Controls BFO frequency, local oscillator offset, and fine-tuning limits.
He keyed the mic again. The needle swung hard. He used the down arrow on the keypad, nudging the digital potentiometer down. Click, click, click. He watched the meter, waiting for the sweet spot. He keyed again. The needle swung smoothly, settling comfortably into the 40-watt range. Perfect. anytone at5555n ii service menu work
: Use the Channel Selector knob to move through the numbered menu items. He used the down arrow on the keypad,
The service menu is a playground for casual users. Adjusting these settings without a frequency counter or signal generator can easily "brick" the radio's performance. He keyed again
Rotate the Channel Selector knob to scroll through the roughly 53 available menu items.
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💡 Most people only need it to slightly lower dead key power for an amplifier, or to fix slightly off-frequency SSB transmit. If the radio is working fine – don’t touch it. Seriously.