Here’s a detailed feature-style article on the AnyTone AT-5555N II Service Menu, written for radio enthusiasts, techs, and CB/Ham operators who want to unlock the full potential of their rig.
Key Parameters to Know (AT-5555N II)
Note: Your stock values may vary. Write them down before changing anything!
| Menu Item | Function | Typical Adjustment |
|-----------|----------|---------------------|
| S-01 | PLL Reference Frequency (Coarse) | Adjust for frequency counter accuracy |
| S-04 | AM Power (Low) | Sets carrier level on AM mode |
| S-05 | AM Power (High) | Sets peak AM power |
| S-07 | SSB Power (Low) | ALC threshold for low SSB |
| S-08 | SSB Power (High) | ALC threshold for high SSB |
| S-11 | FM Deviation | Sets FM modulation width |
| S-20 | S-Meter Zero (No signal) | Adjust until meter reads S0 with antenna disconnected |
| S-21 | S-Meter Calibration (S9) | Inject S9 signal (50µV) and adjust |
Quick-reference checklist for safe service-menu use
Record current values before edits.
Work on a stable power source.
Change one parameter at a time.
Test after each change.
Restore factory settings if behavior becomes unstable.
Stop and get professional help for RF/PA/PLL adjustments.
If you want, I can:
Provide the exact key sequence for your firmware if you tell me the firmware version shown in Menu → About, or
Draft a step-by-step service procedure tailored for a specific repair (e.g., low TX power) assuming common firmware.
Which would you prefer?
The AnyTone AT-5555N II Go to product viewer dialog for this item.
is a sophisticated, software-controlled 10-meter radio that relies on a "hidden" Service Menu for fine-tuning its internal parameters. Unlike older radios with physical potentiometers (pots), most adjustments for power output, modulation, and frequency alignment are handled through these digital menus. Accessing the AT-5555N II Service Menu
To enter the service menu, follow this specific power-on sequence:
Preparation: Ensure the radio is connected to a dummy load or a well-tuned antenna before making any changes.
Initial Key Combo: With the radio off, press and hold both the MENU and MODE buttons simultaneously while turning the power on.
Validation: All LCD segments will light up for roughly two seconds. During this brief window, release the MENU and MODE buttons.
Security Sequence: Quickly press the following buttons in exact order: RB, NB, SCAN, MEM, and EMG.
Note: Some versions may require a simpler sequence: hold MENU and MODE, power on, then press each button moving down the line starting with DW.anytone at-5555n ii service menu
Confirmation: The screen should display "FM" (Factory Menu), indicating you have successfully entered the service mode. Essential Service Menu Settings
Once inside, you can navigate settings using the Channel Selector knob. To view or change a value, press and hold the PTT (microphone key) while rotating the Channel Selector. Function & Recommended Usage Ch 16AMHI
AM High Power: Adjusts the maximum "dead key" power for AM mode. Ch 17AMPOWL
AM Low Power: Typically used to set the low power dead key to 1–2 watts for use with amplifiers. Ch 19 & 20MOD
AM Modulation: Controls the modulation swing. Lowering these values often increases modulation. Ch 52RFG
RF Gain: Calibrates the receiver's gain floor. The factory default is typically around 86. bfCBFO
Beat Frequency Oscillator: Adjusts the frequency for CW, USB, and LSB modes. loCLO
Local Oscillator: Controls the frequency offset. Adjust this first if the radio is off-frequency across all modes. Critical Safety Rules
Write Everything Down: Before changing any value, record the original factory setting for all 53+ items. There is no master reset that restores these individual calibration values once changed.
Dummy Load Required: Transmitting into an open circuit while adjusting power settings can permanently damage the radio's finals.
Incremental Adjustments: For modulation and power, change values in small steps and verify with an external wattmeter or oscilloscope.
The AnyTone AT-5555N II is a powerful 10-meter radio, but its deepest configuration options are tucked away in a hidden service menu . While the standard background function menu Here’s a detailed feature-style article on the AnyTone
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.
