The SMSR is the power difference between the main peak power and the first side modes on the left and the right. The minimum value for a successful test is SMSR≥30 dBm. GouMax's SMSR Analyzer is advanced OSA modules with SMSR function (also called OSA-SMA module or SMSR OSA module). Optical transceivers are one of the indispensable key devices for optical communications that interconvert optical and electrical signals. There are various types of optical transceivers: SFP, QSFP, 200GbE, 400GbE, and other network standards. In recent years, optical transceivers have become. This video demonstrates side mode suppression ratio (SMSR) analysis using an AQ6370E optical spectrum analyzer from Yokogawa Test&Measurement and explains how to adjust the signal span to capture side modes and execute SMSR analysis to detect and locate the closest peaks fr.