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Spooky2 Scalar Digitizer Q&A: How do we know if the Generator is correctly connected or functioning?
If you have concerns about whether the modulation is working, you can select a slow frequency in the Spooky2 database and run that. The coil tester will flash when placed on the coil.

I have the scalar unit, how can I get the coil tester?
Hi, Frank! You can contact service lady, and we will add a coil tester in your next package.