- La MicroMega - Technologies for Telecommunications

The LMTD-05U transmitter is designed for DVB-T signals in UHF band, having up to 5 Wrms power with typical MER over 40 DB (SDT technology).
Basic configuration provides one ASI input, but several internal options allow other input choices:

• ASI
  

• DVB-S/S2
  

• DVB-T  
  

A common interface module to decode encrypted transport streams can be activated on the main input (ASI, DVB-S/S2 or DVB-T).
Further, enhanced hardware/software options allow advanced signal elaborations, like:

• Remultiplexing and LCN management (MFN only)
  

• TS multiplexing (MFN only)
  

• SFN adapter
  

• Internal Rx GPS module
  

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

Technical specifications :
 
General specifications:
Standard : DVB-T
Band : 474/858 MHz
Cooling :  Forced air
Power supply : 230 Vac ± 15%, 47 / 63 Hz
Power consumption :  Max 100 W
Protection:  Over power, ROS, Over temperature
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:

Input signal : MPEG-2 T.S. ASI format
Input level : 800 mV (±10%)
Data Rate : 270 MB/s
Data rate error : ±3ppm
Input connector: Female BNC
Input impedance :  75 Ω

Modulation specifications:

Modulation : OFDM
Carrier modulation : QPSK, 16 QAM, 64 QAM
IFFT : 2k and 8k
Guard interval : 1/4,  1/8,  1/16,  1/32
Code Rate :  1/2,  2/3,  3/4,  5/6,  7/8
Modulation bandwidth:   5MHz, 6MHz, 7MHz, 8MHz
Test functions :  CW mode and null-packets  Stream
Null-packet deletion :  Integrated
PID filtering: Integrated
PCR restamping : Integrated

Output specifications:
Output power : Max 5W rms adjustable
BER : 0 after 6 h measurement
MER : typical > 40 dB
Output impedance : 50 Ω
Output connector : female N