service menu,

Mastering the Anytone AT-5555N II: A Deep Dive into the Service Menu and Calibration Work

If you own an Anytone AT-5555N II, you already know it is a powerhouse in the world of 10-meter and 12-meter amateur radio, as well as a favorite among freebanders. This radio is celebrated for its robust build, excellent receiver sensitivity, and the famous "N2" firmware improvements over its predecessor. Turn the radio OFF

  1. Turn the radio OFF.
  2. Press and hold the following three buttons simultaneously:

    Accessing the service menu on the AnyTone AT-5555N II allows you to adjust internal alignment settings such as frequency offsets and BFO (Beat Frequency Oscillator) calibration. Google Groups How to Access the Service Menu To enter the hidden service/alignment mode: the radio. Press and hold the button while turning the power Immediately press the following button sequence:

    Sets the "dead key" power level when the PWR knob is at maximum. #17 AM Low Power

    • PLL Reference Oscillator: The master clock (usually 12.288 MHz or similar). Adjusting this shifts all frequencies across every band. This is the most critical alignment.
    • High and Low Power Settings: Direct DAC (Digital-to-Analog) values for AM, FM, and SSB output power. Not just "Hi/Lo" but often a curve.
    • S-Meter Calibration: The voltage thresholds for S1 through S9+60dB.
    • ALC (Automatic Level Control): The limiter for SSB speech compression.
    • TX and RX IF Gain: The overall receive sensitivity and transmit drive levels.