VIAVI TestCenter: What is the difference between using IMIX and using individual stream blocks?

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VIAVI TestCenter: What is the difference between using IMIX and using individual stream blocks?
• The iMIX table is % of frames.  So you are generating 55% of your frames as 64 byte frames. • The Stream table is % of bandwidth.  So 55% of your bandwidth is made up of 64 byte frames.   • Why does it make a difference? See table below: • Related info FAQ11671 This table shows an example of 100 frames.  • 55 frames are 64 bytes but if you calculate the bandwith used it is only 27.11% • The columns are: • |frame size in bytes | frame size + overhead | frame size + overhead in bits | frame count | total bits each frame size | total bits of a frame size / overall total bits | • Thus you can see that Percent of frames (IMIX) is different from Percent of Bandwidth