While holding those two keys down, turn the radio on.
Drop a comment below with your stock factory numbers if you are willing to share a baseline for the community! 👇 #AnyTone #AT5555NII #HamRadio #10MeterRadio #RadioMods 📸 Option 2: Short & Punchy (Best for Instagram/X)
The updated service menu groups calibration settings into specific operational categories. The exact terminology may slightly vary based on your specific firmware revision, but they generally follow this layout: 1. Frequency Calibration ( FRQ / REF ) anytone at5555n ii service menu updated
Before describing the menu, a strong warning is necessary. The Anytone AT-5555N II's service menu is not like the regular user menu and contains factory calibration parameters that are unique to each individual radio. Entering it without the proper test equipment, such as a frequency generator or oscilloscope, can have serious consequences.
The most commonly discussed service menu parameter is the . This specifically became relevant after Anytone released a new firmware version that introduced a new user-accessible "2k/4k FM.DEV" option. This feature, when toggled, can double the FM deviation amount that was previously set within the service menu. Therefore, if you had previously adjusted the FM deviation in the service menu, you might need to re-enter and dial it back slightly when using the new user menu option to avoid over-deviation. While holding those two keys down, turn the radio on
On some updated mainboards, the entry method has changed to prevent accidental entry:
On some newer units , the key combo changed to or requires a specific button sequence after boot. The exact terminology may slightly vary based on
Sets the baseline noise floor calibration. 4. TX Modulation & Deviation