Download Network Interface Unit (NIU)

DEFENCE SYSTEMS
Network Interface Unit (NIU)
Dealing with the extensive range of
interfacing types is a significant issue for
baseband systems that need to provide
flexibility of interfacing and routing of
data between equipments.
This is particularly true for older legacy components
where the interface is often bespoke and does not
conform to any recognised international or national
standards. Even where compatibility is claimed by
equipment it is often only for part of a standard and
the interface does not necessarily conform at all levels
whether functional, electrical or physical. These cases
often require special hardware and software to be
introduced to enable compatibility for data exchange
between equipments.
The SEA Network Interface Unit (NIU) provides a flexible
and open solution to this problem. It is a versatile
system to interconnect a variety of digital and analogue
communication devices over a LAN or WAN. Using
personality cards (CAMS) ports can be configured for
isochronous serial, asynchronous serial, synchronous
serial or analogue formats. The core technology uses
data encapsulation techniques to route data over a
LAN or WAN between remotely located equipment and
systems.
engineering for success
This permits interfacing to a range of equipments
such as modems, encryption devices, and digital and
analogue terminals. The system has been proven with a
number of legacy communications systems including a
range of military radio systems and cryptographic units.
•A modular architecture supporting a wide range of interface types
•Handles all standard and non-standard serial data rates to 250
kbps
•Supports analogue signals up to 27 kHz bandwidth
•Interface type and electrical configuration by plug-in CAM
Modules
•Supports configurable clocking arrangements for synchronous
circuits
•Data routing allows one-to-one or one-to-many configurations
•Provides unlimited physical separation between equipments
•Dual-redundant power supply and network connectivity for high
availability
•19” rack form factor providing 12 channel (2U) capacities
•Controlled from a single control position on the network
•Remote access to control, status and monitoring data
•Proven with a large range of military communications equipment
Interfaces:
Standard Serial
•Synchronous serial (external/internal clocking)
•Asynchronous and isochronous serial with flow
control
•Standard and non-standard baud rates (50-115,200
baud)
•Synchronous rates to 250 kbps
•Single ended or differential signals (EIA232/EIA422)
•Latency <20 mS, jitter <1 mS
•Bit error rates <3 in 1010
•RS-530A signal and physical interface (DB25)
Military Serial
•Programmable MIL-STD-188-114A
•Synchronous serial (external/internal clocking)
•Asynchronous serial with flow control
•Standard and non-standard baud rates (50-115,200
baud)
•Balanced or unbalanced signals
•Latency <20mS, jitter <1 mS
•Bit error rates <3 in 1010
•37-way physical connector (DB37)
Managemant and Control Software Interface
•Windows (XP, Vista and Windows 7) compatible and
provides the following functionality through its API:
•Circuit operation
•Mode (isochronous, asynchronous serial,
synchronous serial, analogue)
•Sampling/clock frequency
•Packet size
•Receive buffer size
•Clocking modes
•Connectivity
•Network configuration
•IP address
•Gateway address
•DNS address
•Netmask
•DHCP operation
•Ethernet mode
•Interface settings
•Signal logic sense
•Default state
•Loopback state
•Interface status
•Various including, buffer over runs, under runs,
missing and bad packets, power status, sampled
signal states, temperature and loopback mode
Analogue Serial
•Bi-directional analogue full duplex
•8 control signals in each direction
•16-27 kHz bandwidth
•0dBm levels (600W load, 100W source)
•Linear ADC
•Noise floor < -60 dBm over full bandwidth
•0.5% THD
•44-way high-density D (HD44) connector
For further information
T: +44 1373 852000
F: +44 1373 831133
[email protected]
www.sea.co.uk