JPS5765049A - Measuring system for signal-to-noise ratio - Google Patents

Measuring system for signal-to-noise ratio

Info

Publication number
JPS5765049A
JPS5765049A JP55140273A JP14027380A JPS5765049A JP S5765049 A JPS5765049 A JP S5765049A JP 55140273 A JP55140273 A JP 55140273A JP 14027380 A JP14027380 A JP 14027380A JP S5765049 A JPS5765049 A JP S5765049A
Authority
JP
Japan
Prior art keywords
signal
split
switch control
control type
voltage
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
JP55140273A
Other languages
Japanese (ja)
Inventor
Tokihiro Mishiro
Kazuichi Hasegawa
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 JP55140273A priority Critical patent/JPS5765049A/en
Publication of JPS5765049A publication Critical patent/JPS5765049A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/26—Measuring noise figure; Measuring signal-to-noise ratio

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To enable the measurement with high accuracy stability even to a high speed burst signal, by integrating detected outputs with a switch control type integrator controlled with non-modulation prediction signal. CONSTITUTION:A burst signal received at an input terminal 1 is split into two directions at a hybrid 2. The split one signal is inputted to a BPF3 passing only through carrier, and the output of the BPF3 is detected at a detector 4 to obtain a voltage corresponding to the level of carrier. This voltage is integrated at a switch control type integrator 14 controlled with a non-modulation prediction signal. Another signal split at the hybrid 2 is detected 8 via a BPF7 passing only through noise to obtain a voltage corresponding to noise level. This voltage is integrated at a switch control type integrator 15 similar to the integrator 14. The output of the integrators 14, 15 is taken for the ratio at a divider 11. With this system, since a sample hold circuit with slow response speed is not used, the system can be applied to a high speed signal.
JP55140273A 1980-10-07 1980-10-07 Measuring system for signal-to-noise ratio Pending JPS5765049A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55140273A JPS5765049A (en) 1980-10-07 1980-10-07 Measuring system for signal-to-noise ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55140273A JPS5765049A (en) 1980-10-07 1980-10-07 Measuring system for signal-to-noise ratio

Publications (1)

Publication Number Publication Date
JPS5765049A true JPS5765049A (en) 1982-04-20

Family

ID=15264932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55140273A Pending JPS5765049A (en) 1980-10-07 1980-10-07 Measuring system for signal-to-noise ratio

Country Status (1)

Country Link
JP (1) JPS5765049A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52119248A (en) * 1976-03-31 1977-10-06 Hitachi Ltd Recorder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52119248A (en) * 1976-03-31 1977-10-06 Hitachi Ltd Recorder

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