JPS5765050A - Measuring system for signal-to-noisde ratio - Google Patents

Measuring system for signal-to-noisde ratio

Info

Publication number
JPS5765050A
JPS5765050A JP55140274A JP14027480A JPS5765050A JP S5765050 A JPS5765050 A JP S5765050A JP 55140274 A JP55140274 A JP 55140274A JP 14027480 A JP14027480 A JP 14027480A JP S5765050 A JPS5765050 A JP S5765050A
Authority
JP
Japan
Prior art keywords
signal
modulation
switch
bpf53
consecutive
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
JP55140274A
Other languages
Japanese (ja)
Inventor
Tokihiro Mishiro
Kazuichi Hasegawa
Shinichiro Aoki
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 JP55140274A priority Critical patent/JPS5765050A/en
Publication of JPS5765050A publication Critical patent/JPS5765050A/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 measurement independently of burst signal and non-modulation consecutive signal, by providing a switch for the input of BPFs and controlling this switch with the self-running period at the reception of non-modulation consecutive signal. CONSTITUTION:A burst signal received at an input terminal 51 is split into two ways at a hybrid 52. One split signal is inputted to a BPF53 passing only through carrier via a switch 64. The output of the BPF53 is detected at a detector 54 to obtain a voltage corresponding to the level of carrier. This voltage is given to a sample hold circuit 55 and only the detected voltage of carrier at non-modulation part is sampled. On the other hand, when a non-modulation consecutive signal is received at the input terminal 51, the non-modulation consecutive signal is produced at the self-running period to control on/off of the switch 64. Thus, the non-modulation consecutive signal is also in burst shape for the input of the BPF53 to indicate the same step response in the case of burst signal.
JP55140274A 1980-10-07 1980-10-07 Measuring system for signal-to-noisde ratio Pending JPS5765050A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55140274A JPS5765050A (en) 1980-10-07 1980-10-07 Measuring system for signal-to-noisde ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55140274A JPS5765050A (en) 1980-10-07 1980-10-07 Measuring system for signal-to-noisde ratio

Publications (1)

Publication Number Publication Date
JPS5765050A true JPS5765050A (en) 1982-04-20

Family

ID=15264957

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55140274A Pending JPS5765050A (en) 1980-10-07 1980-10-07 Measuring system for signal-to-noisde ratio

Country Status (1)

Country Link
JP (1) JPS5765050A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5552652A (en) * 1978-10-13 1980-04-17 Nippon Telegr & Teleph Corp <Ntt> Frame synchronizing unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5552652A (en) * 1978-10-13 1980-04-17 Nippon Telegr & Teleph Corp <Ntt> Frame synchronizing unit

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