JPS5547777A - Modulation conversion system - Google Patents

Modulation conversion system

Info

Publication number
JPS5547777A
JPS5547777A JP11918278A JP11918278A JPS5547777A JP S5547777 A JPS5547777 A JP S5547777A JP 11918278 A JP11918278 A JP 11918278A JP 11918278 A JP11918278 A JP 11918278A JP S5547777 A JPS5547777 A JP S5547777A
Authority
JP
Japan
Prior art keywords
modulation
frequency
signal consisting
modulation conversion
composite signal
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.)
Granted
Application number
JP11918278A
Other languages
Japanese (ja)
Other versions
JPS6242553B2 (en
Inventor
Akira Saito
Shuji Sato
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 JP11918278A priority Critical patent/JPS5547777A/en
Publication of JPS5547777A publication Critical patent/JPS5547777A/en
Publication of JPS6242553B2 publication Critical patent/JPS6242553B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Details Of Television Systems (AREA)
  • Television Systems (AREA)

Abstract

PURPOSE: To perform modulation conversion to TV composite signal consisting of FM-V and FM-A to TV broadcast signal consisting of FM-A(frequency modulation audio signal) and AM-V(amplitude modulation video signal), after direct frequency modulation for a given carrier with the output of intercarrier demodulator.
CONSTITUTION: TV broadcast signal consisting of AM-V and FM-A given to the input IN is composite signal consisting of video signal V and FM-A at the intercarrier demodulator ICDM, and after a given carrier fct having the frequency corresponding to the transmission frequency is in frequency modulation with the frequency modulator FMMD to obtain TV composite signal consisting of FM-V and FM-A from the output OUT. Thus, the circuit is simplified and modulation conversion of low cost and high fidelity can be made and it can be applied to the relay unit excellently.
COPYRIGHT: (C)1980,JPO&Japio
JP11918278A 1978-09-29 1978-09-29 Modulation conversion system Granted JPS5547777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11918278A JPS5547777A (en) 1978-09-29 1978-09-29 Modulation conversion system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11918278A JPS5547777A (en) 1978-09-29 1978-09-29 Modulation conversion system

Publications (2)

Publication Number Publication Date
JPS5547777A true JPS5547777A (en) 1980-04-04
JPS6242553B2 JPS6242553B2 (en) 1987-09-09

Family

ID=14754931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11918278A Granted JPS5547777A (en) 1978-09-29 1978-09-29 Modulation conversion system

Country Status (1)

Country Link
JP (1) JPS5547777A (en)

Also Published As

Publication number Publication date
JPS6242553B2 (en) 1987-09-09

Similar Documents

Publication Publication Date Title
JPS54121609A (en) Fm tuner
JPS54132123A (en) Special effect device for television video signal
JPS5539444A (en) Scramble/descramble system for catv broadcast
JPS54118724A (en) S/n improvement device for television video signal
JPS5547777A (en) Modulation conversion system
JPS55125786A (en) Recording and reproduction method for video signal
ATE6185T1 (en) TELEVISION RECEIVER WITH A SOUND CHANNEL WORKING ACCORDING TO THE DIFFERENTIAL CARRIER METHOD.
JPS5579593A (en) Color video signal reproduction system
JPS5367311A (en) Television video transmitter
JPS5593381A (en) Compensation unit for drop out
JPS54130835A (en) Noise reduction system of chrominance subcarrier
JPS5472913A (en) Frequency converter for vestigial side-bond amplitude-modulated wave
JPS54140816A (en) Frequency-modulated television signal trnasmission system of energy-diffusion type
JPS5389620A (en) Scanning speed modulator circuit
JPS5516590A (en) Television relay broadcasting equipment
JPS54133026A (en) Emphasis system for color television signal
JPS5452413A (en) Synchronous coupler for television signal
JPS5595471A (en) Television broadcast unit
JPS5539441A (en) Adjacent channel stealthy glance preventing device for catv system
JPS54134904A (en) Light transmission system
JPS5560391A (en) Photo recorder for low-carrier fm signal
JPS5555629A (en) Noise compensation system in audio signal intermittent transmission
JPS56103583A (en) Beam index type color television picture receiver
JPS57170678A (en) Sound demodulating system for television receiver
JPS5580986A (en) Recorder/reproducer for secam-system color television signal