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Anytone At5555n Ii Service Menu Work Best -

Accessing the service menu on the AnyTone AT-5555N II allows you to adjust internal alignment settings such as frequency offsets and BFO (Beat Frequency Oscillator) calibration. Google Groups How to Access the Service Menu To enter the hidden service/alignment mode: the radio. Press and hold the button while turning the power Immediately press the following button sequence:

: Users have successfully used the service menu (specifically the

: Before changing any value, write down the original factory setting for every item. If you make a mistake without recording the original numbers, you may permanently decalibrate your radio.

You will find settings often labeled PO_A (AM), PO_F (FM), PO_S (SSB). anytone at5555n ii service menu work

Disclaimer: Modifying internal radio settings may void the manufacturer's warranty and can result in operations that do not comply with local communication regulations. Unauthorized adjustments to transmission power or frequencies can lead to interference with protected emergency or aviation frequencies, which may carry significant legal penalties.

Unlike the user-accessible function menu, the service menu is a factory-level alignment interface. It controls the underlying hardware calibration of the transceiver.

An accurate inline power meter (such as a Bird 43) to measure true RF output. Accessing the service menu on the AnyTone AT-5555N

: Performing a standard factory reset (holding FUNC + SCAN at power on) will not restore service menu values to their original state.

A: While unlikely, it's theoretically possible to corrupt the firmware by changing critical system parameters. This would require advanced hardware to fix. It's best to only adjust known, well-documented settings like RFG or RXBPF .

Sets the exact signal-to-noise ratio required to open the audio gate in different modes. If you make a mistake without recording the

Alternative Method : Some versions use a sequence of pressing all 6 buttons from to EMG after the initial boot. Key Settings and Navigation

To help tailor this information to your specific needs, let me know:

Press the FUNC key or power down the radio to save the changes to the EEPROM non-volatile memory. Critical Safety Warning: Look Before You Leap

Change only one setting, test the radio, and then move to the next. This makes it easy to identify which adjustment caused an issue.

: Ensure your DC bench power supply is delivering a stable 13.8V DC under load. If your power supply drops voltage when you transmit, your service menu adjustments will be inaccurate.