QSFP-DD Test Adapter User Manual
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©2019 Wilder Technologies, LLC
DocumentNo. 910 -0057-000Rev. A
The QSFP-DD Test Adapter Care and Handling Precautions
The QSFP-DD Test Adapters requires careful handling to avoid damage. Improper handling
techniques, or using too small a cable bend radius, can damage the coaxial cable connections
within the adapter housing or the cables themselves. This can occur at any point along the
cable. To achieve optimum performance and to prolong the QSFP-DD TPA’s life, observe the
following handling precautions:
•CAUTION 1: Avoid Torque Forces (Twisting)
While individual coaxial cables within the test adapter have some rotational freedom,
twisting the QSFP-DD TPA as a unit, with one end held stationary, may damage or severely
degrade performance. Adherence to Caution 5 (below) helps to avoid twisting.
•CAUTION 2: Avoid Sharp Cable Bends
Never bend coaxial cables into a radius of 26 mm (1-inch) or less. Never bend cables
greater than 90°. Single or multiple cable bends must be kept within this limit. Bending the
QSFP-DD TPA cables less than a 26mm (1-Inch) radius will permanently damage or severely
degrade test adapter performance.
•CAUTION 3: Avoid Cable Tension (Pull Forces)
Never apply tension (pull forces) to an individual coaxial cable that is greater than 2.3 kg
(5 lbs.). To avoid applying tension, always place accessories and equipment on a surface
that allows adjustment to eliminate tension on the QSFP-DD TPA and cables. Use adjustable
elevation stands or apparatus to accurately place and support the QSFP-DD TPA.
•CAUTION 4: Connect the QSFP-DD Test Adapter First
To prevent twisting, bending, or applying tension to the coaxial cables when connecting a
QSFP-DD TPA, always attach the QSFP-DD TPA to the device under test (DUT) or cable under
test before attaching any 2.92mm (K-Style) connectors. Carefully align the QSFP-DD
connectors and then gently push the connectors together until fully seated.
If the QSFP-DD TPA must be turned or twisted to make connection to the DUT, avoid using
the QSFP-DD TPA housing alone to make this occur.Try to distribute the torque forces along
the length of the test setup and cabling. If this is not possible, it is recommended to first
loosen or disconnect the 2.92mm (K-Style) connections at the QSFP-DD TPA, make the
connection to the DUT and then re-tighten or attach the test equipment leads.
NOTE: Only grip the test adapter housing when inserting or
extracting the QSFP-DD TPA to or from the DUT. Pulling directly on
the QSFP-DD TPA cables or using them to insert the QSFP-DD TPA
may cause damage.
•CAUTION 5: Carefully Make High-Speed (2.92mm, K-Style) Connections
To connect the QSFP-DD TPA 2.92mm (K-Style) connectors, follow these steps:
1. Hold the cable stationary by grasping the cable at the black heat-shrink section
near the High-Speed connector.
2. Insert the mating High-Speed connector barrel and hand-tighten the free-spinning
2.92mm connector (K-Style) nut onto the connector while avoiding pulling,
bending, or twisting the QSFP-DD TPA coaxial cable.
