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Frequency Stability/Accuracy with and without OCXO

Per default all SPECTRAN V6 use a TCXO with 280 ppb stability.

The optional OCXO offers you a 5 ppb stability instead.


Attached screenshots shows the frequency drift of the (default) TCXO time base over time using a high resolution 1Hz RBW measurement.

We can see the marked area within the waterfall view and the max hold within the spectrum view showing the drifting to be around 20Hz.

In comparison the optional OCXO time base would show no movement at all with this setup.

TCXO Time Base Frequency Drift over Time