In a frequency measurement setup, what level of frequency variation is shown on repeated measurements?

In a frequency measurement setup, when both components use the same reference, this often results in zero frequency variation between repeated measurements. This is because using a common reference point minimizes discrepancies that might be introduced by individual instrumental noise or variances in calibration. As a result, repeated measurements should yield identical outcomes, demonstrating that the frequency being measured is stable and consistent relative to that reference.

The premise here relies on the stability and reliability of the reference being used. If both components are aligned with the same reference, then they should effectively cancel out any differences, resulting in a measurement that reliably indicates no frequency variation. This is crucial in calibration processes where measurements must be precise and reproducible.