An intermodulation interference source locator (IMISL)

Author

Madni, A.M. ; McDonald, P.T. ; Vuong, J.B.

Author_Institution

Systron Donner Corp., Sylmar, CA, USA

fYear

1992

fDate

2-7 Feb. 1992

Firstpage

29

Lastpage

44

Abstract

The design of an intermodulation interference source locator (IMISL) test set that was developed for shipboard use in detecting and locating the sources of intermodulation interference in the frequency range of 20-30 MHz is described. The IMISL uses a dual-conversion superheterodyne receiver with a coherent detector to achieve high instantaneous dynamic range with low spurious signals. The fundamental principles of operation, specifications, and basic RF design approach are presented. The discussion covers how the test set was designed to locate shipboard sources of intermodulation (IM) interference in the presence of high-power transmit signals in the frequency range of 2 MHz-15 MHz. Figures are presented showing electrical and mechanical design approaches, including a single-man-portable transit case containing the test set and all its accessories.<>

Keywords

intermodulation measurement; radiofrequency interference; ships; superheterodyne receivers; test equipment; 2 to 15 MHz; HF; RF design; coherent detector; dual-conversion superheterodyne receiver; electrical design; intermodulation interference source locator; mechanical design; shipboard use; test set; Assembly; Attenuators; Band pass filters; Batteries; Detectors; Dynamic range; Frequency; Interference; Liquid crystal displays; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Aerospace Applications Conference, 1992. Digest., 1992 IEEE

Conference_Location

Snowmass, CO, USA

Print_ISBN

0-7803-0225-7

Type

conf

DOI

10.1109/AERO.1992.200373

Filename

200373