Evaluation Engineering - 19
interesting potential beyond
the immediate issue.
Because the I/O Switch is
located at the virtual measurement plane (with the exception of any lead cables), it
becomes the critical module
that selects the conductor
pair under test as well as the
launch pad for a wide range
of tests, from insertion loss
to continuity. The expansion
possibilities are intriguing,
considering an FPGA generating an eye pattern signal for
the overall integrity of the high-speed cable assembly. Utilizing
a standard 3.3 Vdc bias applied to individual pins adds the wiremap capability.
Furthermore, the VNA 2 Port S-Parameter measurement is a
very sensitive method for obtaining insertion loss on cable assemblies that include couplers (MIL STD 1553) and stubs that are
hard to disconnect physically. Finally, the capability of testing RF
cable assemblies for mismatch and damaged cable/connectors is
now within reach using this concept. "Normal troubleshooting"
scenarios are extremely rare-
often problems with Mil/Aero
systems cross the digital/analog/RF boundaries and a single
tester that is versatile and capable of isolating faults is well
within the realm of possibilities
for next gen MROs.
High-speed digital cables
are pervasive across platforms
where 10GHz Ethernet and
DVI cable assemblies are being
installed on aircraft to support
special SIGINT, COMINT, and
DragoonITCN
IMINT configurations. It will
be increasingly important to identify test tools that can accurately locate and assess cable assembly anomalies and failures.
Bob Appenzeller is CEO of Dayton, OH-based DragoonITCN, having started a small SETA shop in support
of DoD programs in 1992. He is a practicing engineer
supporting troubleshooting and modifying aircraft for
various missions worldwide. Appenzeller can be contacted at rappenzeller@dragoonitcn.com
Te c h n i c a l E n t e r p r i s e s
AUGUST 2019 EVALUATIONENGINEERING.COM
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19
7/16/19 3:26 PM
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Evaluation Engineering
Table of Contents for the Digital Edition of Evaluation Engineering
Editorial: More electric aircraft = more challenges
By the Numbers
Industry Report
MEA, instrument consolidation pushing vendors to innovate
Signal & Spectrum Analyzers
Utilizing the capability of VNA for Mil/Aero maintenance and troubleshooting
Modular Instruments
Power Supplies
Tech Focus
Featured Tech
Smart Fabrics
Evaluation Engineering - Cover1
Evaluation Engineering - Cover2
Evaluation Engineering - 1
Evaluation Engineering - By the Numbers
Evaluation Engineering - 3
Evaluation Engineering - Industry Report
Evaluation Engineering - 5
Evaluation Engineering - MEA, instrument consolidation pushing vendors to innovate
Evaluation Engineering - 7
Evaluation Engineering - 8
Evaluation Engineering - 9
Evaluation Engineering - 10
Evaluation Engineering - 11
Evaluation Engineering - Signal & Spectrum Analyzers
Evaluation Engineering - 13
Evaluation Engineering - 14
Evaluation Engineering - 15
Evaluation Engineering - 16
Evaluation Engineering - 17
Evaluation Engineering - Utilizing the capability of VNA for Mil/Aero maintenance and troubleshooting
Evaluation Engineering - 19
Evaluation Engineering - Modular Instruments
Evaluation Engineering - 21
Evaluation Engineering - 22
Evaluation Engineering - 23
Evaluation Engineering - Power Supplies
Evaluation Engineering - 25
Evaluation Engineering - Tech Focus
Evaluation Engineering - 27
Evaluation Engineering - Featured Tech
Evaluation Engineering - 29
Evaluation Engineering - 30
Evaluation Engineering - 31
Evaluation Engineering - Smart Fabrics
Evaluation Engineering - Cover3
Evaluation Engineering - Cover4
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