Frequency the ADF radio is tuned to. Measured in kHz. Read-write.
The valid range of values is 200 to 1699.9 in increments of 0.1. However, if the 100 Hz ADF Frequency Adjustability preference is not selected, only values from 200 to 999 in increments of 1 are actually valid.
Example
ADF_FREQ = 362