JPS5765051A - Measuring system for signal-to-noise ratio - Google Patents

Measuring system for signal-to-noise ratio

Info

Publication number
JPS5765051A
JPS5765051A JP55140275A JP14027580A JPS5765051A JP S5765051 A JPS5765051 A JP S5765051A JP 55140275 A JP55140275 A JP 55140275A JP 14027580 A JP14027580 A JP 14027580A JP S5765051 A JPS5765051 A JP S5765051A
Authority
JP
Japan
Prior art keywords
signal
objective
amplifier
burst
modulation part
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
JP55140275A
Other languages
Japanese (ja)
Inventor
Tokihiro Mishiro
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 JP55140275A priority Critical patent/JPS5765051A/en
Publication of JPS5765051A publication Critical patent/JPS5765051A/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 to compress an input level variance, by controlling a variable amplifier only with a signal detecting an objective reception burst head non-modulation part. CONSTITUTION:A burst signal received at an input terminal 1 passes through a variable amplifier 14 and split into two at a hybrid 2. One is inputted to a detector 4' via a BPF3 passing only through carrier. The output voltage of the detector 4' is sampled only for the detected voltage of the carrier at the head non-modulation part of the received burst signal at a sampling circuit 5 and other parts are in holding. The output voltage of the circuit 5 is smoothed at an LPF6 and given to a divider 11 and also fed back to an amplifier 14. Thus, the amplifier 14 is controlled with a signal detecting the reception burst head non-modulation part to be objective. Thus, the objective burst signal only can be kept constant at all times. Thus, the input level variance can be compressed.
JP55140275A 1980-10-07 1980-10-07 Measuring system for signal-to-noise ratio Pending JPS5765051A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55140275A JPS5765051A (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
JP55140275A JPS5765051A (en) 1980-10-07 1980-10-07 Measuring system for signal-to-noise ratio

Publications (1)

Publication Number Publication Date
JPS5765051A true JPS5765051A (en) 1982-04-20

Family

ID=15264979

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55140275A Pending JPS5765051A (en) 1980-10-07 1980-10-07 Measuring system for signal-to-noise ratio

Country Status (1)

Country Link
JP (1) JPS5765051A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63156456A (en) * 1986-12-19 1988-06-29 Fujitsu Ltd Method for measuring s/n of data communication line
EP2162982A1 (en) * 2007-06-20 2010-03-17 Telefonaktiebolaget LM Ericsson (PUBL) An oscillator arrangement

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525269A (en) * 1978-08-11 1980-02-22 Mitsubishi Electric Corp Automatic gain control circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525269A (en) * 1978-08-11 1980-02-22 Mitsubishi Electric Corp Automatic gain control circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63156456A (en) * 1986-12-19 1988-06-29 Fujitsu Ltd Method for measuring s/n of data communication line
EP2162982A1 (en) * 2007-06-20 2010-03-17 Telefonaktiebolaget LM Ericsson (PUBL) An oscillator arrangement
EP2162982A4 (en) * 2007-06-20 2012-06-20 Ericsson Telefon Ab L M An oscillator arrangement
US8525604B2 (en) 2007-06-20 2013-09-03 Telefonaktiebolaget L M Ericsson (Publ) Oscillator arrangement

Similar Documents

Publication Publication Date Title
GR3030105T3 (en) Method of preparing a radioactive rhenium complex solution.
EP0402030A3 (en) Apparatus for detecting fluorescence of a luminescent material
AU554501B2 (en) Improvements in and relating to testing coins
GB1181510A (en) Single Beam Photometric System.
JPS57190251A (en) Absorbance system analyzer
AU6843590A (en) A circuit for measuring the level of an electrical signal and including offset correction means, and application thereof to amplifiers having automatic gain control
JPS5765051A (en) Measuring system for signal-to-noise ratio
GB1523648A (en) Apparatus for determining a power function
GB2022255A (en) Acoustic measuring instruments e.g. flowmeters
JPS5437403A (en) Automatic gain control method for light receiving circuit
JPS5765048A (en) Measuring system of signal-to-noise ratio
EP0440820A4 (en) Automatic measurement-range changeover device for surface area measurement apparatus
JPS56112662A (en) Measuring apparatus for loss of capacity element
JPS57111457A (en) Voltage measuring device using electron beam
JPS5765049A (en) Measuring system for signal-to-noise ratio
JPS5765050A (en) Measuring system for signal-to-noisde ratio
JPS5758480A (en) De-emphasis circuit
GB1532407A (en) Blood analyzer
JPS5582025A (en) Spectrophotometer of sample alternate measurement type
JPS5631656A (en) S/n instrument and s/n measuring method
JPS5725730A (en) Detecting device of noise intensity
JPS5784373A (en) Distance measuring device by light wave equipped with automatic light adjusting device
SU697837A1 (en) Radiation meter
JPS53134493A (en) Electrolyte measuring system
JPS56146367A (en) Automatic control system for white compression characteristic of pickup device