This read-write object fine-tunes the internal reference oscillator, ranging from -999 to +999 in KHz units. This is a calibration knob for correcting small, persistent frequency offsets in the unit's own internal 10 MHz reference -- since cdd564RxFreqOffset reports the demodulator's measured carrier offset, a consistent nonzero offset seen there across many carriers, rather than one flaky link, would point to needing an internal reference adjustment here. If the measured frequency offset consistently reads a positive value across multiple different satellite carriers, an admin would apply a small negative adjustment via this object to correct the unit's own reference drift rather than chasing a phantom per-carrier issue.