Aerospace & Defense Technology - September 2022 - 29

Ruggedized Computing
acquisition and pre-processing front end
that can be mounted behind wideband,
phased-array antennas.
Adjustable Center Frequency
Boosting Speeds for Signal Recorders
RF signal recorders serve several
important roles in defense electronics.
Developing and testing radar, EW, and
communications equipment and systems
requires validation of transmitted
RF signal characteristics. RF signal
recorders can capture these signals to
demonstrate and document proper
operation. Since receivers must be
resistant to noise and jamming, proper
operation can be confirmed by loading
challenging digital waveforms into
a real-time signal playback system to
produce analog IF or RF receiver test
signals. Finally, deployed RF signal
recorders in manned and unmanned
aircraft play a vital role in capturing
signals across hostile regions to ascertain
the types of EW, radar, and communications
equipment being used in
each location.
As military electronics technology
evolves, warfighting signals are growing
in number, complexity, frequency,
and bandwidth, thus driving tougher
requirements for RF signal recorder
and playback systems. Therefore,
recording systems need to handle
higher bandwidth signals, meaning
faster data converters, disk drives, and
system links.
Driven by huge commercial and
consumer markets for motherboards,
servers, and data centers, PCIe speeds
are now at Gen 4 using 8 Gbaud lanes,
and soon twice that for PCIe Gen
5. Because PCIe has overtaken SATA
speeds, it became the natural interface
choice for faster SSD drives that use the
latest non-volatile memory devices.
This led to the new NVMe (Non-Volatile
Memory Express) standard, which
defines products in many shapes and
sizes that all utilize the latest generation
PCIe interface with widths of × 2,
× 4, × 8 or ×16. Figure 6 shows the different
types of NVMe drives available
and their characteristics.
Available today are U.2 PCIe Gen
4 NVMe data center drives in the 2.5inch
form factor with 7.68 GB storage
capacity at reasonable prices. Read and
-10
-20
-30
-40
-50
-60
-70
10
Frequency (GHz)
Figure 5. Mercury AM3153 tunable filter bank MMIC device covers 6 GHz to 26.5 GHz with 48 bandpass
filters (7 shown).
20
30
M.2
* 4x PCIe
* Popular OS drive laptops
* Small Capacity
* Lower speeed and power
* 4x PCIe
U.2
* Supports Ger4 and Gen4 row
* Standard 2 5-inch housing
* Larger capacities than M2
Native
PCIe
* Up to x16 PCIe Gen3 or Gen4
* Hold up to four M.2 drives or
discrete memory devices
* Built switch or RAID
* Larger capacities than M2
* Enterprise & Data Center
Small form factor
EDSFF
* For server markets
* Supports PCIe Gen5
* Sizes include F1 S. F1, and F3
Figure 6. Several types of NVMe drives suit diverse application spaces.
write speeds are 6.5 and 3.5 GB/sec,
respectively, and quickly getting faster
as memory devices and PCIe speeds
continue to grow. By taking advantage
of these new technologies, it is now
Aerospace & Defense Technology, September 2022
mobilityengineeringtech.com
possible for a small, rugged 1/2 ATR
Mercury Talon recorder mounted in
a UAV to capture RF signals with an
instantaneous bandwidth up to 1 GHz
continuously for over 3 hours.
29
Insertion Loss (db)
http://www.mobilityengineeringtech.com

Aerospace & Defense Technology - September 2022

Table of Contents for the Digital Edition of Aerospace & Defense Technology - September 2022

Aerospace & Defense Technology - September 2022 - Intro
Aerospace & Defense Technology - September 2022 - Sponsor
Aerospace & Defense Technology - September 2022 - Cov 1
Aerospace & Defense Technology - September 2022 - Cov 2
Aerospace & Defense Technology - September 2022 - 1
Aerospace & Defense Technology - September 2022 - 2
Aerospace & Defense Technology - September 2022 - 3
Aerospace & Defense Technology - September 2022 - 4
Aerospace & Defense Technology - September 2022 - 5
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Aerospace & Defense Technology - September 2022 - Cov 3
Aerospace & Defense Technology - September 2022 - Cov 4
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