Always record your original values before making changes, as there is no "undo" button for these factory-level calibrations. Preparation : Turn the radio off. : Press and hold the buttons simultaneously.
: While holding these buttons, turn the radio on. All LCD segments will light up for roughly two seconds. Verification
: Within that 2-second window, release MENU and MODE, then quickly press these buttons in order: RB, NB, SCAN, MEM, EMG
: If successful, the radio will enter the Service Mode, often starting at a specific channel setting like CH-52 (RFG) Key Menu Settings & Operations
Once inside, you can navigate and adjust internal parameters: Navigation
: Rotate the channel switch or VFO knob to cycle through the menu items. Adjusting Values : To change a value, press and hold the PTT (Push-to-Talk) button while rotating the channel switch.
: Keying the mic allows you to check the current value for certain active settings. Common Settings CH-52 (RFG)
: Adjusts the RF Gain threshold. A common fix for high background noise (S5-S7) is tweaking this value (factory default is often around 86). Frequency Alignment : Includes settings like (BFO frequency), (local oscillator offset), and (fine-tuning limits). Google Groups Standard Menu vs. Service Menu For less intrusive changes, use the standard background menu by long-pressing the
key for 2 seconds while the radio is on. This allows for user-level adjustments like: device.report Beep/Roger Beep : Toggle sounds and frequency groups. : Total of 36 levels available. Mode Setup : Selecting between FM, AM, USB, LSB, and PA. device.report Anytone 5555n Ii Service Menu - Google Groups
Short how-to story: Accessing the Anytone AT-5555N II Service Menu
Tom needed to tweak his Anytone AT-5555N II handheld for better performance on a local repeater. He wasn’t a radio tech, but he wanted a safe, reversible change — nothing that would void warranty or break the radio.
Preparation
Tom fully charged the radio and set aside a quiet, well-lit workspace.
He downloaded the official user manual and saved his current CPS (programming software) configuration file to his computer so he could restore settings if needed.
He wrote down his radio’s firmware and hardware version from the CPS screen.
Entering service menu (safe approach)
Tom powered off the radio.
He held both the PTT and MONI (monitor) buttons while powering the radio on to enter a maintenance/service-like mode (note: specific key combos vary by model and firmware; consult the manual first).
The radio showed a special menu with versions and adjustable parameters. Tom navigated slowly, only viewing items he could identify: calibration values, battery calibration, and display contrast.
What Tom checked (and what he avoided)
Checked firmware and hardware versions to confirm compatibility with the CPS and any available firmware updates.
Looked at battery calibration numbers and contrast — safe, reversible changes.
Avoided altering RF power stages, TX/RX calibration offsets, or RF alignment values without professional equipment and documentation.
Did not change anonymous ID or serial-related fields.
Making a safe change
Tom adjusted display contrast and the key beep volume for comfort.
He saved the configuration, then exported the new CPS file to his computer.
Testing and rollback
He tested transmit and receive on known simplex frequencies at low power.
Everything worked; if something had been wrong, Tom was ready to re-import his original CPS file and reboot the radio.
Final notes and best practices
Always back up existing settings before entering service menus.
Only change parameters you understand; the service menu can contain calibration and RF settings that require specialized tools.
Use manufacturer documentation and firmware from official sources.
If unsure, contact an authorized service center.
If you want, I can:
Provide the exact button sequence for your firmware version (I’ll assume a common combo unless you give the firmware/hardware version), or
Draft a step-by-step checklist you can print and follow.
4. Critical Adjustments Explained
A. Adjusting RF Power (PO)
Enter the Service Menu.
Rotate the channel knob until you find the PO setting.
On the front panel, select the power level you wish to adjust (High/Mid/Low).
Use the Up/Down buttons to change the value.
Key the microphone to test power output on a dummy load.
Adjust until desired wattage is achieved.
