GB811249A - Transceiver for multi-channel radio communication systems - Google Patents

Transceiver for multi-channel radio communication systems

Info

Publication number
GB811249A
GB811249A GB398657A GB398657A GB811249A GB 811249 A GB811249 A GB 811249A GB 398657 A GB398657 A GB 398657A GB 398657 A GB398657 A GB 398657A GB 811249 A GB811249 A GB 811249A
Authority
GB
United Kingdom
Prior art keywords
tuning
crystal
circuits
straight edge
selector switches
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB398657A
Inventor
Paul Daniel Rockwell
James O Stephenson
David Daniel Babb
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bendix Aviation Corp
Original Assignee
Bendix Aviation Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bendix Aviation Corp filed Critical Bendix Aviation Corp
Priority to GB398657A priority Critical patent/GB811249A/en
Publication of GB811249A publication Critical patent/GB811249A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/18—Control by auxiliary power
    • H03J1/22—Control by auxiliary power with stepping arrangements actuated by control pulses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

811,249. Variable capacitors. BENDIX AVIATION CORPORATION. Feb. 5, 1957, No. 3986/57. Class 37. [Also in Group XL (c)] A radio transmitter receiver, employing remote control of crystal banks providing coarse and fine tuning, uses a motor-driven mechanical system to rotate both the crystal bank selector switches, and the coarse and fine tuning of the R.F. and I.F. circuits. Since the tuning of the R.F. circuits is mechanically linked to the rotating crystal selector switches, in order to achieve complete frequency coverage by equal rotational increments of the tuning capacitor, Fig. 5, vanes are provided giving 180 degree meshing. The arcuate sector through which the rotor plate extends is in excess of 180 degrees so that the short straight edge 155 is not a continuation of the long straight edge 156, and a corresponding cut-out is made in the stator plate 153. The I.F. tuning capacitor, Fig. 6, is shaped to provide a symmetrical tuning characteristic, the stator being mounted at the lower end of its long lobe 163 to minimize asymmetry of its capacitance curve. Specification 769,353, [Group XXXVIII], is referred to.
GB398657A 1957-02-05 1957-02-05 Transceiver for multi-channel radio communication systems Expired GB811249A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB398657A GB811249A (en) 1957-02-05 1957-02-05 Transceiver for multi-channel radio communication systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB398657A GB811249A (en) 1957-02-05 1957-02-05 Transceiver for multi-channel radio communication systems

Publications (1)

Publication Number Publication Date
GB811249A true GB811249A (en) 1959-04-02

Family

ID=9768641

Family Applications (1)

Application Number Title Priority Date Filing Date
GB398657A Expired GB811249A (en) 1957-02-05 1957-02-05 Transceiver for multi-channel radio communication systems

Country Status (1)

Country Link
GB (1) GB811249A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230406A (en) * 1989-02-09 1990-10-17 Toshiba Kk Telecommunication system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230406A (en) * 1989-02-09 1990-10-17 Toshiba Kk Telecommunication system
US5077731A (en) * 1989-02-09 1991-12-31 Kabushiki Kaisha Toshiba Telecommunication arrangement
GB2230406B (en) * 1989-02-09 1993-09-01 Toshiba Kk Telecommunication system

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