CommEngTool

Message Signal Generation

Sinusoid

Audio

Fourier

Simulation Time (sec)

Amplitude (V)

Frequency (Hz)

Phase (deg)

Message Signal Plot

Time Domain

Magnitude Spectrum

Phase Spectrum

Filtered Message Signal

Select filter

Cut-off frequency (Hz)

Lower cut-off frequency (Hz)

Upper cut-off frequency (Hz)

Filtered Message Signal Plot

Time Domain

Magnitude Spectrum

Phase Spectrum

Amplitude Modulation

Unfiltered Message

Filtered Message

Select amplitude modulation

Carrier Amplitude (V):

Carrier Frequency (Hz):

Scaling Factor k:

Amplitude Modulation Plot

Time Domain

Magnitude Spectrum

Phase Spectrum

Amplitude Demodulation

Select amplitude demodulation

Envelope Detector R (Ohms):

Envelope Detector C (Farads):

Sync Detector phase offset (deg):

Sync Detector freq offset (Hz):

Amplitude Demodulation Plot

Time Domain

Magnitude Spectrum

Phase Spectrum

Frequency Modulation

Unfiltered Message

Filtered Message

Carrier Amplitude (V):

Carrier Frequency (Hz):

Freq Deviation Constant (Hz/V):

Theoretical Spectrum

In this section you can view the theoretical spectrum and complex domain plot of a message signal. Note: You will have to generate a new message signal. You can create a new message signal by combining a maximum of 2 sinusoids.

Frequency Modulation Plot

f_i(t)

2πk_f∫v_m(t)

∠FM

Magnitude Spectrum

Phase Spectrum

Frequency Demodulation

Select Slope Detector Output

Envelope Detector R (Ohms):

Envelope Detector C (Farads):

Frequency Demodulation Plot

Time Domain

Magnitude Spectrum

Phase Spectrum

Noise Generation

Unfiltered Message

Filtered Message

μ:

σ²:

Constant:

Scalar Factor:

Verification Section

In this section you calculate the overall mean and variance. Then observe the plot to see if how closely your values matched.

(Overall) μ:

(Overall) σ²:

Noise Plot

Time Domain

Histogram

PSD

Signal with Noise Plot

Time Domain

Histogram

PSD