Data, Filters and Sine Waves
Green = Boolean data
Thick lines = controls
Thin line = indicators
Orange= decimal numbers
Blue =integers
Wire thickness = dimension of data
Thin=scalar
Med=vector
Thick 2 or 3D array
Pink=cluster data can hold anything
and
Sine Waves
A11 = A10 x 10 x X11
11
Sine wave equation
Sin (wT +Ǿ)
Sin (2∏ fT+ Ǿ)
F= frequency in HZ
T =time in sec
Ǿ = radians/sec
Time =iT
i is the number of loops
T is 1/fs
Amplitude
A x sin (2∏ fiT+ Ǿ)
Where i= 0,1,2,3Â…. N-1
Which is the number of samples
Digital filters
h (system impulse response)
___ÂX_____ filter ______Y_____
Time y[n]=x[n] * h[h]
Frequency r(f)=X(f)H(f)
Band pass filter let only the frequencies between pass
Band stop let only the frequencies above and below pass
High pass lets everything above pass
Low pass lets everything below pass
High cut off frequencies are only used with band pass and band stop
High and low cut off frequencies are used with low cut off frequencies
Order refers to the polynomials in the equation of the filter
A higher order is cleaner but slower
Charts have memory and are for real time display
Graphs are for off line display
Charts use bundle input