“Spike Detection Range”
Defines a period of time in which sudden changes in the automated parameter are considered to be unwanted spikes. The spikes can be removed using the “Delete Automation Spikes function”. You can set values from 0 to 200 ms.
Where is “Delete Automation Spikes function”. It’s referred to again in Cubase 9 but nowhere to be found. No Key Coms either.
The OP is looking for the “Delete Automation Spikes function”. I’m guessing this is done automatically if the Spike Detection Range is set, and not an action in itself. The manual isn’t so clear there.
I think this is a case where the documentation is overly brief on the subject. There should a screen-shot in the Operations Manual showing which button they mean and what the screen is.
I’ve never had any problems with spikes using the default settings. It’s sometimes useful to have the waveform display on the automation track, but mostly I keep it turned off for a cleaner look.