GB1278957A - Apparatus for sensing the frequency to which a wave signal receiver is tuned - Google Patents

Apparatus for sensing the frequency to which a wave signal receiver is tuned

Info

Publication number
GB1278957A
GB1278957A GB4413969A GB4413969A GB1278957A GB 1278957 A GB1278957 A GB 1278957A GB 4413969 A GB4413969 A GB 4413969A GB 4413969 A GB4413969 A GB 4413969A GB 1278957 A GB1278957 A GB 1278957A
Authority
GB
United Kingdom
Prior art keywords
signal
tuner
frequency
staircase
tuned
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
GB4413969A
Inventor
Peter Eric Smith
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.)
AUDITS OF GREAT BRITAIN Ltd
Original Assignee
AUDITS OF GREAT BRITAIN Ltd
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 AUDITS OF GREAT BRITAIN Ltd filed Critical AUDITS OF GREAT BRITAIN Ltd
Priority to GB4413969A priority Critical patent/GB1278957A/en
Publication of GB1278957A publication Critical patent/GB1278957A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
    • H04H60/41—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas
    • H04H60/43—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas for identifying broadcast channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

1278957 Tuning monitors AUDITS OF GREAT BRITAIN Ltd 4 Dec 1970 [5 Sept 1969] 44139/69 Heading H3Q A tuning monitor apparatus for a receiver comprises a tuner 5 receiving a signal derived from the local oscillator 2 and tunable over a range of frequencies stepwise by an applied stepped electrical signal, e.g. a staircase signal from scan generator 8 controlled by a lowfrequency oscillator 10, and a sensing arrangement for indicating which step corresponds to the received tuned frequency. In operation, the tuner may be driven by a stepping motor but preferably a varactor or varactors in the tuner 5 are controlled by an applied staircase waveform signal. Clock pulses from 10 are applied to bi-stable dividers and AND gates (15, Fig. 2) in the scan generator 8 for producing control signals for switching transistors (17, Fig. 4) serially connected to resistors (18) with taps which are sequentially connected to a common output for producing the staircase signal. When the tuner is correctly tuned, a D.C. output at 7 may be applied to a switching transistor at input of the oscillator 10 to switch it off. The D.C. output is also used to control a recording apparatus 11 indicating the step, i.e. the frequency of incoming signal.
GB4413969A 1969-09-05 1969-09-05 Apparatus for sensing the frequency to which a wave signal receiver is tuned Expired GB1278957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4413969A GB1278957A (en) 1969-09-05 1969-09-05 Apparatus for sensing the frequency to which a wave signal receiver is tuned

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4413969A GB1278957A (en) 1969-09-05 1969-09-05 Apparatus for sensing the frequency to which a wave signal receiver is tuned

Publications (1)

Publication Number Publication Date
GB1278957A true GB1278957A (en) 1972-06-21

Family

ID=10431971

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4413969A Expired GB1278957A (en) 1969-09-05 1969-09-05 Apparatus for sensing the frequency to which a wave signal receiver is tuned

Country Status (1)

Country Link
GB (1) GB1278957A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471089A1 (en) * 1979-12-03 1981-06-12 Erim Automatic TV and radio audience size monitor - employs auxiliary receiver to measure parasitic radiation from local oscillator
GB2140601A (en) * 1983-05-25 1984-11-28 Agb Research Plc A television channel detecting arrangement for detecting to which channel a television set is tuned
US4577220A (en) * 1983-05-25 1986-03-18 Agb Research Plc Arrangement for detecting to which channel a television set is tuned

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471089A1 (en) * 1979-12-03 1981-06-12 Erim Automatic TV and radio audience size monitor - employs auxiliary receiver to measure parasitic radiation from local oscillator
GB2140601A (en) * 1983-05-25 1984-11-28 Agb Research Plc A television channel detecting arrangement for detecting to which channel a television set is tuned
US4577220A (en) * 1983-05-25 1986-03-18 Agb Research Plc Arrangement for detecting to which channel a television set is tuned

Similar Documents

Publication Publication Date Title
US2954465A (en) Signal translation apparatus utilizing dispersive networks and the like, e.g. for panoramic reception, amplitude-controlling frequency response, signal frequency gating,frequency-time domain conversion, etc.
US4346477A (en) Phase locked sampling radio receiver
GB1233324A (en)
GB1316871A (en) Tuning system for selecting channels
GB1241562A (en) Automatic tuning device
GB1278957A (en) Apparatus for sensing the frequency to which a wave signal receiver is tuned
GB1527147A (en) Channel selecting apparatus
GB1421093A (en) Frequency discriminator circuit arrangement
GB1147362A (en) Phase locked crystal controlled voltage variable oscillator
GB1483654A (en) Digital frequency indication in communications receivers
GB1218622A (en) Object identification system
US2827567A (en) Continuous precision tuning system
GB1089951A (en) Radio frequency spectrum generator
GB923822A (en) Improvements in radar transceivers
US4348770A (en) Manual channel selection apparatus
SU1413544A1 (en) Spectrum analyzer
GB1376208A (en) Remote control system
SU145631A1 (en) Method of compensating for strong impulse noise
SU425300A1 (en) DEVICE FOR HIGH-SPEED AUTOMATIC FREQUENCY ADJUSTMENT
SU640452A1 (en) Apparatus for receiving additional information transmitted in combination with television signal
JPS54157015A (en) Electronic channel selection unit
SU1501250A1 (en) Shaper of linearly frequency-modulated signals
SU1543545A1 (en) Frequency synthesizer
ES456643A1 (en) Electronic tuning system for radio receivers, with digital memorization of the signal frequency
JPS5457816A (en) Tuner

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees