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.
) signal into the antenna jack (e.g., -73 dBm for S9) and adjust these parameters until the digital meter displays exactly S1 or S9. 5. SWR Meter Calibration (SWR) anytone at-5555n ii service menu
) signal into the antenna jack to calibrate the software S-meter accurately. Critical Warnings and Best Practices If your radio reports an "S9" signal on
Entering the service menu and changing values incorrectly can: SWR Meter Calibration (SWR) ) signal into the
: Aligns the peak frequency deviation (typically factory-set to 2.5 kHz or 5.0 kHz depending on bandwidth rules). 3. S-Meter Calibration (RX)
The exact naming conventions in the service menu can vary slightly based on your radio's firmware revision, but they generally follow standard abbreviation formats for transceiver alignment. 1. Frequency Calibration (FRQ / REF)