Quote:
Originally Posted by Timbucus
Nothing is dumb - just do it once or if you change from x1 to x10 settings as it calibrates the probes. You would also need to do it again if you bought new probes - also try to use the same probes on each port as the trim will be different for each port. This means you match a probe to a port
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Thanks. When I have been measuring frequencies with the scope, the first graph I put into the doc is what you have suggested - a squared off measurement before I start measuring the PET.