: If successful, the display should show "FM" (representing the factory menu) or a numerical setting. Navigating and Saving Settings
Note: If your hands have trouble hitting the buttons in time, radio operators frequently use custom-made multi-button alignment jigs, such as a wooden alignment tool. 🛠️ Key Calibration Parameters Explained
Fine-tunes the sensitivity of the squelch circuit for different modes. anytone at5555n ii service menu updated
Use this first to get as close as possible to the center frequency before fine-tuning other settings. BFO Adjustment:
I can provide specific step-by-step instructions to help you fix the problem safely. Share public link : If successful, the display should show "FM"
To get the most out of your AnyTone AT-5555N II service menu without causing damage, adhere to the following bench-testing protocols:
Before changing a single digit, write down your factory default values on a piece of paper or take photos of the screen. Use this first to get as close as
Immediately after power-up, release them and on the top row in order (starting from DW and moving toward EMG ). The screen should display "FM" (Factory Menu). Common Service Menu Adjustments
| Parameter | Function | Default Value | What it controls | | :--- | :--- | :--- | :--- | | | VCO Lock Voltage | 2.5 – 4.0V | Do not adjust unless VCO unlocks. | | P-02 | PLL Reference Freq | 0 | Fine frequency calibration (TX/RX offset). | | P-03 | AM Carrier Level | 15 – 25 | Adjusts dead-key carrier for AM mode. | | P-04 | AM Modulation Limit | 90 – 95 | Max percentage of AM modulation. | | P-05 | SSB ALC Max | 80 – 95 | Prevents splatter on sideband. | | P-06 | FM Deviation | 20 – 30 | Sets narrow/wide FM shift. | | P-07 | High Power Scale | 100 – 120 | Digital power amp gain (MOSFET drive). | | P-08 | Low Power Scale | 20 – 40 | Minimum power output floor. | | P-09 | S-Meter Zero | 0 | Calibrates S9 signal reading. | | P-10 | Squelch Threshold | 5 – 15 | Minimum open point for SQL knob. |