Within that brief two-second window, press the remaining front-panel buttons sequentially from left to right: RB , NB , SCAN , MEM , and EMG .
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.
Ensure that the SSB power adjustment settings in the service menu are not set too low.
: Sets the threshold for what the receiver interprets as an S9 signal.
: Many settings require an external RF power meter, a dummy load, a frequency counter, and an audio signal generator to adjust correctly. Do not guess the values. How to Access the AnyTone AT-5555N II Service Menu
Accessing this menu is not documented in the standard user manual, as these adjustments are intended for professional technicians in a lab setting with specialized test equipment.