Multicoupler for Commercial Television Broadcasting
Problem
An industry leader in worldwide sports programming and distribution had to replace their incumbent supplier of a receive multicoupler with a more reliable, lower profile unit for nationwide deployment of their updated satellite receive system. The requirement was to design, build and deliver in high volume robust, high isolation, high dynamic range, dual 1x8 rack mounted multicouplers, with production completed in 90 days.
Solution
Combining a number of unique features, the unit had to assure uninterrupted service and provide DC voltage to the LNBs located at the antenna feed, along with its primary function of splitting and distributing satellite broadcast IF signals across the 950-1450 MHz band. To achieve this, CAP Wireless developed a fully redundant, auto-switching unit. It incorporates two independent medical grade power supplies, each with individual fused power entry modules and AC power insertion. An innovative, proprietary solid state switching network enables either power supply to operate either or both of the internal amplified eight way RF power dividers, thereby providing multiple levels of redundancy. Additionally, the units may be powered by an external DC supply voltage applied to rear panel connections to support battery or auxiliary power operation.
Each multicoupler uses a low noise, high dynamic range, two stage amplifier for the signal received from the LNB. The amplified signal is split 8 ways by high isolation, in-phase splitters with a net gain of 0 dB through the unit.
The entire dual multicoupler is housed in a compact 1.75" single-rack-unit light weight 19" case. Type "F" 75 Ohm connectors located on the rear panel provide RF input and output connections. Fault and operational status is visually indicated by LEDs on the front panel.
CAP completed initial delivery of more than 1,000 units for integration into the customer's equipment within 90 days, enabling them to successfully meet their aggressive system upgrade rollout. If you view a major televised sporting event, it is likely those signals are routed through one of CAP's multicouplers.
