Over time, or due to extreme temperature variations, the radio's internal reference crystal oscillator can drift slightly. This causes the radio to transmit or receive slightly off-frequency, which is especially noticeable as distorted voice audio on Single Sideband (SSB) modes. Sets the master clock frequency.
Ensure your bench power supply is delivering a stable 13.8V DC at a minimum of 15–20 Amps. Voltage drops during high-power testing will result in inaccurate calibration values.
Here are some of the most common adjustments people make in the service menu, along with the reasoning behind them. anytone at-5555n ii service menu
Use a high-quality, regulated DC power supply to prevent noise and voltage spikes.
: Within that 2-second window, release MENU and MODE, then quickly press these buttons in order: RB, NB, SCAN, MEM, EMG Over time, or due to extreme temperature variations,
This paper provides a comprehensive technical guide to accessing, navigating, and interpreting the service (alignment) menu of the AnyTone AT-5555N II multi-band mobile transceiver. Often referred to as the "hidden menu," this interface is critical for technicians performing maintenance, frequency alignment, and power calibration. This document outlines the entry protocols, delineates the function of key menu parameters, and discusses the implications of misconfiguration. The paper aims to serve as a standardized reference for radio service professionals and advanced amateur radio operators seeking to restore the device to factory operational specifications.
I can provide the targeted calibration steps for your exact scenario. Share public link Ensure your bench power supply is delivering a stable 13
: Alignment settings may differ depending on your current mode (AM, FM, USB, LSB, CW). Common Parameters : Adjusts the 10.24MHz Beat Frequency Oscillator (BFO).