*google search*

https://en.wikipedia.org/wiki/Nomog.....m#Applications

nom·o·gram
ˈnäməˌɡram/
noun
noun: nomograph
a diagram representing the relations between three or more variable quantities by means of a number of scales, so arranged that the value of one variable can be found by a simple geometric construction, for example, by drawing a straight line intersecting the other scales at the appropriate values.

Accession Number : ADA158652

Title : Application of Nomographs for Analysis and Prediction of Receiver Spurious Response EMI

Descriptive Note : Technical memo.

Corporate Author : NAVAL AIR TEST CENTER PATUXENT RIVER MD

Personal Author(s) : Heather, Frederick W.

PDF Url : ADA158652

Report Date : 23 JUL 1985

Pagination or Media Count : 16

Abstract : Spurious response EMI for the front end of a superheerodyne receiver follows a simple mathematic formula; however, the application of the formula to predict test frequencies produces more data than can be evaluated. An analysis technique has been developed to graphically depict all receiver spurious responses usig a nomograph and to permit selection of optimum test frequencies. The discussion includes the math model used to simulate a superheterodyne receiver, the implementation of the model in the computer program, the approach to test frequency selection, interpretation of the nomographs, analysis and prediction of receiver spurious response EMI from the nomographs, and application of the nomographs. In addition, figures are provided of sample applications. This EMI analysis and prediction technique greatly improves the Electromagnetic Compatibility (EMC) test engineer's ability to visualize the scope of receiver spurious response EMI testing and optimize test frequency selection. Keywords include: EMI; Receiver spurious response; EMC; and Nomographs.

Descriptors : *ELECTROMAGNETIC COMPATIBILITY, *NOMOGRAPHS, *SUPERHETERODYNE RECEIVERS, COMPUTER PROGRAMS, MATHEMATICAL MODELS, FREQUENCY, OPTIMIZATION, PREDICTIONS, FORMULATIONS, RESPONSE, RECEIVERS, MATHEMATICS, ENGINEERS, SPURIOUS EFFECTS, FREQUENCY ALLOCATION.

Subject Categories : Numerical Mathematics
Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE

https://books.google.com/books ?id=16cpfTd0ovcC&pg=PA121&lpg=PA121&dq=nomograph+for+naval+applications&source=bl&ots=qiTePpgowb&sig=OkC50-DwnHwaXuhwgrYHIFW7uq8&hl=en&sa=X&ei=6PuGVaW6H8XvoATS2JvAAg&ved=0CGcQ6AEwDQ#v=onepage&q=nomograph%20for%20naval%20applications&f=false

Sounds good! :3