Anytone At-5555n Ii Service Menu

Adjusting power output levels or modulation depth beyond factory specifications can cause the final power transistors to overheat and fail.

: A common use for this menu is to address high "noise floor" readings (where the S-meter shows S5–S7 with no signal). Changing CH-52 (RFG) from its default (often ~86) to a higher value like has been reported to resolve this. Adjustment Method : To change a value, press and hold the PTT button while rotating the Factory Reset

There is no "reset" for this specific menu; changes are permanent unless manually reversed. anytone at-5555n ii service menu

: Controls the local oscillator offset. Adjust this first if the radio is off-frequency on USB or LSB.

: Used for fine-tuning frequency steps (voltages across varicaps) for specific frequency offsets (.00, .04, .05, .09). Adjusting power output levels or modulation depth beyond

The service menu provides access to various configuration options, including:

I’ve used the service menu on my AT-5555N II to gently bring my AM carrier down to 4W (for driving an amp) and to calibrate the frequency drift after warm-up. It’s a powerful tool, but treat it like surgery—make small changes, test, and always document your original settings. Adjustment Method : To change a value, press

The service menu is a hidden diagnostic and alignment interface used for fine-tuning the radio's hardware parameters, such as frequency offsets and modulation levels. How to Access the Service Menu