KE Lee in Tektronix

오실로스코프를 이용한 측정방법

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레이다 관련 측정장비

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-. Oscilloscope

-. Pulse Counter

-. Signal Source

-. Power Meter

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오실로스코프 측정기능

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-. 전압-. 전류-. 주파수-. Amplitude-. 지터-. Power

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전압

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-. 최소 / 최대 측정전압 : 1mV-40kV-. probe name: BNC-P6015- 감쇄비 : 1X,1000X

전류-. 최대 측정전류 : 20kA Peak-. probe name: P6021 w/CT4- 감쇄비 : 1000X

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주파수

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-. 최대 측정 주파수 : 6GHz-. name: TDS6604

지터-. Period, Cycle, Random, Total jitter.

Power-. True, 역률 , Dynamic Road, Peak Finder

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지터 (Jitter)란 ?

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– What is jitter?– “The deviation of an edge from where it should be”

– Jitter is caused by:– (among other things)– Thermal noise– Crosstalk– Injected noise (EMI/RFI)– Circuit instabilities

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Jitter Measurement Summary

P2 P3 P4P1

Period Jitter = 18.3ps RMS (0.990/1.010/0.980/1.020)

Cy-Cy Jitter = 36.1ps RMS (0.020/-0.030/0.040)

TIE = 9.6ps RMS (-0.010/0.000/-0.020/0.000)

0.990ns 1.010ns 0.980ns 1.020ns

0.0ns 0.990ns 2.000ns 2.980ns 4.000ns

0.020ns -0.030ns 0.040ns

-0.010ns 0.000ns -0.020ns 0.000ns

period

cy-cy

TIE

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Total Jitter

– Total jitter is the sum of all these effects

Random components

Tj=(N*Rj)+Dj - Total Jitter where N is desired sigma

Deterministic jitter

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ET Cursor Method

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TDSJIT3 Real Time Method

– Proprietary Rj/Dj Separation and BER Estimation

– Based on real time acquisition data

– Includes Golden PLL TIE measurements

– Spectral Analysis used to decompose jitter

– Wide noise margin – works even with substantial system noise

– Works with short or long data repeats – no pattern details required (you provide bit rate and pattern length)

– Trigger at any random point in your data

– Works with CSA7000, TDS5000, TDS6000, TDS7000 instruments

– Results for Rj, Dj, Pj, DDj, DCD, BER

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Power Supply and Measurements

True Power

Apparent Power

Power Factor

Current harmonic

Total Harmonic Distortion

(THD)

Switching LossRDS on

SOAModulation Analysis

40KHzCLOCK

L

N

G

D

S

G

Core LossB-H Analysis

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Oscilloscope Based Power Measurement and Analysis for

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TDSJIT3 – TIE: Rj/Dj - BER

– Displays results for Rj/Dj– Rj/Dj results are only

available for TIE and PLL TIE measurements

– Rj/Dj is a two step process: make the TIE measurement; then calculate Rj/Dj

– Rj/Dj requires a repeating pattern, such that 100 repeats are captured in a single acquisition

– You must know and enter the pattern length Rj is RMS, Dj is Pk-Pk, Tj is Pk-Pk …

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THANK YOU FOR YOUR ATTENDANCE