At-5555n Ii Service Menu ((install)) | Anytone

Disclaimer: Accessing and modifying settings in the service menu can permanently alter your radio's performance. Incorrect adjustments can damage the transmitter, distort your audio, or cause the radio to transmit outside of legal specifications. Proceed at your own risk. It is highly recommended to record all original factory values before making any changes. What is the Service Menu?

Used to calibrate the BFO and local oscillator if the radio is off-frequency. Anytone 5555n Ii Service Menu - Google Groups

If an accidental alignment value compromises the operational integrity of the radio, perform a global factory reset to restore standard operating baselines: Turn off the radio. Press and hold both the and SCAN keys simultaneously. Turn the radio on.

: Aligns the S-meter to read exactly S9 when a standard -73 dBm signal is injected into the antenna jack. anytone at-5555n ii service menu

Testing and rollback

For operators looking to optimize audio punch without over-modulating or introducing splatter across channels:

After adding a preamp or external attenuator, you can realign S-9 to restore meter accuracy, helping you judge signal reports realistically. Disclaimer: Accessing and modifying settings in the service

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While holding those buttons down, turn the radio on.

The Service Menu is organized into parameter blocks. Here are some of the most useful ones (naming may vary slightly by firmware version): It is highly recommended to record all original

Many YouTube influencers will tell you to max out every value (PWR HI = 255, MOD AM = 255). This is reckless. The digital settings correspond to analog voltages. Setting "255" on a parameter that expects a sine wave output will result in a square wave—burning your finals instantly.

To access the service menu on the AnyTone AT-5555N II, you must perform a specific sequence of button presses during power-on. This "hidden" menu is primarily used for alignment, such as fine-tuning the frequency or adjusting the Local Oscillator (LO) Google Groups Accessing the Service Menu the radio. Press and hold the button while turning the radio Immediately release and then press the next three buttons in quick succession:

Unlike the standard menu, which is accessed by pressing the Menu knob, the service menu requires a specific button combination during power-up. Turn the radio .