Anytone At-5555n Ii Service | Menu !exclusive!

Note: On some firmware revisions, the button combination may be FUNC + SCAN. If the above procedure fails, utilize the secondary combination.

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| Parameter (Channel) | Common Label | Function & Typical Adjustment | | :--- | :--- | :--- | | | RFG | RF Gain Calibration. A well-known adjustment for radios with high receive noise. The typical default is 86 . Increasing this value (e.g., to 105 ) can reduce the noise floor and make listening more pleasant but reduces the effective RF Gain control. | | CH-?? | TONE | Modulation Tone. There are separate parameters for AM, FM, USB, and LSB (e.g., AMTONE , FMTONE , USBTONE , LSBTONE ). Adjusting these changes the transmit audio's tonal balance. | | CH-?? | RXBPF | Receive Band-Pass Filter. The default is often 255 . Increasing this value can make the received audio sound "fuller" and less "thin" or "far away". | | CH-?? | TX Low Power (AM/FM/SSB) | Transmit Power on Low Setting. Adjusts the carrier or power output for the low power setting on each mode. | | CH-?? | TX High Power (AM/FM/SSB) | Transmit Power on High Setting. Adjusts the maximum power output for the high power setting. | | CH-?? | Frequency Calibration | Frequency Alignment. Sets the reference frequency for the entire radio, requiring precise measurement with a frequency counter. | | CH-?? | S-Meter Calibration (S9) | S-Meter Adjustment. Calibrates the point at which the meter reads S9 for a given signal strength. | | CH-?? | Modulation Limiter (AM) | AM Modulation Depth. Sets the maximum percentage of AM modulation, often to prevent flat-topping or overmodulation. | | CH-?? | ALC (Automatic Level Control) | Transmit Level Control. Adjusts the ALC to control the maximum transmit level across all modes. |

: If successful, the radio will enter the Service Mode, often starting at a specific channel setting like CH-52 (RFG) Key Menu Settings & Operations anytone at-5555n ii service menu

If your radio reports an "S9" signal on an empty channel, or fails to register strong incoming signals, the receiver calibration parameters can fix it.

Write down the original value of every setting you change. Do not adjust anything unless you own a calibrated frequency counter, a watt meter with a dummy load, and an oscilloscope (for modulation).

Some users have reported a high noise floor on certain production runs of the AT-5555N II. While some have explored the to address this, it is strongly advised against unless you have a signal generator. A safe alternative is to adjust the RFG (RF Gain) setting in the standard menu, which reduces the receiver's sensitivity to lower the noise floor. Note: On some firmware revisions, the button combination

The Anytone AT-5555N II service menu provides a wealth of advanced settings, calibration options, and diagnostic tools to optimize and customize your device. By following the steps outlined in this article, you can access and navigate the service menu with confidence. However, be cautious when making changes and ensure you understand the implications of modifying advanced settings. With the service menu, you can unlock the full potential of your Anytone AT-5555N II and enjoy enhanced performance, features, and reliability.

Anytone AT-5555N II Go to product viewer dialog for this item.

Rotate the Channel Selector knob (or use the microphone up/down keys) to scroll through the different hidden menu options. This link or copies made by others cannot be deleted

By understanding and carefully utilizing the AnyTone AT-5555N II service menu, you can ensure your transceiver operates at peak efficiency, stays perfectly on frequency, and delivers clean, crisp audio across all bands.

Before we type a single button combination, it is crucial to understand why this menu exists. The AT-5555N II is a precision analog/digital hybrid radio. Over time, temperature changes, component aging, or minor manufacturing tolerances can cause deviations in: