Anytone At-5555n - Ii Service Menu

Capable of reading up to 30 MHz with high precision to verify the reference oscillator.

Once inside, the navigation logic changes from standard operation:

Professional technicians typically use calibrated frequency counters and power meters when accessing these settings to ensure the device remains within manufacturer specifications. Technical Parameters in the Anytone AT-5555N II anytone at-5555n ii service menu

While holding those two buttons down, turn the volume/power knob clockwise to switch the radio on.

To access the factory service (hidden) menu on the Anytone AT-5555N II, you must perform a specific button sequence during startup. This menu is used for internal hardware calibrations and should be used with extreme caution. Access Procedure : Ensure the radio is powered OFF. Capable of reading up to 30 MHz with

Once you have adjusted a setting, press and hold the FUNC key or power the radio off and back on. This writes the new values to the EEPROM memory. Key Service Menu Parameters Explained

Modifying settings in the service menu directly alters the radio's firmware calibration values. To access the factory service (hidden) menu on

Incorrect values can cause components to overheat, distort your transmitted audio, or permanently damage the final output transistors.

) signal into the antenna jack (e.g., -73 dBm for S9) and adjust these parameters until the digital meter displays exactly S1 or S9. 5. SWR Meter Calibration (SWR)

This setting adjusts the reference oscillator to ensure the radio transmits and receives exactly on-frequency. Over time, or due to temperature fluctuations, a radio can drift off-frequency (especially noticeable on SSB modes).