B. Frequency Expansion (Unlocking)
If the radio is restricted to the standard 11m band (CB):
Find the MAX FREQ or BAND LIMIT setting in the service menu.
Adjust the lower limit (usually to 24.000 or 25.000) and the upper limit (usually 30.000 or 32.000).
Exit the menu. The radio will now allow transmission outside the standard 26.965–27.405 MHz range.
C. Frequency Calibration (TCXO)
If your radio is slightly off-frequency (people tell you you sound "bassy" or "muffled" on SSB):
Find the CAL or FREQ ADJ menu item.
Ideally, use a frequency counter or listen to a known standard (like WWV or a beacon).
Adjust the value until the signal
Title: Operational Analysis and Technical Procedures: Accessing and Interpreting the Service Menu of the AnyTone AT-5555N II
Abstract
This paper provides a comprehensive technical guide to accessing, navigating, and interpreting the service (alignment) menu of the AnyTone AT-5555N II multi-band mobile transceiver. Often referred to as the "hidden menu," this interface is critical for technicians performing maintenance, frequency alignment, and power calibration. This document outlines the entry protocols, delineates the function of key menu parameters, and discusses the implications of misconfiguration. The paper aims to serve as a standardized reference for radio service professionals and advanced amateur radio operators seeking to restore the device to factory operational specifications. Key Parameters to Know (AT-5555N II) Note: Your
Anytone At-5555n Ii Service Menu -
Anytone At-5555n Ii Service Menu -
Here’s a detailed feature-style article on the AnyTone AT-5555N II Service Menu, written for radio enthusiasts, techs, and CB/Ham operators who want to unlock the full potential of their rig.
Key Parameters to Know (AT-5555N II)
Note: Your stock values may vary. Write them down before changing anything!
| Menu Item | Function | Typical Adjustment | |-----------|----------|---------------------| | S-01 | PLL Reference Frequency (Coarse) | Adjust for frequency counter accuracy | | S-04 | AM Power (Low) | Sets carrier level on AM mode | | S-05 | AM Power (High) | Sets peak AM power | | S-07 | SSB Power (Low) | ALC threshold for low SSB | | S-08 | SSB Power (High) | ALC threshold for high SSB | | S-11 | FM Deviation | Sets FM modulation width | | S-20 | S-Meter Zero (No signal) | Adjust until meter reads S0 with antenna disconnected | | S-21 | S-Meter Calibration (S9) | Inject S9 signal (50µV) and adjust |
Quick-reference checklist for safe service-menu use
If you want, I can:
Which would you prefer?
The AnyTone AT-5555N II Go to product viewer dialog for this item.
is a sophisticated, software-controlled 10-meter radio that relies on a "hidden" Service Menu for fine-tuning its internal parameters. Unlike older radios with physical potentiometers (pots), most adjustments for power output, modulation, and frequency alignment are handled through these digital menus. Accessing the AT-5555N II Service Menu
To enter the service menu, follow this specific power-on sequence:
Preparation: Ensure the radio is connected to a dummy load or a well-tuned antenna before making any changes.
Initial Key Combo: With the radio off, press and hold both the MENU and MODE buttons simultaneously while turning the power on.
Validation: All LCD segments will light up for roughly two seconds. During this brief window, release the MENU and MODE buttons.
Security Sequence: Quickly press the following buttons in exact order: RB, NB, SCAN, MEM, and EMG.
Note: Some versions may require a simpler sequence: hold MENU and MODE, power on, then press each button moving down the line starting with DW. anytone at-5555n ii service menu
Confirmation: The screen should display "FM" (Factory Menu), indicating you have successfully entered the service mode. Essential Service Menu Settings
Once inside, you can navigate settings using the Channel Selector knob. To view or change a value, press and hold the PTT (microphone key) while rotating the Channel Selector. Function & Recommended Usage Ch 16 AMHI
AM High Power: Adjusts the maximum "dead key" power for AM mode. Ch 17 AMPOWL
AM Low Power: Typically used to set the low power dead key to 1–2 watts for use with amplifiers. Ch 19 & 20 MOD
AM Modulation: Controls the modulation swing. Lowering these values often increases modulation. Ch 52 RFG
RF Gain: Calibrates the receiver's gain floor. The factory default is typically around 86. bfC BFO
Beat Frequency Oscillator: Adjusts the frequency for CW, USB, and LSB modes. loC LO
Local Oscillator: Controls the frequency offset. Adjust this first if the radio is off-frequency across all modes. Critical Safety Rules
Write Everything Down: Before changing any value, record the original factory setting for all 53+ items. There is no master reset that restores these individual calibration values once changed.
