MATV Headend System Design
Headend System requirements differ for each location. TLE offers assistance in system design, layout, and product selection. Sample Headend diagram & description shown below.
Basic Info about the Headend should include ...
- Available broaddcast signals: list receivable channels from antenna location
- Additional RF signals: list other signals to include (e.g., vcr, camera, satellite receiver)
- Signal strength: measurements - antenna + FSM/ spectrum analyzer, or, estimated levels - contour maps, or, visual check - signal level vs. picture quality (using RF pads).
- Reception quality: Access need for preamplifiers, filters or traps ? Describe any reception difficulties (e.g., ghosting / noise / weak signal / overloading / adjacent channel interaction).
- Antenna network: describe quantity and types of antennas (see example below)
- Cable length & type: antenna down lead to headend equipment, e.g., 200 ft.RG-6U
- Channel lineup and frequency allocation: Channels to
be delivered to distribution system - VHF/UHF or CATV. Adjacent (e.g.,
2, 3, 4), or, Non-adjacent (e.g., 2, 4, 6)
(see freq chart)
- One-way or two-way system: Using the sub-TV band (5 - 40 MHz) ?
- Signal output from headend and details of distribution system: To determine the signal level required from the Headend system, a basic description of the distribution system is needed - info to include: layout of complex, number of outlets and representative cable run lengths.
Click for Headend Diagram - Fig 1. 36 Channel MATV Headend System
This example headend serves to familiarize you with some of the headend products offered by TLE. Explanation of headend diagram provided below, or click on highlighted area ...