Used to resolve "S5-S7 noise" issues. Increasing this value (e.g., from 86 to 105) can quiet a noisy receiver.
: Ensure the radio is connected to a dummy load or an antenna to prevent damage.
Accessing the service mode requires a specific sequence of button presses during the power-on cycle. anytone at5555n ii service menu updated
If you are looking to unlock the full 11-meter and 12-meter bands (25.615 to 30.105 MHz), follow this separate procedure: Turn the radio . Hold [FUNC] and [EMG] and turn the radio ON . Rotate the channel knob to select "BAND 2" . Long-press [FUNC] until the display shows "rEND" . Power cycle the radio.
: Once the radio powers up, release the initial buttons and immediately press the following top-row buttons in order: [DW] , [RB] , [NB] , [SCAN] , [MEM] , and [EMG] . Used to resolve "S5-S7 noise" issues
: Use the Channel Selector knob to cycle through different menu items (ranging from 1 to over 50).
: With the radio OFF , press and hold both the [MENU] and [MODE] buttons. Power On : While holding those buttons, turn the radio on. Accessing the service mode requires a specific sequence
The is a high-performance 10-meter radio, but many of its most critical calibration settings—like power output and modulation—are tucked away in a hidden Service Menu . Because there is no factory "reset" for this specific menu, users must exercise extreme caution when making adjustments. How to Access the Hidden Service Menu