JED - October 2015 - 34

late (and stimulate) it. The origins of
latency include delays caused by signal
processing devices, as well as in transferring data from function to function
(or instrument to instrument). Reducing latency to the greatest amount
possible is essential in EW system design, as response times are measured
in microseconds. So, even incremental
reductions are welcome. Reducing latency within the EW test system is key,
as well, and is aided immeasurably by
the choice of a high-speed communications bus that transfers data from point
to point within the system. Today this
is typically PCI Express (PCIe), which
has evolved to become much better integrated into the PC environment and
offers current transfer rates as high as
several Gbytes/sec.
Dealing effectively with the challenges posed by greater bandwidth and
latency, as well as other very important
metrics such as spurious-free dynamic
range (SFDR) and converter resolution,
are as important in the design of an EW
simulation system as it is for the EW
system itself.

Latency is another critical factor affecting EW
system performance, as well as the test system
designed to simulate (and stimulate) it.
SUMMARY
It is arguable that a fully-instrumented open-air test range is the most
effective way to evaluate an EW system (or radar system for that matter)
by evaluating it on a range and on the
platform on which it will be deployed.
However, a test range is not the place
to be conducting evaluations that could
be and logically should be performed
earlier in design and development process using a combination of COTS test
equipment and simulation software that
provides for a wide degree of flexibility,
repeatability, and the ability to handle
unique test cases.
No such COTS-based test solution is
flawless, and regardless of the equipment and software employed the process, it is as complex as the systems it
is designed to evaluate. However, the

approach is in keeping with the Pentagon's goal of achieving more cost-effective RTD&E, and as the test system
is a one-time purchase whose cost will
be amortized over the many EW and radar systems on which it will be used, it
is almost certain to be more widely employed in the future. a

About the Author: John Hansen is currently a solution planning engineer for
Keysight Technologies. He has more than
30 years of experience in system engineering and new product development
within the wireless, microelectronics and
defense industries, participating in such
programs as the F-15 radar, the Trident
II missile guidance system and the reactor and radiation monitoring set for the
Seawolf submarine.

The Journal of Electronic Defense | October 2015

34

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JED - October 2015

Table of Contents for the Digital Edition of JED - October 2015

The View From Here
Conferences Calendar
Courses Calendar
From the President
The Monitor
World Report
Going Small: Jamming the Mini-Drones
EW Simulation and Testing: Keeping Up With the Threat
Technology Survey: EW and SIGINT Antennas
EW 101
Index of Advertisers
JED Quick Look
JED - October 2015 - cover1
JED - October 2015 - cover2
JED - October 2015 - 3
JED - October 2015 - 4
JED - October 2015 - 5
JED - October 2015 - The View From Here
JED - October 2015 - 7
JED - October 2015 - Conferences Calendar
JED - October 2015 - 9
JED - October 2015 - Courses Calendar
JED - October 2015 - 11
JED - October 2015 - From the President
JED - October 2015 - 13
JED - October 2015 - 14
JED - October 2015 - The Monitor
JED - October 2015 - 16
JED - October 2015 - 17
JED - October 2015 - 18
JED - October 2015 - 19
JED - October 2015 - 20
JED - October 2015 - 21
JED - October 2015 - World Report
JED - October 2015 - 23
JED - October 2015 - 24
JED - October 2015 - 25
JED - October 2015 - Going Small: Jamming the Mini-Drones
JED - October 2015 - 27
JED - October 2015 - 28
JED - October 2015 - 29
JED - October 2015 - 30
JED - October 2015 - EW Simulation and Testing: Keeping Up With the Threat
JED - October 2015 - 32
JED - October 2015 - 33
JED - October 2015 - 34
JED - October 2015 - Technology Survey: EW and SIGINT Antennas
JED - October 2015 - 36
JED - October 2015 - 37
JED - October 2015 - 38
JED - October 2015 - 39
JED - October 2015 - 40
JED - October 2015 - 41
JED - October 2015 - 42
JED - October 2015 - 43
JED - October 2015 - EW 101
JED - October 2015 - 45
JED - October 2015 - 46
JED - October 2015 - 47
JED - October 2015 - 48
JED - October 2015 - Index of Advertisers
JED - October 2015 - JED Quick Look
JED - October 2015 - cover3
JED - October 2015 - cover4
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