System 3422

FEATURES
System 3422
Sonobuoy Software Defined Radio Receiver
Based on commercial, off-the-shelf
(COTS), ruggedized hardware to
resist obsolescence
Architecture can be expanded
indefinitely in terms of channel
count
Superior dynamic range facilitates
receipt of close and distant
transmitter signals simultaneously
Fully integrated with optional turnkey
detection/tracking graphical
software
Ideal for helicopters, fixed-wing
aircraft, test ranges and surface
vessels
SWAP-optimized. Uses DSPCon
architecture to provide lower size,
weight, and power for given
capacity of any available solution
DSPCon's System 3422 has been specifically designed to
receive RF signals from sonobuoys operating in the range of 136
to 173.5 MHz and produce a digital stream of data containing the
information collected by each. The 3422 performs frequency
tuning on up to 15 sonobuoy channels and FM demodulation of
the received signal to recover the acoustic signal and encoded
GPS data collected by the sonobuoy. The system also digitizes
IRIG and analog input signals and merges this with the
sonobuoy data to form a single, time-aligned stream of digital
data that it transmits over Ethernet.
Based on true software defined radio technologies, the System
3422 is easily reconfigured when waveforms become more
complex and can receive any combination of analog and digital
sonobuoy radio signals with the same hardware, and without the
need to replace receiver cards or circuitry. And, because the
design approach is software-based, the System 3422 can more
readily accommodate future requirements including additional
encoding, encryption and modulation schemes, thereby resulting
in greater overall economies. With fewer parts than competitive
systems, DSPCon receiver solutions for sonobuoy signal
processing feature much higher mean time between failure
(MTBF) rates, greater spurious free dynamic range (SFDR)
performance, reduced weight and optimized footprints for better
onboard performance and overall efficiencies.

System 3422
RF Input
G bit Ethernet
BNC DB-9 RJ45
BNC (8) BNC
IRIG-B and 7 Audio Inputs
10 MHz Reference Clock
Gnd
Lug
90-264VAC @ 47-440Hz
splitter
IF Inputs
Trigger
98.304 MHz Clock
291.4 MHz Filter,
AIS Crystal Notch Filter
for
Channels 1 and 99
Protection
10
MHz
Ref
Input
27dB
Gain
87dB
Gain
CH1 CH2 SYNC CLK
DSPCon
BRD-7131PMC-100
16-channel
Narrowband DDR
DSPCon
BRD-PMC-16AI64SSA-
32-256K-I
16 Channel A/D
PMC Module
Ethernet
DSPCon
RS-232
BRD-MVME6100E-0173
G4 Power PC Baseboard
128 kHz Clock
RF
Down Converter
130 MHz Down
(154 MHz to 24 MHz) V M E B U S
Ch 3
Ch 2
Ch 4
Ch1
Out Out
Out
In
DSPCon
BRD-9711VME-03
2-channel, Low-Jitter
Frequency Synthesizer
Gnd
3U VME Chassis
+12V
VME chassis power supply
Chassis
Ground
Analog Specifications
• Simultaneously receives and processes up to 15 sonobuoy channel plus IRIG-B data
• Control: Ethernet or Mil-Std-1553
• Output Sampling Rate: 128,000 samples/sec
• IF Bandwidth (adjustable): 306/260/130 kHz
• Audio Bandwidth: 48 kHz
• Input Frequency: 136- 174 MHz
• AIS Blocking Filter: (160.9375 – 162.4375 MHz) & UHF Uplink Filter (for 291.4 MHz)
• Demodulation Schemes: FM, FSK, PSK, GMSK (GQPSK)
• Non-harmonic SFDR: 70 dB (typical)
• Time Alignment between Sonobuoy Audio Data and Analog Channels: 10 microseconds
• Front-end Receiver Sensitivity: 0.7 microvolt (-110dBm)
• Dynamic Range (combined RF amplifier and ADC): 120 dB
• Processing Capability: 1.3 GHz Power Pc Plus Virtex-2 per 16 channels
• Signal Support: ESM, Voice, DICASS & Time Code
• Output: Ethernet, 1553 and/or Analog Out
• Stanag 4283 Output Data Specification Compliance
Environmental Specifications
• Operating Temperature: +5° C - +45° C
• Non-operating Temperature: +0° C - +60° C
• Relative Humidity: < 90% (non-condensing)
• Size: 19” W x 15.75” D x 5.25” H (17.5” D w/rack handles)
• Weight: 28.35 lbs.
• Power: 90-132/180-264 VAC auto-ranging; 47-440 Hz; 3 Amps (typical); 250 Watts (typical)