The Anytone AT-5555N II service menu is a powerful tool for advanced users to perform internal alignments and "fine-tune" the radio's performance without opening the case. Reviewers generally find it highly effective for correcting frequency drift and transmitter/receiver alignment, though they warn that settings vary by individual unit. How to Access the Service Menu
To enter the hidden service menu, follow this specific key sequence: Turn the radio OFF. Press and hold the FUNC button while turning the radio ON.
Quickly press the following buttons in order: RB → NB → DW. Service Menu Options & Functions
Users have identified several key alignment settings within this menu that are not documented in the standard AnyTone Instruction Manual:
bfC: Adjusts the 10.24MHz BFO (Beat Frequency Oscillator) frequency. This is crucial for fixing unstable SSB receive quality.
loC: Controls the Local Oscillator offset. Reviewers recommend adjusting this first to get as close to the target frequency as possible before fine-tuning with the BFO.
fr0, fr4, fr5, fr9: These correspond to limit voltages for fine-tuning at specific steps (e.g., .00, .04, .05, .09). Adjusting these ensures the clarifier movement is smooth and continuous.
Modulation & Power: Some versions allow for adjusting "dead key" and swing settings to improve AM performance, which some users find weak out of the box. Performance Reviews
Alignment Accuracy: Expert reviewers on Google Groups note that using these settings can resolve issues where the radio receives slightly off-frequency (e.g., 1kHz off on CW or several hundred Hz on SSB).
Reliability: Compared to the older AT-6666, the AT-5555N II is praised for its "rock solid" SSB performance and superior noise filtering once properly aligned.
Cautionary Note: Each radio comes from the factory with unique software-defined values. Reviewers at Simonthewizard strongly advise recording your original default values before making any changes, as there is no "undo" for specific menu adjustments. Anytone 5555n Ii Service Menu - Google Groups
Unlocking the AnyTone AT5555N II Service Menu: A Comprehensive Guide
The AnyTone AT5555N II is a popular ham radio transceiver known for its robust features and reliable performance. While it's a great device out of the box, some users may want to explore advanced settings and customization options. That's where the service menu comes in. In this write-up, we'll cover the process of accessing and navigating the AnyTone AT5555N II service menu, as well as some of the key settings and adjustments you can make.
What is the Service Menu?
The service menu, also known as the "alignment" or "calibration" menu, is a hidden menu on the AnyTone AT5555N II that allows users to access advanced settings and perform calibration procedures. This menu is intended for use by authorized service technicians and advanced users who are familiar with the technical aspects of the radio.
Accessing the Service Menu
To access the service menu on the AnyTone AT5555N II, follow these steps:
Navigating the Service Menu
Once you've accessed the service menu, you'll see a list of options. Use the following buttons to navigate:
Key Settings and Adjustments
Here are some of the key settings and adjustments you can make in the service menu:
Important Safety Considerations
When making adjustments in the service menu, exercise caution to avoid causing damage to the radio or affecting its performance. Keep in mind:
Conclusion
The AnyTone AT5555N II service menu offers advanced users and technicians a range of settings and adjustments to customize and optimize the radio's performance. However, access to these settings requires caution and technical expertise. If you're not experienced with working with radio transceivers, it's recommended to avoid making adjustments in the service menu to prevent potential damage or performance issues. Always consult the user manual and technical documentation before attempting any adjustments.
The AnyTone AT-5555N II service menu is a professional calibration tool, not a toy. For the average owner, there is no work to be done inside it. Your radio left the factory aligned to tighter tolerances than you can achieve without a bench of test gear.
If you are seeking more features (like expanded receive or 10m/12m transmit), use the PC programming software. If you are experiencing drift or low power, the issue is likely a hardware fault (bad MOSFET, cracked crystal) or a simple menu setting in the standard menu (like RF power knob or Mic gain). Only enter the service menu if you understand phase-locked loops, have a frequency counter, and accept that one wrong turn of the knob will turn your AnyTone into a very fancy paperweight. In the world of radio alignment, sometimes the best work is the work you choose not to do.
