MMDS Transmitter
ã2007г RadioFar
The Outdoor MMDS Transmitter is intended for use in the MMDS, WI-FI and other system
operating in 2300 to 2700 MHz frequency range . It is available in configurations of 20, 50, 100 Watt.
The transmitter supports all modulation schemes (both analogous and digital ones). It features
an RF Muting, which engages whenever IF signal at the Transmitter input becomes lower than
the IF threshold level. A Thermal Shutdown feature, which is incorporated for the transmitter
protection, disables the transmitter whenever its base plate temperature exceeds a temperature
limit. An overpower shutdown feature disables the amplifier whenever the RF output power is
detected to exceed an overpower limit. Built-in automatic gain control system provides nominal
value of output signal. The transmitter construction consists of 2 modules: the transmitter itself
located near transmitting antenna and power module which supplies power to the transmitter
and its remote control unit. The remote control unit provides monitoring of the transmitter statuses.
It display status of input and output signal; local oscillator; power amplifier; thermal and overpower
shutdown; cooling fan.
Антена MMDS
Technical parameters:
Output power at 1 dB gain compression 25W/50W/100W
Output frequency range 2300 to 2770 MHz
Bandwidth 200 MHz
Input frequency range 270 to 470 / 470 to 670 MHz
Input level -20 dBm to –10 dBm
Frequency stability 10-6
Out-band suppression > 60 dB
Compatible Modulation Schemes QPSK, 64/256QAM, COFDM, AM, FM
IF Input impedance and connector 75 Ohm, F- type female
RF Output impedance and connector 50 Ohm, N- type female
RF Monitoring Output 50 Ohm, N type female, 40 dB lower than RF level
Operating temperature range -35 to +40 С
Relative Humidity 100%
Power Consumption 60/300/500 VA
Cooling forced air, temperature control
Injector Powering 220 VAС
Transmitter Powering 48 VDC
Transmitter dimensions 600х600х320 mm
Power module dimensions Rack 3U
The MMDS antenna is intended for use in the MMDS and WI-FI systems. The antennas are available in
various models. The antenna radiation pattern in horizontal plane can be circular or sector. The radiation
pattern in vertical plane can be of 3 or 6 degrees depending on antenna gain. The antenna polarization
is vertical or horizontal.
Technical parameters
Gain 10/13 dB
H. plane beamwidth 120/240/360 degrees
E plane beamwidth 3/6 degrees
Polarization linear (vertical or horizontal)
Radiation Pattern Flatness <1dB
Input impedance and connector 50om, N- type female
Length 1500/3000mm
Diameter 160mm
Antenna
Transmitter
