Rotate the Channel Selector knob to change the numerical value of the selected setting.
: Alignment settings may differ depending on your current mode (AM, FM, USB, LSB, CW). Common Parameters : Adjusts the 10.24MHz Beat Frequency Oscillator (BFO).
This adjustment is considered a "workaround," not a fix, and many users report that the default RF Gain is simply "a bit too hot" from the factory. anytone at-5555n ii service menu
Adjusts the 10.24MHz Beat Frequency Oscillator (BFO).
Once active, navigating through parameters is achieved by pressing the button or rotating the primary channel selector ( CH ). The service environment is broken down into critical alignment fields: Parameter Code Description Functionality bfC BFO Coarse Alignment Rotate the Channel Selector knob to change the
The service menu, also known as the engineering menu or calibration menu, is a hidden menu in the Anytone AT-5555N II that provides access to advanced settings, calibration options, and diagnostic tools. This menu is designed for authorized service technicians, advanced users, and manufacturers to fine-tune the device, troubleshoot issues, and perform repairs. The service menu allows users to customize and optimize their AT-5555N II to meet specific needs, such as adjusting frequency ranges, modifying audio settings, and configuring advanced features.
| Parameter Range | Typical Function | Adjustment and Risk | | :--- | :--- | :--- | | (S1-S12) | Power Output by Mode These parameters control the radio's power output for each mode (AM, FM, SSB). | Adjusts final transistor biasing and overall power levels in different modes. Risk: Incorrect settings can distort the signal (splatter), overdrive amplifiers, cause harmful interference, and potentially damage the radio's final amplifier transistors. | | Items 40-52 (CH40-CH52) | S-Meter Calibration (e.g., AF RS1, UL RS1, RFG) These control the accuracy of the received signal strength indicator (S-meter) across different levels (S1, S3, S5, S9, etc.) and frequencies. | Calibrates the analog-to-digital conversion for the S-meter. Risk: Requires a calibrated, precise RF signal generator. Without one, changing these will permanently ruin your S-meter accuracy, making it impossible to correctly assess signal strength. | | Items 53-59 | Frequency / BFO / VCO Calibration These settings adjust the Master Oscillator, Beat Frequency Oscillator (BFO), and Voltage-Controlled Oscillator (VCO) to ensure transmit and receive frequencies are accurate across the entire band. | Tunes the PLL and BFO for proper frequency synthesis and USB/LSB demodulation. Risk: Requires an accurate, calibrated frequency counter. Incorrect adjustments will result in your transmit frequency being off, making you impossible to tune in on SSB, and your receive audio will sound garbled as the BFO will be at the wrong pitch. | This adjustment is considered a "workaround," not a
: Adjusts the frequency of the 10.24MHz Beat Frequency Oscillator (BFO).
: Changing values in the service menu without proper test equipment (like a frequency counter or signal generator) can significantly degrade the radio's performance or cause it to operate off-frequency. Google Groups alignment values for SSB or CW modes to help center your frequency? Anytone 5555n Ii Service Menu - Google Groups
Used to calibrate the carrier frequency for different modes (USB, LSB, CW). AMC / Modulation