AnyTone AT-5555N II service menu is an undocumented feature primarily used for fine-tuning frequency alignment and modulation. While users report it is effective for resolving specific issues like "S7 noise" on the S-meter, it is generally considered complex and carries a risk of misaligning the radio if not done carefully. Google Groups Service Menu Performance & User Feedback Audio Modulation Improvements
: Users have successfully used the service menu (specifically the
setting) to increase modulation levels from the factory default of 31 up to 63 for "full audio". Addressing S-Meter Noise
: A common complaint for newer units is a high base noise floor (S5-S7) even with no signal. Adjusting the anytone at5555n ii service menu work
(RF Gain) setting in the service menu (typically around value 105) has been noted as a working fix by some operators. Precision Alignment
: The menu allows for individual alignment of the local oscillator ( ) and beat frequency (
) for different modes (FM, USB, LSB). Experienced users recommend adjusting first to get as close as possible before tweaking for final steps to preserve other mode settings. Google Groups How to Access the Service Menu
Accessing this menu requires a specific sequence that is not found in the standard manual. Preparation
: Turn the radio off. Ensure all switches are in the upper position except for NB/ANL, which should be set to Activation : Press and hold both the buttons simultaneously while turning the radio on.
: Release the buttons and quickly press the following keys in order: RB, NB, SCAN, MEM, EMG Navigation Channel Selector to scroll through menu items (e.g., CH-52 for RFG). Key the to view the stored value and hold while rotating the VFO to change it. Service Menu vs. Standard Background Menu For most common adjustments, the standard Background Function Menu is safer and more accessible. Bob's CB Radio : Long press [MENU] for 2 seconds. Common Settings : Configure (levels 1-36), SWR Protection SSB Clarifier Bob's CB Radio
There is no official documentation for service menu settings. It is highly recommended to record original values
before making any changes, as a factory reset may not restore these specific internal alignments.
of known setting codes for frequency alignment or instructions for the PC programming software Anytone 5555n Ii Service Menu - Google Groups 24 Jul 2024 —
Unlocking the Power of Anytone AT5555N II: A Guide to Service Menu and Its Functions
The Anytone AT5555N II is a popular and versatile two-way radio that has gained a reputation for its reliability and advanced features. However, to truly unlock its potential, users need to access the service menu, a hidden section that allows for fine-tuning and customization of the device. In this blog post, we'll explore the world of Anytone AT5555N II service menu and its various functions.
What is the Service Menu?
The service menu, also known as the engineering menu, is a special menu that allows authorized users to access and modify advanced settings and configurations on the Anytone AT5555N II. This menu is not accessible through the standard user interface and requires a specific sequence of buttons to be pressed.
Why Access the Service Menu?
Accessing the service menu on your Anytone AT5555N II can be beneficial in several ways: The Anytone AT-5555N II service menu is a
How to Access the Service Menu
To access the service menu on your Anytone AT5555N II, follow these steps:
Navigating the Service Menu
Once you've accessed the service menu, you'll see a list of options. Here are some of the key functions you can expect to find:
Common Service Menu Functions
Here are some common functions you'll find in the service menu:
Important Safety Precautions
When accessing and modifying settings in the service menu, it's essential to exercise caution:
Conclusion
The Anytone AT5555N II service menu offers a wealth of options for customization, troubleshooting, and upgrades. By understanding how to access and navigate this menu, you'll be able to unlock the full potential of your two-way radio. Always exercise caution when making changes, and consult the user manual or manufacturer's support if you're unsure.
Additional Resources
For more information on the Anytone AT5555N II and its service menu, we recommend the following resources:
Share Your Experience
Have you accessed the service menu on your Anytone AT5555N II? Share your experiences, tips, and questions in the comments below!
The AnyTone AT-5555N II is a modern classic in the world of amateur radio and high-performance CB (11m) operation. It boasts a dual-core microprocessor, a full-color display, and impressive frequency stability. However, beneath its user-friendly interface lies a hidden, powerful, and potentially dangerous tool: the Service Menu. For the experienced technician, this menu is a gateway to recalibration and optimization. For the unwary, it is a path to rendering a $250 radio un-transmittable. Power off the radio