JPS57152240A - Milliwave band radio communication equipment provided with channel switching function - Google Patents

Milliwave band radio communication equipment provided with channel switching function

Info

Publication number
JPS57152240A
JPS57152240A JP56036387A JP3638781A JPS57152240A JP S57152240 A JPS57152240 A JP S57152240A JP 56036387 A JP56036387 A JP 56036387A JP 3638781 A JP3638781 A JP 3638781A JP S57152240 A JPS57152240 A JP S57152240A
Authority
JP
Japan
Prior art keywords
frequency
subcarrier
radio communication
communication equipment
channel switching
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
JP56036387A
Other languages
Japanese (ja)
Inventor
Takuro Oguchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56036387A priority Critical patent/JPS57152240A/en
Publication of JPS57152240A publication Critical patent/JPS57152240A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/06—Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier

Abstract

PURPOSE:To obtain a milliwave band mobile radio equipment used suitably for repeating of TV by exercising automatic control so that the subcarrier frequency of an audio signal varies with a radio frequency on a transmission side and an IF is made constant on a reception side. CONSTITUTION:On a transmission side, a subcarrier provided in the side band of video signal is frequency-modulated to transmit an audio signal corresponding to a channel of a radio frequency. On a reception side, on the other hand, automatic frequency control over a local oscillator to make an IF constant and leading- in operation by it are performed by a sweep oscillator 21. Then, a detector 26 outputs a frequency discriminating function signal that discriminates coincidence between a demodulated subcarrier frequency and a frequency set for every channel. The oscillator 21 is controlled by this frequency discriminating function signal to obtain a prespcribed subcarrier frequency after demodulation.
JP56036387A 1981-03-13 1981-03-13 Milliwave band radio communication equipment provided with channel switching function Pending JPS57152240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56036387A JPS57152240A (en) 1981-03-13 1981-03-13 Milliwave band radio communication equipment provided with channel switching function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56036387A JPS57152240A (en) 1981-03-13 1981-03-13 Milliwave band radio communication equipment provided with channel switching function

Publications (1)

Publication Number Publication Date
JPS57152240A true JPS57152240A (en) 1982-09-20

Family

ID=12468434

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56036387A Pending JPS57152240A (en) 1981-03-13 1981-03-13 Milliwave band radio communication equipment provided with channel switching function

Country Status (1)

Country Link
JP (1) JPS57152240A (en)

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