After the Deadline is no longer actively maintained and the hosted service has been shut down. All of the source code is available for download if you wish to run your own AtD server.
On SSB, aggressive ALC can distort your audio. Lowering SSB-ALC slightly (e.g., from 30W down to 25W PEP) often results in a cleaner, punchier transmission with less splatter.
Once in the service menu, navigation is generally straightforward: anytone at-5555n ii service menu
The Service Menu isn’t a set of regular user options (like RF gain or mic gain). Instead, it’s a protected diagnostic area used at the factory to calibrate: On SSB, aggressive ALC can distort your audio
Accessing it voids the warranty if misused—but for experienced operators, it’s a precision instrument. The Service Menu isn’t a set of regular
If your AT-5555N II is heard "off frequency" on SSB (e.g., you sound low pitch or high pitch to other stations):