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MMDS system

* MMDS is compact and mobile
* Costs for arrangement of the MMDS are lower than costs   for arrangement of a cable network using a traditional   method
* Network deployment is effected during several days
* There are no obstacles for the MMDS such as rivers,   railways, highways, etc.

Product specifications
Frequency range 2500-2700 MHz
Output power per channel ≥600mW
Transmitting antenna gain ≥ 9 dB
Heterodyne frequency 1838 MHz
Input frequency range 662-862 MHz
Input level per channel 90dB/µV±5dB

The appearance of the transmitting MMDS-5 system is given in fig.1, fig.3 - structure scheme of an up-converter and a (CAF) amplifier of a transmitting MMDS system
Output signal frequencies of each MMDS-5 gathered into an MMDS-25 system, picture and sound carriers of each channel are given in fig.2. TV channels should be set to CAF inputs (see fig.2).
The appearance and structure chart of a receiving MMDS system are given in fig.4 and fig.5.

Recommended Cable Type to connect antenna to transmitter and connectors (2 connectors are needed for connection)

type attenuation ratio manufacturer approximate price
LDF5-50A cable 0,7dB/10m ANDREW 12$ for 1 m
Connector N Male L5NM-RP (for LDF5-50A cable)   ANDREW 40$ for 1 pc
5-50 cable 0,7dB/10m EUPEN 12$ for 1 m
NM 50V 7/8"M connector (for 5-50 cable)   EUPEN 40$ for 1 pc

MMDS Transmitting Antennas manufactured by:

type parameters Dimensions
9/180 Gain=9dB, antenna diagram=180o L=55cm, diameter=15cm
9/360 Gain=9dB, antenna diagram=360o L=105cm, diameter=15cm
13/360 Gain=13dB, antenna diagram=360o L=160cm, diameter=15cm


The peculiarity of a converter of a receiving MMDS system Beta tvcom in comparison to the converters manufactured by other companies is a great input signal dynamic range (approximately 35dB) whereas converters manufactured by other companies provide a 10-15dB dynamic range.