24-08-2012, 01:23 PM
As far as I can see the only way to get a really accurate measurement of the power meters input impedance is by using the bridge method ie: R (at balance) = R in.
For using the other method I would use a suitably callibrated scope to measure the peak volts in and work out the RMS from that and use that as the basis for any calculation.
Lawrence.
For using the other method I would use a suitably callibrated scope to measure the peak volts in and work out the RMS from that and use that as the basis for any calculation.
Lawrence.
