Hioki 3554, Инструкция по эксплуатации

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10.5 Synchronous Detection System
152
Given "v1," a reference signal voltage for the AC current gener-
ated in the instrument, and "v2," the signal voltage for use in
synchronous detection, these parameters may be expressed by
the equation given below.
θ
of v2 shows the phase difference
against v1 and is generated by the reactance.
v1 = Asin
ω
t
v2 = Bsin (
ω
t +
θ
)
When synchronous detection is applied to both v1 and v2, they
are expressed as follows:
v1 X v2 = 1/2ABcos
θ
- 1/2ABcos (2
ω
t +
θ
)
The first term indicates effective resistance. The second term is
attenuated by the LPF. The instrument displays the first term.