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World of Ham Radio 1997
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1997-02-01
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CHEBY - Version 1.1B
These programs are helpful in designing lowpass, highpass and bandpass filters
based on Chebyscheff polynomials. Use CHEBY87.COM for machines having an
8087 numeric co-processor installed, and CHEBYBCD.COM on machines without
an 8087.
The basic functions are as follows:
o Frequency - enter a new center/cutoff frequency in hertz
o Bandwidth - enter a new bandwidth in hertz (bandpass filters only)
o Number Poles - enter new number of lowpass poles (1-9)
o Ripple - enter passband ripple factor in decibels
o Impedance - enter new input/output impedance in ohms
o Help - display this menu
o Print - print out filter characteristics to standard line printer
o Save - save filter parameters to a disk file
o Recall - load filter parameters from a disk file
o Consulting - read the Soln Laboratories advertisement
o Quit - return to DOS
This useful utility is provided to you free of charge by the engineering
staff at Soln Laboratories, Inc. Please feel free to make copies for your
friends and co-workers. To become a registered user and receive the most
recent copy of CHEBY, please send $10.00 to Soln Laboratories, Inc.
732A Holcolmb Bridge Road, Norcross, Georgia 30071.
Soln Laboratories is a high technology research and development company
engaged in providing professional services to industry and government.
We are experienced in RF/microwave circuit design, microprocessor based
systems, radar, communication systems, and professional audio. From
circuit design to theoretical analysis, no job is too large or too small.