COBHAM SOL4MTX Especificações descarregar pdf (Página 3)

For further information please contact: [email protected]

SECTION 1 – Technology and Applications

CS COFDM Digital Video Products

Cobham Surveillance has introduced a new family of COFDM (Coded

Orthogonal Frequency Division Multiplexed) digital video products

called SOLO, with domo technology at their core. These products

support narrowband (1.25MHz and 2.5MHz) and full DVB-T compliant

(6, 7, or 8MHz) channelisation. This line has specifically been

developed for worldwide customers in the law enforcement and

military markets, and for the manufacturers of Unmanned Ground

Vehicles (UGV)and Unmanned Aerial Vehicles (UAV)who support

their missions.

Digital technology has made rapid advancements in key areas over

the past few years. Notably the size, weight, power consumption

and cost have dropped by about 30% per year. Cobham now offers

digital systems that represent good value to users and are a better

fit for operational requirements than analogue systems. It also

develops specific implementations of COFDM technology for the

public safety and military markets.

Cobham Surveillance is committed to working with customers on

developing products that meet specific needs, and invites you to

discuss your requirements with its team.

The beneﬁts of digital transmission

The migration from analogue microwave systems to digital

transmission offers several key benefits to users:

Better Performance - By using digital modulation and

compression techniques, digital microwave provides superior

performance in non-line of sight and high multipath applications.

Unmanned Ground Vehicles operating in buildings or urban

environments, as well as low ﬂying Unmanned Aerial Vehicles, will

be able to transmit dramatically clearer video with less break up to

remote receive stations. Covert surveillance cameras no longer need

to have a clear line of sight to the receive location to have good

picture quality. Unlike analogue, digital video picture quality is noise

free regardless of distance

Efﬁcient Spectrum Utilisation -• Digital video systems

operate in a fraction of the spectrum utilised by typical analogue

transmitters, offering up to 8 digital video streams in the spectrum

previously used to transmit a single analogue channel. Cobham

SOLO products support 1.25MHz or 2.5MHz channels in the

narrowband conﬁguration or 6-8MHz channels in the full DVB-T

compliant conﬁguration. This compares to up to 25MHz for a

typical analogue channel. In addition, digital channels can be

located adjacent to each other without a guard interval. Analogue

systems tend to bleed over their allotted spectrum, requiring

several Megahertz of separation between channels at a minimum.

As regulatory agencies worldwide reallocate spectrum, it’s clear

that digital transmission enables more users to co-locate channels

in an increasingly crowded RF spectrum.

Secure Transmission Using Encryption -• Digital

transmission enables the secure transmission of video by using

AES128 or 256 bit encryption. There is no penalty to the user

in terms of performance. Analogue systems don’t offer this

capability as a feature. Analogue “cut and rotate” encryption

modules are expensive, often doubling the price of a system,

and not nearly as effective in securing the video data stream. In

addition, they add to the size of both the transmitter and the

receiver. Digital offers true encryption with no additional size

penalty. In the case of the Cobham receiver, AES encryption can

be carried on over the IP network

Set up for Internet Access -• Many customers are looking

at how to access their video from anywhere, at any time, over

the internet. Digital transmission makes it easier to send data

over the internet, avoiding the need for a separate analogue-to-

digital conversion. Cobham receivers have been designed to offer

internet connectivity by means of an optional TCP/IP Ethernet

network interface, accessed via a convenient RJ45 connection.

1 2 3 4 5 6 7 8 ... 60 61

Comentários a estes Manuais

Sem comentários

COBHAM SOL4MTX Especificações Página 3

Comentários a estes Manuais