JPS57133730A - Squelch system - Google Patents

Squelch system

Info

Publication number
JPS57133730A
JPS57133730A JP56019066A JP1906681A JPS57133730A JP S57133730 A JPS57133730 A JP S57133730A JP 56019066 A JP56019066 A JP 56019066A JP 1906681 A JP1906681 A JP 1906681A JP S57133730 A JPS57133730 A JP S57133730A
Authority
JP
Japan
Prior art keywords
turned
switch
tone
station
audio output
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
JP56019066A
Other languages
Japanese (ja)
Inventor
Masaki Onishi
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP56019066A priority Critical patent/JPS57133730A/en
Publication of JPS57133730A publication Critical patent/JPS57133730A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Abstract

PURPOSE:To distinguish own station and other stations, by attenuating a monitor output of other stations, when a channel is monitored for idle line. CONSTITUTION:A tone squelch circuit 3 transmits H when it detects a tone of one's own station and transmits L in other case. When own station tone is received with a tone squelch controlling switch 6 turned on, a switch 2 is turned on and a switch 9 is turned off, a normal audio output is obtained, and when no own station tone is provided, the switch 2 is turned off and the audio output is interrupted. Next, when the tone squelch controlling switch 6 is turned off, if the own station tone is received, the switch 2 is turned on and the switch 9 is turned off and normal audio output is obtained. If no own station tone is present, the switch 2 is turned on and the switch 9 is also turned on, and since an attenuator 8 is operated, an audio output smaller than normal case can be obtained.
JP56019066A 1981-02-13 1981-02-13 Squelch system Pending JPS57133730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56019066A JPS57133730A (en) 1981-02-13 1981-02-13 Squelch system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56019066A JPS57133730A (en) 1981-02-13 1981-02-13 Squelch system

Publications (1)

Publication Number Publication Date
JPS57133730A true JPS57133730A (en) 1982-08-18

Family

ID=11989048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56019066A Pending JPS57133730A (en) 1981-02-13 1981-02-13 Squelch system

Country Status (1)

Country Link
JP (1) JPS57133730A (en)

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