Changing certain parameters without proper test equipment can ruin your radio's calibration permanently. For instance, adjusting PLL-REF without a frequency counter to verify the output can shift your radio off frequency, making it unusable for SSB communication. If you do not have a frequency counter, oscilloscope, or RF wattmeter with a dummy load, parameters like PLL-REF, ALC, FM DEV, or any of the HI/LO power settings . These adjustments require precise measurement to be done safely and correctly.
Once you have adjusted a setting to its correct value using your test equipment, press and hold the FUNC button or press the PUSH knob again to lock it in.
Many users aim to improve the AM modulation swing or tune the receive quality. anytone at5555n ii service menu updated
Used to adjust AM modulation swing. Some users report that setting these to zero improves "swing".
Once inside the hidden menu, use the physical front panel controls to navigate and save your adjustments: These adjustments require precise measurement to be done
Use the Channel Selector knob to move through numbered menu items.
"My SSB audio sounds distorted on the air." Solution: The updated firmware adds ALC clamping. Go to P-05 (SSB ALC). Reduce from 95 to 85. This cleans up sideband audio significantly. Used to adjust AM modulation swing
"My AM carrier is too high (10 watts), but the radio is set to low power." Solution: Go to P-07 (High Power Scale). Reduce the value from 120 to 85. This digitally reduces the drive voltage to the RD16HHF1 finals. Do not exceed 120.
The method for entering the service menu has remained consistent across recent firmware updates, requiring a specific sequence during power-up. the radio.
Accessing the service menu of the AnyTone AT-5555N II allows for fine-tuning of frequency alignment and carrier settings that are not available in the standard user menu. How to Access the Service Menu