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ASEAN / Australia (65) 6356 3900

Austria* 00800 2255 4835

Balkans, Israel, South Africa and other ISE Cou41 52 675 3777

Belgium* 00800 2255 4835

55 (11) 3759 7627

Canada 1 (800) 833-9200

Central East Europe and the B41 52 675 3777

Central Europe & 41 52 675 3777

D45 80 88 1401

F41 52 675 3777

France* 00800 2255 4835

Germany* 00800 2255 4835

Hong Kong 400-820-5835
Ireland* 00800 2255 4835

India +91-80-30792600

Italy* 00800 2255 4835

Japan 0120-441-046

Luxe41 52 675 3777

Macau 400-820-5835

Mongolia 400-820-5835

Mexico, Central/South America & Caribbean 52 (55) 56 04 50 90

Middle East, Asia and North 41 52 675 3777

The Netherlands* 00800 2255 4835

Norway 800 16098

People’s Republic of China 400-820-5835

41 52 675 3777

Portugal 80 08 12370

Puerto Rico 1 (800) 833-9200

Republic of Korea +822-6917-5000

Russia +7 (495) 7484900

Sin65 6356-3900

South 27 11 206 8360

Spain* 00800 2255 4835

Sweden* 00800 2255 4835

Switzerland* 00800 2255 4835

Taiwan 886-2-2656-6688

United Kingdom* 00800 2255 4835

USA 1 (800) 833-9200

* If the European phone number above is not accessible, please call +41 52 675 3777

Contact List Updated March 2013

For Further Information

Tektronix maintains a comprehensive, constantly expanding

collection of application notes, technical briefs and other

resources to help engineers working on the cutting edge of

technology. Please visit

www.tektronix.com

Information in this publication supersedes that in all previously published material. Specification and price change privileges

reserved. TEKTRONIX and TEK are registered trademarks of Tektronix, Inc. All other trade names referenced are the service

marks, trademarks or registered trademarks of their respective companies. 2/2014 25W-30137

Содержание WFM2300

Страница 1: ...How to Guide SDI Eye and Jitter Measurements WFM2300 Portable Waveform Monitor...

Страница 2: ...SDI Signal Path 3 How to Configure Video Session Display 4 How to Configure SDI Status Display 5 Cable Stress Loop 7 How to Configure SDI Stress Loop Amplitude 9 How to Configure Eye Measurements 10...

Страница 3: ...al Path Error Free signal path check for CRC HD or 3G or EDH Error Detection Handling if present within SD SDI signals Use the video session of the WFM2300 to determine this Determine if the signal pa...

Страница 4: ...or C Chroma samples This is shown in the lower statistics information of Figure 1 If the signal attached to the WFM2300 is error free then the Status will show OK in green If a CRC error occurs then t...

Страница 5: ...f cable The SDI status display provides an estimated cable length measurement based on selection of specific cable types NOTE Most manufacturers specify the performance of their equipment to a specifi...

Страница 6: ...selected by the user Source Level Shows the calculated launch amplitude of the signal source assuming a continuous run of cable Cable Type Shows the cable type used to make physical layer measurement...

Страница 7: ...gnal is producing CRC errors every second or every minute then the signal is marginal and the user needs to investigate further using the eye and jitter displays to determine the problem The cable typ...

Страница 8: ...nsmitted SDI signal If the device fails to recover the signal then the stress loop can be removed and the test signal generator output of the WFM2300 can be directly connected to the link to test the...

Страница 9: ...interfering signal is set to a frequency of 20MHz and causes varying vertical offset in the eye display This interfering signal is not actually jitter and therefore does not produce time or phase modu...

Страница 10: ...visual check on the characteristics of the received SDI signal and a variety of information can be determined from the display and the measurement values The following displays can be used to identify...

Страница 11: ...difficult to determine the rise and fall of the transitions although the amplitude and jitter of the signal can be measured Figure 8a Addition of stress loop 20m Belden 1694A Figure 8b Long length of...

Страница 12: ...those parts of the trace that occur more frequently A blue color is used for less frequently occurring parts of the trace with cyan green yellow and the red showing increasing frequency of that part...

Страница 13: ...arrel connector or problem with a cable or connections Unequal rise and fall time of the transitions causes a shift in the 50 point of the eye display as shown in Figure 10b In this case the rise time...

Страница 14: ...ble the menu 3 Using the up and down arrows to navigate to Display Type and press the right arrow to select the sub menu 4 Use the up and down arrows to select the Jitter Display 5 Jitter can be obser...

Страница 15: ...itter the value is reduced to 0 05UI In an active device typically more than one frequency of jitter is present within the signal and is a complex addition of various frequency components typically at...

Страница 16: ...n SDI device will track changes within a certain range at lower frequencies related to line and field rate At high frequencies it can be more difficult for the PLL to lock to these large changes and t...

Страница 17: ...when the 100kHz filter is selected then the PLL may have problems tracking these changes and cause a disturbance to the clock and data that will produce errors in the signal Another instance is if a j...

Страница 18: ...s function perform the following operation 1 Select one of the tiles 1 2 3 or 4 and press the PHY button 2 Select either the Eye or Jitter display 3 Press the DISPLAY button to bring up the menu 4 Use...

Страница 19: ...in order to represent the typical performance of a video device and to ensure a stable lock to the SDI signal The eye display itself is not bandwidth limited and therefore may show more jitter or wan...

Страница 20: ...o see if this interfering signal causes problems for the receiver Alternatively the user can select a pathological test signal to be generated from the WFM2300 to stress the performance of the PLL or...

Страница 21: ...7 5000 Russia 7 495 7484900 Singapore 65 6356 3900 South Africa 27 11 206 8360 Spain 00800 2255 4835 Sweden 00800 2255 4835 Switzerland 00800 2255 4835 Taiwan 886 2 2656 6688 United Kingdom 00800 2255...

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