F800 CIRCUIT DESCRIPTION
3 (25)
Uppgjord (även faktaansvarig om annan) -
Prepared (also subject responsible if other)
Nr
-
No.
KL/ECS/S/LT Magnus Lindahl
ECS/S/LT-96:5044
Dokansv/Godk -
Doc respons/Approved
Kontr
-
Checked
Datum
-
Date
Rev
File
KI/ECS/S/LTC
1996-06-06
A
965044.DOC
Radio board
The radio board includes the following major blocks; a frequency generator (two in
duplex version), a receiver and a transmitter. In addition to these blocks there are
circuits for internal power supply.
The transmitter is frequency modulated and the receiver is of super heterodyne type.
The frequency generator uses a phase locked loop (PLL) and is used to generate the
local oscillator signal for the receiver as well as the carrier for the transmitter. The type
of radio board used, depends on frequency band and operational mode.
Line interface
In the cabinet there are two slots for standard Euro size boards with 64-pin
connectors. The upper slot is used for LP100, LP200, and LP210 (MRS3000). The
lower slot is used for RC-5 and LP3 (MRS5000).
The line interfaces are described separately.
Programming
All customer specific parameter such as frequencies etc. are stored in a EEPROM in
the radio unit. Programming of the prom is described in document S/LT96:1014.
Options
The number of channels can be increased to 255 by fitting an option board.
If transparent data is required, this can be obtained by fitting a 4-wire interface to the
radio unit.
Note: Only one of the above mentioned options can be installed.
The option boards are described separately.
F800 can be used as a carrier controlled repeater station. This does not require any
additional hardware and all the necessary functions are described in the programming
manual, S/LT96:1014.