Long Distance DWDM Link System

The ViaLiteHD Long Distance DWDM Link System (L-Band HTS 700-2450 MHz) is designed to connect distances up to 600 km apart. As well as being available for dark fiber, the system can now also be used on lit fiber through a specific choice and design of ViaLite DWDM components. Lit fiber can be a more cost-effective option for teleport operators.

DWDM allowing 4-96 links per strand of fiber
Ideal for 500 MHz and 800 MHz bandwidths used in High Throughput Satellites (HTS) – also full 700-2450 MHz capability
End-to-end system design
Full system testing over required distance prior to shipment
Up to 600 km with amplification and optical dispersion compensation
LNB/BUC power & on-module LNB switching options
Extreme temperature operation
True Plug and Play
Complete range of DWDM complementary products available
Ideal for Ka-Band diversity antennas – to combat rain fade
DWDM 10 MHz Reference & SNMP/Ethernet available
5-year warranty as standard

You may also be interested in our new System Designer tool, which allows you to build complex DWDM systems and review performance figures.

Datasheets

Product Inquiry

Example Long Distance DWDM Link System setup

L Band Yellow OEM DWDM Link (this type of module is used in Long Distance and Hyper Wide Dynamic Range Links)

ViaLite equipment setup 3U rack chassis, EDFA and DWDM DCF module

Ultra-wide dynamic range

One of the system’s key features is the ultra-wide dynamic range. This allows wider bandwidths to be transmitted including the entire 700-2450 MHz. For High Throughput Satellites (HTS), typical bandwidths are 500 and 800 MHz.

Due to the complexity of these systems, ViaLite offers system design and installation assistance. Please contact us for details.

Manned from a single control room

ViaLiteHD long distance links can also be controlled remotely using SNMP or Ethernet. This means multiple, unmanned teleport sites can be manned from a single control room, opening up new possibilities for teleport design.

DWDM – 96 links per fiber

The optional use of Dense Wave Division Multiplexing (DWDM) allows up to 96 links to be sent along a single fiber. These can be setup for short interfacility links (IFLs), as well as over long distances. The DWDM massively reduces the fiber count, minimizing fiber leasing/operational costs. DWDM requires the use of multiplexers, amplifiers and dispersion compensation.

Hardware formats

The L-Band HTS Long Distance link is available in a couple of formats:

– Single rack chassis card / Dual rack chassis card (Rx/Rx, Tx/Tx or Rx/Tx)

A fully populated 19” 3U ViaLiteHD rack chassis supports up to 26 links and accepts 13 RF cards, plus a Monitoring & Control Module and dual power supply modules. A 1U chassis accepts three RF cards or two RF cards with a Monitoring & Control Module.

– Yellow OEM Link

The Yellow OEM Link has been designed for system integrators and equipment manufacturers to build the link into their own designs.

A range of support modules and accessories is also available, including indoor rack chassis units and weatherproof outdoor enclosures.

See our hardware formats guide for more information.

Options include:

50Ω electrical connectors: SMA, MCX (only available on modules) or BNC
75Ω electrical connectors: BNC, MCX (only available on modules) or F-type
Optical connectors: SC/APC or FC/APC
Test ports on Tx & Rx modules
LNB powering through RF connection
Optional blind mate connectivity
LNB control circuit with 13/18VDC & 22 kHz tone.

RF Performance Characteristics

	L-Band HTS link (50Ω)	L-Band HTS link (75Ω)
Frequency range	700-2450MHz	700-2450MHz
Impedance, RF connector	50Ω SMA, blind mate	75Ω BNC, blind mate
VSWR	1:1.5(typ)	1:1.5(typ)
Link gain (Tx gain / Rx gain)	+15 (-5 / +20) ^a^h	+4 (-11 / +15) ^a^h
Flatness (full band, 100km, no DCF)	±0.5dB (typ) ^a^h	±0.6dB (typ) ^a^h
Gain stability	0.25 @ 24hrs dB (typ)	0.25 @ 24hrs dB (typ)
P1dB input	+1.5dBm (typ) ^a^k	0dBm (typ) ^a^k
IP3 input	+13.5dBm (typ) ^a^k^h	+13.5dBm (typ) ^a^k^h
Noise figure (default gain)	14dB (typ) ^a^h	23dB (typ) ^a^h
SFDR	114dB/Hz ⅔ (typ) ^a	114dB/Hz ⅔ (typ) ^a
Max RF input power without damage	15dBm	15dBm

^anominal input power @ 0dB optical loss
^hdefault gain setting
^kmeasured @ 1.2GHz

Optical Performance Characteristics

	L-Band HTS link
Laser type	High power distributed feedback (DFB) laser, thermo electric cooled
Optical wavelength	Full ITU, DWDM range of wavelengths are available See manual for details
Optical power output	7dBm (typ) - D laser