Dummy Load Required: Transmitting into an open circuit while adjusting power settings can permanently damage the radio's finals.
Incremental Adjustments: For modulation and power, change values in small steps and verify with an external wattmeter or oscilloscope.
The AnyTone AT-5555N II is a powerful 10-meter radio, but its deepest configuration options are tucked away in a hidden service menu . While the standard background function menu Here’s a detailed feature-style article on the AnyTone
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.
Always record your original values before making changes, as there is no "undo" button for these factory-level calibrations. Preparation : Turn the radio off. : Press and hold the buttons simultaneously.
: While holding these buttons, turn the radio on. All LCD segments will light up for roughly two seconds. Verification
: Within that 2-second window, release MENU and MODE, then quickly press these buttons in order: RB, NB, SCAN, MEM, EMG
: If successful, the radio will enter the Service Mode, often starting at a specific channel setting like CH-52 (RFG) Key Menu Settings & Operations
Once inside, you can navigate and adjust internal parameters: Navigation
: Rotate the channel switch or VFO knob to cycle through the menu items. Adjusting Values : To change a value, press and hold the PTT (Push-to-Talk) button while rotating the channel switch.
: Keying the mic allows you to check the current value for certain active settings. Common Settings CH-52 (RFG)
: Adjusts the RF Gain threshold. A common fix for high background noise (S5-S7) is tweaking this value (factory default is often around 86). Frequency Alignment : Includes settings like (BFO frequency), (local oscillator offset), and (fine-tuning limits). Google Groups Standard Menu vs. Service Menu For less intrusive changes, use the standard background menu by long-pressing the
key for 2 seconds while the radio is on. This allows for user-level adjustments like: device.report Beep/Roger Beep : Toggle sounds and frequency groups. : Total of 36 levels available. Mode Setup : Selecting between FM, AM, USB, LSB, and PA. device.report Anytone 5555n Ii Service Menu - Google Groups
Short how-to story: Accessing the Anytone AT-5555N II Service Menu
Tom needed to tweak his Anytone AT-5555N II handheld for better performance on a local repeater. He wasn’t a radio tech, but he wanted a safe, reversible change — nothing that would void warranty or break the radio.
Preparation
Entering service menu (safe approach)
What Tom checked (and what he avoided)
Making a safe change
Testing and rollback
Final notes and best practices
If you want, I can:
4. Critical Adjustments Explained
A. Adjusting RF Power (PO)
B. Frequency Expansion (Unlocking) If the radio is restricted to the standard 11m band (CB):
C. Frequency Calibration (TCXO) If your radio is slightly off-frequency (people tell you you sound "bassy" or "muffled" on SSB):
Title: Operational Analysis and Technical Procedures: Accessing and Interpreting the Service Menu of the AnyTone AT-5555N II
Abstract
This paper provides a comprehensive technical guide to accessing, navigating, and interpreting the service (alignment) menu of the AnyTone AT-5555N II multi-band mobile transceiver. Often referred to as the "hidden menu," this interface is critical for technicians performing maintenance, frequency alignment, and power calibration. This document outlines the entry protocols, delineates the function of key menu parameters, and discusses the implications of misconfiguration. The paper aims to serve as a standardized reference for radio service professionals and advanced amateur radio operators seeking to restore the device to factory operational specifications. Key Parameters to Know (AT-5555N II) Note: Your