Common use of System Design & Assumption for Characterization, Simulations and Measurement Clause in Contracts

System Design & Assumption for Characterization, Simulations and Measurement. Information presented by the module vendor in relation to this document should be obtained from a “confined or ducted flow” system, as shown in figures 16 and 17. A blower duct is mounted so that the direction of air flow is parallel to the heat sink fins. Airflow measurement points are shown in figure 17 as point X. Air flow should be characterized using a calibrated hot wire anemometer placed at the air flow in inlet (F1). Thermocouples should be used to measure case temperature at the worst-case location on a given design. Each module vendor, as a minimum recommendation, should provide measurement data as recommended in figure 18. Identical PMD types will be expected to be characterized i.e. no mix of 850nm or 1310nm or 1550nm PMDs is mandated. When under-going thermal evaluation X2 transceivers should output the idle patterns on both the XAUI and PMD outputs. The idle patterns fro XAUI and PMD are described in IEEE 802.3ae sections 48.2.3.2 and 49.2.4.7 respectively. Other measurement data provided is at the discretion of the vendor.