JPS5630656A - Digital signal sn measuring apparatus - Google Patents

Digital signal sn measuring apparatus

Info

Publication number
JPS5630656A
JPS5630656A JP10547379A JP10547379A JPS5630656A JP S5630656 A JPS5630656 A JP S5630656A JP 10547379 A JP10547379 A JP 10547379A JP 10547379 A JP10547379 A JP 10547379A JP S5630656 A JPS5630656 A JP S5630656A
Authority
JP
Japan
Prior art keywords
signal
digital
noise
external input
multiplexing
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.)
Granted
Application number
JP10547379A
Other languages
Japanese (ja)
Other versions
JPS6256986B2 (en
Inventor
Kohei Ono
Hiroshi Yoshimura
Tomonori Aoyama
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.)
Anritsu Corp
NTT Inc
Original Assignee
Anritsu Corp
Nippon Telegraph and Telephone 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 Anritsu Corp, Nippon Telegraph and Telephone Corp filed Critical Anritsu Corp
Priority to JP10547379A priority Critical patent/JPS5630656A/en
Publication of JPS5630656A publication Critical patent/JPS5630656A/en
Publication of JPS6256986B2 publication Critical patent/JPS6256986B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE: To achieve a simultaneous measurement of signal and noise levels with a simple construction by multiplexing external input digital signals.
CONSTITUTION: An external input digital signal is applied to a multiplexing converter 6 whose output is impressed on a digital filter 7. After the signal and noise components extracted with a digital filter 7 is square detected with a square multiplier 10, they are applied to a digital integrator 14. Two unit delaying devices 12 and 13 composing a digital integrator 14 respectively provide integral outputs of the signal and noise components and the level difference between the signal and the noise is determined with a subtractor 17 after logarithmic conversion by logarithmic converters 15 and 16. The signal of the difference is represented by the SN value and indicated on the display.
COPYRIGHT: (C)1981,JPO&Japio
JP10547379A 1979-08-21 1979-08-21 Digital signal sn measuring apparatus Granted JPS5630656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10547379A JPS5630656A (en) 1979-08-21 1979-08-21 Digital signal sn measuring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10547379A JPS5630656A (en) 1979-08-21 1979-08-21 Digital signal sn measuring apparatus

Publications (2)

Publication Number Publication Date
JPS5630656A true JPS5630656A (en) 1981-03-27
JPS6256986B2 JPS6256986B2 (en) 1987-11-28

Family

ID=14408556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10547379A Granted JPS5630656A (en) 1979-08-21 1979-08-21 Digital signal sn measuring apparatus

Country Status (1)

Country Link
JP (1) JPS5630656A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59181449A (en) * 1983-03-31 1984-10-15 Jeol Ltd Two-step deflector for electron microscopes
US5204567A (en) * 1990-07-09 1993-04-20 Asmo Co., Ltd. Brushless motor with resilient shaft end-play absorber

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59181449A (en) * 1983-03-31 1984-10-15 Jeol Ltd Two-step deflector for electron microscopes
US5204567A (en) * 1990-07-09 1993-04-20 Asmo Co., Ltd. Brushless motor with resilient shaft end-play absorber

Also Published As

Publication number Publication date
JPS6256986B2 (en) 1987-11-28

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