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Error! Unknown switch argument.
Overview
F800 can be used as an analogue one channel radio link. The whole link path
consists of two F800, normally for the 450 MHz band, F805. Each F800 is
equipped with a four-wire line interface, named LIJ. The transmitters run
continuously, which means that the link path is always open.
Configuration
The F800 is configurated as a link station by mounting three jumpers on the
back plane in the F800 cabinet. See separate description of the back plane.
The output power is adjusted to 6W. See separate description for the radio
board. The slots for line panels are left empty.
Electrical interface
The AF (Audio Frequency) interface, the LIJ board, have a 600 ohms
balanced AF input and a 600 ohms balanced AF output. Nominal AF levels
are -10 dBm. The output level is fixed to -10 dBm, and the input gain can be
adjusted to handle between -10 dBm and -30 dBm line level. If required the
board could be reconfigured by jumpers to act as a hybrid to make a two-wire
interface. The part number for the LIJ board is ROA 119 7534.
Physical interface
The four-wire line is connected to a modular connector on the rear of F800
marked ”LINE IN/OUT”. As a standard the F800 is delivered with a line cable
with a modular connector in one end and a Swedish telephone plug in the
other end. To use this cable in other countries than Sweden a corresponding
telephone jack should be ordered. Part number: HE 500011-0001.
Applications
A common application is to use the F800 link to substitute the four-wire line
between TC549 and base stations in MRS5000 systems. See figure 1! The
four-wire line between RC85 and TC549 can also be replaced by a F800 link
path.
Other ranges of use could be any application that requires AF signals to be
transferred wireless between two sites.
