Logic ground – EXFO QA-805 User Manual
Page 15
Introduction
QualityAssurer 805
7
Physical Description of QA-805 Unit
Rear FRU Physical Layout
Logic Ground
Logic ground is used as reference for low voltage electronics and is
isolated from the chassis/shelf ground and 48 V power lines. For EMI/EMC
purposes, it might be needed to connect the logic ground and shelf ground
together.
To connect both grounds, a screw with a conductive metal washer is
installed in this location (GND) as shown in the following picture. To
disconnect, remove this screw.
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