JPS54507A - Receiver for multi-frequency signal - Google Patents

Receiver for multi-frequency signal

Info

Publication number
JPS54507A
JPS54507A JP6481877A JP6481877A JPS54507A JP S54507 A JPS54507 A JP S54507A JP 6481877 A JP6481877 A JP 6481877A JP 6481877 A JP6481877 A JP 6481877A JP S54507 A JPS54507 A JP S54507A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
receiver
multi
frequency signal
signal
mf
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.)
Pending
Application number
JP6481877A
Inventor
Kazuto Hirose
Akira Ichikawa
Original Assignee
Hitachi 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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q1/00Details of selecting apparatus or arrangements for establishing connections among stations for the purpose of transferring information via these connections
    • H04Q1/18Electrical details
    • H04Q1/30Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Abstract

PURPOSE:To enable to receive a FM signal without providing a specific artificial signal other than MF band signal together with the detection of MF signal at an audio band.
JP6481877A 1977-06-03 1977-06-03 Receiver for multi-frequency signal Pending JPS54507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6481877A JPS54507A (en) 1977-06-03 1977-06-03 Receiver for multi-frequency signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6481877A JPS54507A (en) 1977-06-03 1977-06-03 Receiver for multi-frequency signal

Publications (1)

Publication Number Publication Date
JPS54507A true true JPS54507A (en) 1979-01-05

Family

ID=13269200

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6481877A Pending JPS54507A (en) 1977-06-03 1977-06-03 Receiver for multi-frequency signal

Country Status (1)

Country Link
JP (1) JPS54507A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63227228A (en) * 1987-03-17 1988-09-21 Fujitsu Ltd Detector for modem training signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63227228A (en) * 1987-03-17 1988-09-21 Fujitsu Ltd Detector for modem training signal
JPH0526379B2 (en) * 1987-03-17 1993-04-15 Fujitsu Ltd

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