Programming instructions

Source Components
Multisim Component Reference Guide 1-6 ni.com
1.9.1 Characteristic Equation
The behavior of the AM source is described by:
where:
vc = carrier amplitude, in volts
fc = carrier frequency, in hertz
m = modulation index
fm = modulation frequency, in hertz
1.10 FM Source
The FM source (single-frequency frequency modulation source) generates a frequency-
modulated wave. It can be used to build and analyze communications circuits.The signal
output can be either a current source or a voltage source.
1.10.1 FM Voltage Source
This is an FM source of which the output is measured in voltage.
1.10.2 Characteristic Equation
The behavior of the FM voltage source is described by:
where:
va = peak amplitude, in volts
fc = carrier frequency, in Hz
m = modulation index
fm = modulation frequency, in Hz
()( )
()
Vvc fcTIME m fmTIME
OUT
= ∗ ∗∗ ∗ ∗ + ∗ ∗∗ ∗sin sin212 ππ
()
()
Vva fcTIMEm fmTIME
OUT
=∗ ∗∗∗ +∗ ∗∗∗sin sin22 ππ
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