FCC GRANTS PETITION ON TONE MODULATION

The Federal Communications Commission granted an AAR petition to permit tone modulation on a secondary basis to voice operations on railroad frequencies in the 160 MHz band and on certain 450 MHz band frequencies for remote control of locomotives and cab indicators. The FCC also agreed to permit use of two pairs of frequencies in the 450-460 MHz band, now reserved for slave locomotive control, for the additional functions requested. The FCC amended frequency tolerance rules to permit use of mobile transmitting equipment as base stations on two frequency pairs in railroad yards and terminals. The FCC denied the request to permit use of two splinter frequencies of 157.450 and 159.480 MHz for control of slave locomotives.

• Corporate Authors:

  Simmons-Boardman Publishing Corporation

  P.O. Box 350
  Bristol, CT  United States  06010
• Publication Date: 1972-7

Media Info

• Features: Tables;
• Pagination: p. 11-12
• Serial:
  • Railway System Controls
  • Volume: 3
  • Issue Number: 7
  • Publisher: Business Press International Limited

Subject/Index Terms

• TRT Terms: Locomotives; Radio; Railroad trains; Remote control; Slave locomotives
• Identifier Terms: U.S. Federal Communications Commission
• Old TRIS Terms: Remote control locomotives; Slave locomotive control; Tone modulation; Train radio
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00040995
• Record Type: Publication
• Source Agency: Railway System Controls
• Files: TRIS
• Created Date: Mar 9 1976 12:00AM