A: Almost certainly, yes. Any evidence of tampering with factory settings would be a valid reason for a manufacturer to void a warranty.
If done correctly, the radio will enter Service Mode, giving you access to the hidden parameters. anytone at-5555n ii service menu
Technician Tip: While it is tempting to max these values out, pushing the final transistors past their rated limits will cause thermal runaway, heavy harmonic splatter, and premature hardware failure. Keep adjustments within a conservative margin. 3. Modulation and Deviation (MOD / DEV) A: Almost certainly, yes
Use the loC setting to get the frequency as close as possible to the target frequency. Technician Tip: While it is tempting to max
Over time, the internal reference crystal oscillator can drift due to age and temperature cycles. This setting allows you to shift the master clock.
Unlike older analog CB and amateur radios that required a technician to turn physical adjustment pots (potentiometers) inside the chassis using non-metallic screwdrivers, modern radios like the AT-5555N II utilize digital potentiometers.
Rotate the Channel Selector knob to change the numerical value of the selected setting.