AN/GRA-39 Radio Set Control Group Modification. Addition of Two Capacitors and a Choke to Microphone Input Circuits Enables AN/GRA-39 to be Used with New MC hf Radio Systems.

Abstract

Laboratory tests verify the reported susceptibility of the AN/GRA-39 to powerful hf fields. Instability results from detection of the envelope of an AM signal by the remote unit microphone amplifier input circuit. The modification reduces the rf vulnerability of the remote unit by 40-60 dB over the 2-30 MHz band. The modified AN/GRA-39 is shown to be operationally compatible with the TSEC/KY-65 narrowband secure voice unit.

Document Details

Document Type
Technical Report
Publication Date
Aug 12, 1976
Accession Number
ADA031763

Entities

People

  • R. J. Hessling

Organizations

  • Naval Information Warfare Systems Command

Tags

DTIC Thesaurus Topics

  • Amplifiers
  • Capacitors
  • Communication Equipment
  • Detection
  • Instability
  • Laboratory Procedures
  • Laboratory Tests
  • Microphones
  • Narrowband
  • Radio Equipment
  • Vulnerability

Fields of Study

  • Physics

Readers

  • Electronics Engineering
  • Sensor Fusion and Tracking Systems.
  • Speech Processing/Speech Recognition.