(d) Open switch S1 and measure the oscillator voltage (V2).
(e) Calculate the input terminal impedance (Zi) of the circuit.
Note that when the circuit is properly terminated in 600 ohms and the
impedances are matched, the oscillator output voltage should read 0.775 volt
RMS, equivalent to a power level of 0 dBm. This is a convenient method for
quickly verifying the presence of 600-ohm impedance. Impedance other than
600 ohms will produce different values of measured voltage.
(f) Input terminal impedance tolerance is 10 percent.
That is, 540
to 660 ohms.