This module, measured with nine different optical oscilloscope modules with the traditional, uncalibrated ER measurement (shown in purple bar graph), evaluates as between 5. Commonly called out in optical telecommunication standards, ER is. Extinction Ratio (ER) is the ratio of the optical power when the transmitter is in the logic 1 state (P₁) to the optical power when it is in the logic 0 state (P₀): Higher ER: Stronger contrast between “on” and “off,” making signals easier to detect. Lower ER: Weak contrast, leading to difficulties. What are TDP, VECP, TWDP? A metric of transmitted eye quality appropriate to a low-bandwidth MMF link and an equalising receiver. Used in Use Tx, Rx reflection coefficients? Not addressed Other issues? Best starting point for a new project?Eye diagram showing an example of two power levels in an OOK modulation scheme, which can be used to calculate extinction ratio. P1 and P0 are represented by (binary 1) and (binary 0) respectively. The Cisco® 10GBASE SFP+ modules (Figure 1) give you a wide variety of 10 Gigabit Ethernet connectivity options for data center, enterprise wiring closet, and service provider. er in OMA required to achieve a Bit Error Rate 10E-12 with a degraded RX input eye. The RX inp tter (RX TJ) Total jitter measured when a stressed optical input s.