JPS57190437A - Carrier transmitting device - Google Patents

Carrier transmitting device

Info

Publication number
JPS57190437A
JPS57190437A JP7531381A JP7531381A JPS57190437A JP S57190437 A JPS57190437 A JP S57190437A JP 7531381 A JP7531381 A JP 7531381A JP 7531381 A JP7531381 A JP 7531381A JP S57190437 A JPS57190437 A JP S57190437A
Authority
JP
Japan
Prior art keywords
supergroup
terminal
modulator
pilot current
inputted
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
JP7531381A
Other languages
Japanese (ja)
Inventor
Masao Mochizuki
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7531381A priority Critical patent/JPS57190437A/en
Publication of JPS57190437A publication Critical patent/JPS57190437A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/16—Monitoring arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To simplify the control of each supergroup level by time-sharingly controlling the gain of a modulator by each pilot current from the output point of a frequency division multi-carrier transmitting device having pilot current in every occupied band. CONSTITUTION:A frequency division multiplex signal with pilot current inputted from a terminal 11 is frequency-converted into standard supergroup signals by a supergroup receiver 12 and sent to a supergroup transmitter 14 through filters 131-134. Each standard supergroup signal is frequency-converted into the original line frequency band by a modulator and sent out from an output terminal 19. An transmitting output from the output terminal is inputted to a terminal 16 of a control device 15 and pilot current is extracted from the input signal. The extracted current is converted into DC voltage, which is inputted to the gain control terminal of each supergroup modulator through a terminal 17. An address corresponding to each pilot current is outputted from a terminal 18 to select a gain control terminal connecting to each modulator time-sharingly. Thus, the level of each supergroup can be automatically controlled by simple configuration.
JP7531381A 1981-05-19 1981-05-19 Carrier transmitting device Pending JPS57190437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7531381A JPS57190437A (en) 1981-05-19 1981-05-19 Carrier transmitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7531381A JPS57190437A (en) 1981-05-19 1981-05-19 Carrier transmitting device

Publications (1)

Publication Number Publication Date
JPS57190437A true JPS57190437A (en) 1982-11-24

Family

ID=13572634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7531381A Pending JPS57190437A (en) 1981-05-19 1981-05-19 Carrier transmitting device

Country Status (1)

Country Link
JP (1) JPS57190437A (en)

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