JPS5673936A - S/n monitor - Google Patents

S/n monitor

Info

Publication number
JPS5673936A
JPS5673936A JP15093379A JP15093379A JPS5673936A JP S5673936 A JPS5673936 A JP S5673936A JP 15093379 A JP15093379 A JP 15093379A JP 15093379 A JP15093379 A JP 15093379A JP S5673936 A JPS5673936 A JP S5673936A
Authority
JP
Japan
Prior art keywords
signal
level
tone signal
tone
reception
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
JP15093379A
Other languages
Japanese (ja)
Inventor
Tadashi Iwata
Kazuo Kimura
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15093379A priority Critical patent/JPS5673936A/en
Publication of JPS5673936A publication Critical patent/JPS5673936A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/15—Performance testing
    • H04B17/19—Self-testing arrangements

Abstract

PURPOSE:To enable to monitor the S/N of channel with good accuracy independently of the reception level, by transmitting/receiving the S/N tone singal adjacent to transmission signal band in mobile radio system, and comparing the signal level and the noise level. CONSTITUTION:Tone signal fT produced from a S/N tone signal generating circuit of the base station, is modulated at a transmitter 8, it transmitted to a mobile station from a transmission antenna 9, and electromagnetic waves returned from the mobile station are received at an antenna 1, and the reception S/N tone signal fT(R) converted into voice band is mixed with a transmission tone signal fT at a mixer 10. Noise component fN is output from the mixer 10, and the noise voltage EN proportional to the noise level filtered and detected is input to a comparator 5. On the other hand, the signal voltage Es corresponding to the level of the signal fT(R) obtained from instantaneous values ea, eb of the reception tone signal fT(R) from commutating filters 17a,17b, is input to the comparator to obtain Es/EN, that is, S/N.
JP15093379A 1979-11-20 1979-11-20 S/n monitor Pending JPS5673936A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15093379A JPS5673936A (en) 1979-11-20 1979-11-20 S/n monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15093379A JPS5673936A (en) 1979-11-20 1979-11-20 S/n monitor

Publications (1)

Publication Number Publication Date
JPS5673936A true JPS5673936A (en) 1981-06-19

Family

ID=15507575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15093379A Pending JPS5673936A (en) 1979-11-20 1979-11-20 S/n monitor

Country Status (1)

Country Link
JP (1) JPS5673936A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0548446U (en) * 1991-11-25 1993-06-25 株式会社ケンウッド Cordless phone
JPH0832528A (en) * 1994-07-12 1996-02-02 Nec Corp Reception eb/no detection circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0548446U (en) * 1991-11-25 1993-06-25 株式会社ケンウッド Cordless phone
JPH0832528A (en) * 1994-07-12 1996-02-02 Nec Corp Reception eb/no detection circuit

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