"High power... P2," he mumbled, referencing the scrawled notes in his lap.
The Anytone AT-5555N II service menu is a powerful but risky tool. The radio is designed to perform very well straight out of the box, and most of the adjustments you'll need are readily available in the user-friendly standard menu. The service menu should be seen as a last resort for advanced troubleshooting or calibration, and it should only be used by those who understand the high risks involved.
The rain in Seattle didn't just fall; it assaulted the pavement, turning the city into a smear of gray neon. Inside the cab of his battered Peterbilt, Elias gripped the steering wheel, his knuckles white. The static from his radio was a relentless hiss, a wall of white noise between him and the outside world.
: Never transmit during service menu testing using an antenna. Use a 50-ohm dummy load to protect your finals and prevent illegal over-the-air interference. anytone at5555n ii service menu work
Rotate the main channel selector knob to scroll through the different alignment items.
The screen will flash and display an indicator like "FM" or a channel number paired with a menu value (typically showing up to 59 distinct settings). Navigation and Modification Rules
When accessing and modifying settings in the service menu, it's essential to exercise caution: "High power
Various "POW" settings allow for fine-tuning the RF output power for different modes (AM/FM/SSB). SWR Protection:
The flexibility within the service menu is its main draw. Here are some of the key adjustments users have discussed:
Next was the power calibration. He keyed the microphone, watching the meter on the radio jump. The needle slapped the red zone instantly—dangerous. If he transmitted like that, he’d blow his final transistor, leaving him truly silent. The radio is designed to perform very well
To access the service menu on the AnyTone AT5555N II, follow these steps:
Because AnyTone does not publicly distribute official documentation for this subsystem, radio enthusiasts on the Google Groups Technical Forums have reverse-engineered the alignment registers. The service menu relies heavily on adjusting the voltage across internal varicaps (variable capacitance diodes) to alter the reference oscillators. Service Code Intended Function Practical Application / bf BFO (Beat Frequency Oscillator) Adjustment Centers the