Home     l     Profile     l     Team  Members     l     Product List     l     Services    l     Links     l     Contact Us     


METRODANE offers professional grade headend assembly services at competitive prices.
Headends are designed, assembled, and tested to your project’s specifications.
Further, METRODANE’s Pre-Built Headend Services treats your headend as a complete system, and not simply a collection of parts.
Why use METRODANE’s Pre-Built Headend Services?

• Faster preparation of a project Bill of Materials (BOM)

• Faster acquisition of headend components from racks, doors, cables, connectors, and electronics

• Quality component and system build including the preparation and dressing of system cables

• Individual component and system level testing against design specifications is easier and more accurate in METRODANE’s lab than in most field environments

• Faster turnaround than most field-built headends

• Complete system documentation that often gets overlooked in the field

• Helps ensure your project gets completed on time and on budget with higher levels of customer satisfaction

METRODANE’s Pre-Built Headend Services include:

• Rack assembly

• Equipment layout and racking

• All cables and connections using the highest shielded RF cable and connectors

• Professional labeling

• Balancing, Burning and More Balancing

• Official Headend Logbook

• All headends are wrapped in plastic and packed in a single or double wooden crate.

• For pricing and additional information on METRODANE’s Pre-Built Headend Services please contact a METRODANE sales   Representative.

Typical MMDS Set-up

The typical set-up of a MMDS system is shown in Exhibit 1 below.  The wireless system consists of head-end equipment (satellite signal reception equipment, radio transmitter, other broadcast equipment, and transmission antenna) and reception equipment at each subscriber location (antenna, frequency conversion device, and set-top device).

Signals for MMDS broadcast at the transmitter site originate from a variety of programs, in addition to local baseband services, which comprise the material to be delivered over MMDS.  All satellite delivered baseband formats are remodulated and subsequently up-converted to microwave frequencies.  Terrestrially delivered signals are passed usually through a heterodyne processor prior to up-conversion to the desired MMDS frequencies.

MMDS Repeater stations can be used to redirect MMDS signals to screened areas.  The range of a transmitting antenna can reach several miles depending on the broadcast power.  Transmission power used usually is in the 1 to 100 watt range, which is substantially below the transmission power requirements of VHF and UHF terrestrial broadcasting stations.

A rectangular parabolic-shaped antenna is conditioned to receive vertically polarized or horizontally polarized signals, or both, at each end user’s premises.  The microwave signals are then passed through a down-converter that converts the signal frequencies to standard cable VHF or UHF channel frequencies.  TV signals subsequently can be fed directly to a TV set or a set-top converter (i.e., descramble decoder) box.

The diagram below demonstrates how a MMDS System works.

MMDS System Diagram

Exhibit 1: A Typical MMDS System


Hybrid Fiber Coax Set-Up

Traditional Coaxial Architecture

The traditional CATV network is an all coaxial cable network. See the left side of Exhibit 2. The headend receives the TV signal typically from satellite, microwave, or fiber optic feeds. The TV signal is then broadcast to the consumer via a tree and branch coaxial cable architecture. CATV cables are predominately aerial and buried cables. The traditional coaxial architecture is a one-way network and not suited for voice and data communication services.

In the traditional architecture, trunk cables carry the TV signal from the headend to branch points where the signal is amplified and routed to either feeder cables or directly to distribution cables. Additionally, trunk cables may carry the feed to nodes (not shown) where it is then distributed. Feeder cables receive the signal from trunk cables and carry the signal deeper into the community where it is transferred to the distribution cables, which blanket the neighborhood and connect to consumer.

Hybrid Fiber/Coaxial Architecture

As noted above, the traditional CATV network restricted its use to one-way broadcasting of TV and video signals. As CATV companies began expanding into telephony, data, and Internet access services, they began transitioning their traditional networks to a Hybrid-Fiber/Coaxial architecture, commonly called an HFC network. A typical layout of an HFC network is provided on the right side of Exhibit 2.

Hybrid Fiber/Coaxial Architecuture

Exhibit 2: SEQ Exhibit\ * ARABIC 2 CATV Cable Network

HFC networks use fiber cables from the headend to feed nodes. The node serves as an equipment location and the interface point with the distribution network. Here, the optical signal is converted to an electrical signal for transmission to the home via ordinary coaxial cables. To minimize, if not eliminate repeaters on the coaxial cables and to provide telephony and Internet access services, the node sizes must be kept relatively small – typically under 1,000 households (in the traditional architecture, node sizes averaged 2,000 homes, but could be many times that size). As adoption of Internet access services increases, fiber-fed node sizes must be further reduced to minimize electrical interference on the remaining coaxial cables. HFC networks are robust two-way networks that can accommodate both data and internet services in addition to traditional CATV and video services.
To meet the your goals, we offer a solution that is fully integrated and fully redundant, end-to-end.  Materially, the key components and processes that we propose are similar to the services that we currently provide for a host of clients in the United States and abroad.

MetroDane Communications © All Rights Reserved 2008