# Category : Science and Education

Archive : SA87.ZIP

Filename : SA.MSG

Bartlett

Bartlett[n]*x[n] Í> y[n]

Hamming

Hamming[n]*x[n] Í> y[n]

bLackman

Blackman[n]*x[n] Í> y[n]

haNning

Hanning[n]*x[n] Í> y[n]

Quit

Return to operations menu

6

Magnitude

³x[n]³ Í> y[n]

Square

³x[n]³ý Í> y[n]

Phase

Arctan(x.im/x.re) Í> y[n] (radians)

Conjugate

x[n]* Í> y[n]

Real

Re{x[n]} Í> y[n]

Imaginary

Im{x[n]} Í> y[n]

Quit

Return to operations menu

7

Generate

Generate a new sequence from equations

cXx

Autocorrelation

cxY

Cross correlation

Convolve

Convolution of two sequences

Integrate

x[n] Í> y[n]

Filter

Moving Average

Summary

æ å Max Min

Quit

Return to main menu

4

Fft

Fast Fourier transform

Dft

Discrete Fourier transform

Idft

Inverse discrete Fourier transform

iffT

Inverse fast Fourier transform

Quit

Return to analysis

4

Periodigram

1/N*³DFT{x[n]}³ý Í> y[n] power spectrum estimate

Bartlett

Bartlett power spectrum estimate

Welch

Welch power spectrum estimate

Db

dB{x[n]} Í> y[n]

Quit

Return to main menu

6

Retrieve

Load a file into a sequence

Save

Save a sequence in a file

Import

Import a foreign file type

Erase

Erase a file

Directory

Display directory of data files

Purge

Delete a sequence from memory

Quit

Return to main menu

4

Window

Bartlett Hamming Blackman Hanning

Unary

One sequence operations, Mag Magý Phase Conjugate Real Imaginary

Binary

Two sequence operations, + - * ú

Constant

One sequence and a constant operations, + - *

Quit

Return to operations menu

6

Data

Retrieve Save Import Erase Delete Directory

Operations

Window Uniary Binary Constant

Frequency

FFT DFT IFFT IDFT

Power

Periodigram Bartlett Welch dB

Time

Generate Cxx Cxy Convolve Integrate Filter Summary

Graph

Graph sample sequences

Quit

Exit to DOS

4

Add

Add two sequences, x[n] + y[n] Í> z[n]

Subtract

Subtract one sequence from another, x[n] - y[n] Í> z[n]

Multiply

Multiply two sequences, x[n] ú y[n] Í> z[n]

Dot

Dot two sequences

Quit

Return to Binary menu

3

Add

Add a constant to a sequence, x[n] + K Í> y[n]

Subtract

Subtract a constant from a sequence, x[n] - K Í> y[n]

Multiply

Multiply a sequence by a constant, Kúx[n] Í> y[n]

Quit

Return to operations menu

Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/