- La MicroMega - Technologies for Telecommunications

The LMMD-S (QPSK) modulator is a professional equipment designed to drive fixed or mobile microwave bridges, with IF output.

Basic configuration provides two ASI inputs with autoswitch. A software option for remultiplexing the transport input, including SFN adapter can be activated.
A common interface module to decode encrypted transport streams can be activated on the ASI input.

The equipment is managed with a bundle software through an USB or LAN port.
An HTTP server is available on the LAN interface, to allow a local or remote management by means of a browser interface through an IP connection.

The receiver comes with 8 on/off type telecontrol signals (4 opto-coupled inputs and 4 relay outputs), fully software programmable.

Technical specifications :
 
General specifications:
Cooling :  Forced air
Power supply : 230 Vac ± 15%, 47 / 63 Hz
Power consumption :  Max 50 W
Dimensions : 483mm(W) x 500mm(L) x 44mm(H)
Weight : 4,5 Kg
Working temperature : -5 ÷+45 °C
Working humidity : Max 90% not condensed

Input specifications (ASI):

Input signal : MPEG-2 T.S. ASI format
Input level : 800 mV (±10%)
Input selection : 1, 2, autoswitch
Input connector: Female BNC
Input impedance :  75 Ω

Modulation specifications:

Modulation : QPSK
Bit rate : 1 KSim/s ÷ ~ 16 MSim/s
Code Rate :  1/2,  2/3,  3/4,  5/6,  7/8
Roll-off : 0,20 / 0,25 / 0,35
Modulation bandwidth: Up to 21.6 MHz
Test functions :  CW mode and null-packets  Stream
Network adapter : Integrated
Null-packet insertion and deletion :  Integrated

Output specifications:
Output frequency : 70 MHZ
(other frequencies available on-demand)
Output level : -20÷0 dBm
Output impedance : 75 Ω
Output connector : female BNC