Can you provide more detail on the compensation routine above what is provided in the user manual? My main interest in the improve the accuracy of the horizontal timing.
When the Sampling scopes sweeps across the screen it does so with a count of an oscillator plus a ramp. When the ramp runs out of range the scope adds to the count of the oscillator, and starts the ramp at a low position. This change (long ramp, smaller count to larger count, short ramp) is calibrated for smoothness when compensation is performed.
If a PhaseRef (82A04) is used the above becomes insignificant (because the PR supplies the precise timing position).
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