Anytone At-5555n Ii Service Menu Upd →

Requires attaching a known 100-ohm load (which creates a perfect 2:1 SWR) or 150-ohm load (3:1 SWR) to calibrate the internal standing wave ratio meter bridge. 4. Modulation and Deviation (MOD / DEV)

However, beneath the surface of its user-friendly LCD display and multi-function buttons lies a hidden layer of calibration: .

Press the FUNC key or cycle the power to save your new settings to the radio's EEPROM memory. Key Service Menu Parameters Explained

Immediately press the remaining buttons on the top row in order (starting with , then RB , NB , SCAN , MEM , and EMG ). The "FUNC" Sequence: Hold [FUNC] while powering on. Then press [RB] , then [NB] , then [DW] in sequence. anytone at-5555n ii service menu

To exit and save, turn the radio OFF and back on again normally. 3. Key Service Menu Settings and Calibration Procedures

⚠️ The service menu contains critical calibration data. Incorrect settings can render the radio inoperable, cause it to transmit on illegal frequencies, or violate FCC/Ofcom regulations. Proceed at your own risk.

Calibrates the peak envelope power (PEP) for Upper Sideband (USB) and Lower Sideband (LSB). 3. Modulation and Deviation (MOD / DEV) Requires attaching a known 100-ohm load (which creates

Press and hold the button and MODE button simultaneously. Turn the radio ON while continuing to hold those buttons.

The service menu is not an extension of the feature menu; it controls the fundamental physical operating parameters of your radio.

Rotate the main Channel Selector knob to scroll through the different menu functions. Press the FUNC key or cycle the power

Because the service menu is intended for technicians, the access sequence must be performed quickly during the startup phase:

While AnyTone occasionally updates firmware abbreviations, standard service menus for the AT-5555N II typically control the following critical stages: 1. Frequency Calibration (REF / FREQ)

This factory-level menu allows advanced users and technicians to calibrate internal hardware parameters without opening the radio chassis. ⚠️ Essential Warning Before You Begin

handles everyday settings like Roger Beep and Squelch levels, the service menu is where you perform critical alignments and adjust internal gain settings. How to Access the AT-5555N II Service Menu Accessing this menu requires a specific power-on sequence.