It is incredibly tempting to use this menu to "supertune" or crank the AT-5555N II past its factory ratings. Forcing the radio to push out excess wattage will overheat the finals, saturate the transformers, distort your audio, and cause premature component failure. 3. S-Meter Calibration (Receive & Transmit)
If a radio appears to be off-frequency or the power output is inconsistent, it should be checked using professional tools, including:
If your radio is reporting a "Signal 9" for a weak station, or if local noise is registering artificially high, your S-meter needs adjustment. anytone at-5555n ii service menu
Many operational features can be customized safely using the official PC software and a USB programming cable.
Ensure your SWR (Standing Wave Ratio) is as low as possible to protect the final transistors. It is incredibly tempting to use this menu
There are several reasons why you might want to access the service menu on your Anytone AT-5555N II:
The service menu breaks down power calibration by mode. You will typically find separate parameters for: Sets the dead-carrier wattage for FM. S-Meter Calibration (Receive & Transmit) If a radio
What are the hidden menu settings on the AnyTone AT5555N 2 radio?
This adjustment is considered a "workaround," not a fix, and many users report that the default RF Gain is simply "a bit too hot" from the factory.
A common complaint with some AT-5555N II units is an elevated noise floor (e.g., an S5-S7 reading with no antenna connected). A popular workaround is to adjust the service menu:
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