: [RB] , then [NB] , then [SCAN] , then [MEM] , then [EMG] . (Note: Some older board revisions require pressing [DW] right after [NB]).
If local operators report that your audio is too quiet or heavily distorted, the service menu allows you to adjust the internal microphone amplification stages. Increasing the AM modulation depth or FM deviation too high will cause "splatter" across adjacent channels, while setting it too low makes your signal unreadable. 3. S-Meter Calibration
Altering service values carries inherent risks. Modifying parameters without proper tools can lead to severe operational issues. anytone at5555n ii service menu work
You can tweak how wide the signal swings in FM mode. Turning this up slightly can help you punch through heavy QRM (interference), but pushing it too high will cause over-modulation and splatter onto adjacent frequencies.
He scrolled through the menu until he found P0 , P1 , P2 —the power adjustment pots in digital form. : [RB] , then [NB] , then [SCAN] , then [MEM] , then [EMG]
: Immediately release the first two buttons and quickly press the remaining buttons on the top row in order, moving from DW toward EMG .
A non-inductive 50-Ohm dummy load rated for at least 100 Watts. Never transmit calibration tones into an antenna. Increasing the AM modulation depth or FM deviation
To view or modify a setting, on the microphone.
The first issue was the frequency offset. The display read FS 0.002 . That was the culprit. Someone had shifted the reference frequency, knocking his transmission off-channel. He tapped the channel selector knob, the plastic clicking loudly in the quiet cab. He dialed it back to 0.000 .
: Power the radio OFF and ON again to save your changes and return to normal operation. Key Service Menu Settings