Kontron AT8404 - Manual (Page 122)

Thermal Considerations
109 AT8404 User Guide
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5.3 Airflow
In order to allow system integrators to optimize environmental conditions for the AMCs operated in the
AT8404, airfow measurements according to CP-TA Interoperability Compliance Document (AdvancedTCA
Book 1.1) were performed.
Two measurements were done with different AMC configurations. For each configuration, the pressure drop
between inlet and outlet is measured (upper graph). The red curve represents an ATCA reference board as
defined by the CP-TA. Another measurement shows the airflow distribution from the front panel to the back-
plane connectors, separated into 8 sections. Sections 1 to 5 represent the AMC area between the front panel
and the AMC connectors, while sections 6 to 8 represent the component area of the Carrier between the AMC
connectors and the backplane connectors.
In configuration A, all four AMC slots are populated with blank fillers. These modules represent empty PCBs
with front plate mechanics. This corresponds to the lowest possible air impedance.
Figure 5-2: Configuration A - Airflow Measurement
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Airflow (CMM)
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Front Board Reference
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Test Section
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