Sets the dead-key carrier level (usually set to a fraction of PEP to allow headroom for modulation).
Press the [FUNC] button to move to the next alignment parameter.
Entering the service menu requires a specific sequence of button presses during the radio's power-on cycle. Ensure the radio is completely turned off. anytone at-5555n ii service menu
Modifying settings in the service menu directly alters the radio's firmware calibration values.
For most users, the stock settings work fine. But for the tinkerer, the technician, or the power user chasing every last dB of performance, the Service Menu is a gateway to fine-tuning the radio’s soul. Sets the dead-key carrier level (usually set to
If your radio is slightly off-frequency, especially on SSB (USB/LSB), this is where you fix it.
An accurate, calibrated meter (like a Bird 43 or a high-quality Daiwa/Dosy meter) to verify true RMS and PEP power output. Ensure the radio is completely turned off
: Controls the frequency offset. Adjust this first if the radio is off-frequency across all modes. Critical Safety Rules
: Your AM modulation or FM deviation is set too high. Back the values down toward the factory defaults.
You must write down every original value before changing it.
A: Almost certainly, yes. Any evidence of tampering with factory settings would be a valid reason for a manufacturer to void a warranty.