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7870 Interfacility Link Installation and User’s Guide page 1
Foxcom proprietary information
1 Introduction to the 7870 Interfacility Link
1.1 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Product Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Panel Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
The 7870 IFL is a 10 – 200 MHz IF fiber optic link used primarily in
short distance, single channel video applications with high input/
output power levels. The 7870 IFL consists of an optical transmitter
(7870T) which receives signals from satellite modems, video
modulators, or exciters and transmits them to an optical receiver
(7870R) via singlemode fiber.
The 7870T and 7870R modules plug into a 7180M, a 3U chassis and
power supply, which enables expansion of the system to
accommodate up to eight Sat-Light™ modules. Accessories include
the Model 7001P Power Supply, the Model 2040 1:1 Redundant
Switch, the Model 2100 Amplifier, and the Model 7050 Serial Optical
Multiplexer, an asynchronous data transceiver.
The 7870 IFL transmits all satellite modulation schemes - digital or
analog. Any FM modulated RF signal is transmitted accurately. The
RF signal is directly modulated and adds virtually no phase noise to
the original signal. The direct modulation, along with extremely flat
amplitude and group delay, guarantees low bit error rate (BER) and
high signal quality, independent of distance.
LEDs, and back panel monitors, and alarms allow for complete
system status monitoring and for interfacing with monitor and
control (M&C) systems. Gain Control at the Receiver sets the RF
level.