[Elecraft] Power measurement with a 'scope
[email protected]
[email protected]
Fri Feb 15 20:21:12 2002
In a message dated 2/15/2002 6:54:40 PM Central Standard Time,
[email protected] writes:
I have a 100 MHz 'scope (Tektronix 465, Ebay, about $60). How is QRPp
measured using a scope and a dummy load
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Hi
A scope measures peak to peak voltage to convert to watts. First measure the
peak to peak voltage at the dummy load. Convert to peak by dividing by 2 then
convert to rms volts by dividing by 1.414. Then convert to watts by squaring
the rms voltage and dividing by 50 ohms
Don Brown
KD5NDB