Rotate the Channel Selector knob to change the numerical value of the selected setting.
To enter the hidden service menu, use the following button combination: Turn the radio completely .
knob to scroll through hidden alignment settings like Power (PWR), Squelch (SQ), and Modulation (MOD) levels. anytone at-5555n ii service menu
: Micro-adjusts the reference oscillator so the radio transmits and receives exactly on-frequency. Safe Practices for Tuning Your Radio
The display will show a code or a specific sub-menu label (often starting with "CLE" or displaying raw hexadecimal alignment values) indicating you have successfully bypassed the consumer interface. Rotate the Channel Selector knob to change the
Often used to reduce high background noise (S5-S7) present on some units. Frequency Alignment
Usually adjusted using an RF signal generator injecting a precise standard signal (e.g., -73dBm for an S9 reading) so your meter accurately reflects incoming signal strength. : Micro-adjusts the reference oscillator so the radio
If your radio reports an "S9" signal on an empty channel, or fails to register strong incoming signals, the receiver calibration parameters can fix it.