Keysight U4421A MIPI D-PHY Analyzer and Exerciser Hardware and Probing Guide
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Setting up an E5381A Differential Flying Lead Probe Configuration for U4421A Module
4
Color Coding used for E5381A Flying Leads
The flying leads of the E5381A probe are color coded to help you identify the appropriate flying lead
cable to be used for probing a specific D-PHY signal. The cable connector component of the probe
displays this mapping between the colors of the seventeen flying leads and the channel number
assigned to each of these flying leads.
Figure 7
Color coding for flying lead cables
Component
Description
Cable Connector
This component connects the E5381A probe to the U4421A module via the U4201A/N2815A cable.
Flying Lead Cables
This component connects the E5381A probe to the DUT via the attachment accessories supplied with the probe. There are 17 flying lead
cables in each probe.
Each flying lead cable when connected to a DUT allows you to probe a lane which refers to either a forward direction differential pair OR
a reverse direction differential pair for a given lane.
Each flying lead has two cables:
•
the dark grey cable accepts the negative side of the differential probe input.
•
the light grey cable accepts the positive side of the differential probe input.
When probing single-ended signals (see
) using the E5381A probe, you must connect the dark grey (negative side) cable of the
used flying leads to the ground.
The tip of the each flying lead has positions for three pins. One pin connects to the negative side of the differential probe input. other to
the positive side, and the middle pin is not electrically connected to anything:
