Specifications

Benhur Corporation – Multidyne, International Sales

L-Band Fiber Optic Links

MULTIDYNE’s LFL-7000 Sereis L-Band Fiber Optic Link offer a high performance, cost effective alternative to conventional coaxial-

cabled systems. L-band Fiber Link cover the range of 950 - 2150 MHz (with optional coverage to 2500 MHz). They are used for the

transmission over Singlemode fiber optic cable of block downconverted C, extended C, X or Ku band signals. Transmission of L-band

Inmarsat signals as well as communication radar transmission and reception are also made possible using MULTIDYNE’s L-Band range

of products.

The LFL-7000 series functions as a transparent link between the satellite antenna and the Network Operations Center (NOC) or control

room. System limitations in using coaxial cable are overcome by the simplicity and performance of fiberoptic connections to provide the

highest levels in signal quality.

The system consist of an optical transmitter, which receives the RF signal from the LNB, and an optical receiver that connects to a

satellite receiver. All satellite modulation schemes are accommodated - digital or analog. Format independence is achieved by inherently

low phase noise. The RF signal, an entire L-Band polarization, is converted at the transmitter to an optical signal by direct modulation of a

semiconductor laser diode. At the receive end, the optical signal is converted back to an RF signal by a photodiode.

MULTIDYNE offers a wide range of products to meet all your specific satcom needs. Short distance downlink applications can be

achieved using our cost effective isolated Fabry-Perot products while professional and more demanding long distance or multi-carrier

applications can be met using our high dynamic range DFB lasers - delivering excellent signal quality even under varying conditions.

Product options include Automatic and Manual Gain Control. Automatic Gain Control (AGC) at the transmitter site sets and maintains

optimum operation over a wide range of input signal levels. At the receiver site AGC maintains the RF level regardless of optical power or

distance from transmission site. Alternatively, Manual Gain Control (MGC) at the transmitter site allows the system operator to maintain

optimum operation over a wide range of input signal levels on the transmitter site and RF output level on the receiver site.

Front panel RF test ports, LEDs, back panel monitors and alarms allow for complete status system monitoring and for interfacing with

M&C systems. All transmitter units can provide 14VDC/350mA for optional LNB powering. The LFL-7000 system consists of compact

modules that plug into a 19” wide 3U chassis/power supply. The chassis allows the accommodation of up to 8 modules in addition to main

and standby power supplies. Standalone versions are also available. Accessories are available to accommodate the wide variety of

system design preferences in use.

L-Band Interfacility Links

Model Application Frequency Optical Budget Gain Control Laser

Isolated Fabry-

LFL-7320 Short Distance Up/Downlink 950-2150 MHz 3 dB / 2 km Manual

Perot

Automatic/ Isolated Fabry-

LFL-7000 Intermediate Distance Up/Downlink 950-2150 MHz 6 dB / 10 km

Manual Perot

LFL-7225 Long Distance, Multi Carrier Up/Downlink 950-2150 MHz 16 dB / 40 km Manual DFB

LFL-7225H High Power, Multi Carrier Up and Up/Downlink 950-2150 MHz 3 dB / 2 km Manual DFB

LFL-7225-15 Ultra Long Distance, Multi Carrier, WDM, Up/Downlink 950-2150 MHz 16 dB / 60 km Manual DFB

LFL-7000

•　 Broadband Transmission – 950-2150 MHz (2500 MHz available)

•　 3, 6 & 16 dB optical budget versions available.

•　 Protocol transparent – transmits all video,audio and data modulation

•　 Wide dynamic, low noise.

•　 Transmission distances ranging from 100m to 60km

•　 Gain Control, Indicators, Alarms and Monitors

•　 Single or Multi Channel up or downlink transmission

•　 Interface with M & C Systems for remote signal monitoring