Anytone At5555n Ii Service Menu Updated |top| May 2026

Parameters P-11 through P-15 are now active, controlling AGC attack/release times and display brightness curves. The "Updated" Procedure for Frequency Calibration The most common reason to use the service menu is to correct frequency drift or align the radio to a frequency counter.

"My AM carrier is too high (10 watts), but the radio is set to low power." Solution: Go to P-07 (High Power Scale). Reduce the value from 120 to 85. This digitally reduces the drive voltage to the RD16HHF1 finals. Do not exceed 120. anytone at5555n ii service menu updated

| 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. | Parameters P-11 through P-15 are now active, controlling

Document your original settings before changing anything. Use a calibrated wattmeter, frequency counter, and dummy load. And finally—don’t transmit into a mismatched load while tweaking P-07. You’ve been warned. Reduce the value from 120 to 85

Now that you have the service menu map, go forth and align your AnyTone to perform better than the day it left the factory. Disclaimer: This article is for informational and educational purposes only. Unauthorized modification of radio transmitters may violate FCC regulations in the United States or local laws in your jurisdiction. Always operate within legal band limits and power restrictions.