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MMDS means Microwave Multipoint Distribution System; it has been developed as a cheaper alternative or support to the cable TV (CATV). MMDS has revealed extremely useful for sheltered area coverage, proprietary Tv distribution, Pay-TV point to point TV system. This multichannel transmitter has been designed to distribute a limited number of channels (typical 8, max 10) to small distance area (typical 5 Km). The desired TV channels may come from a terretrial transmitter, as well as from satellite or TV studios. The different channels, in the VHF/UHF band, feed the inside Up-converter module. The following RF chain amplifies and filters the signals. The 2.5 - 2.7 GHz output frequency is set according to the most European Countries standard. A dedicated down converter on each receiving antenna converts again the received microwave signals to the desired VHF/UHF TV channels.
MMDS Microwave Multipoint Distribution System

APPLICATIONS
TV transmission systems point to point and point to multipoint

TECHNICAL SPECIFICATIONS

MMDS Microwave Multipoint Distribution System ( 100 mW, 1 W and 5 W) *
RF in 662 - 862 MHz (on request 470 - 670 MHz)
RF out 2.5 - 2.7 GHz
Sinthesized L.O. 1838 MHz (on request 2030 MHz)
Gain 30 dB (100mW) 40 dB (1W) 49 dB (5W)
Max output level
20 dBm typ. P 1dB at 2.7 GHz (127 dBuV)
30 dBm typ. P 1dB at 2.7 GHz (137 dBuV)
37 dBm typ. P 1dB at 2.7 GHz (144 dBuV)
Impedance input 75 W
Impedence output 50 W
out connectors N Female
In connectors BNC Female
Power supply 120 / 240v 50/60 Hz
Dimensions Rack 19" 2U
* This system is available in Rack 19"2U, and in an outdoor waterproof housing; on request the outdoor unit can be supply and control unit.
Copyright 2001 PM - all rights reserved - Realized by GlobalMedia