DESCRIPTION
4 (6)
Uppgjord (även faktaansvarig om annan) -
Prepared (also subject responsible if other)
Nr .-
No.
KI/ECS/S/MP Sven-Erik Wahl
KI/ECS/S/M-98:0957
Dokansv/Godk -
Doc respons/Approved
Kontr. -
Checked
Datum -
Date
Rev.
File
KI/ECS/S/MPC (Johan Gentz)
1998-11-13 A
2.2
OPERATIONAL FREQUENCY
The F800 are available in the following frequency bands;
68 - 88 MHz, 146 - 174 MHz and 370 - 470 MHz both for simplex and
duplex-versions. Nominal output power is 20 Watts and 6 Watts for
link stations. A total of 16 channels can be stored in the F800.
As an option, 255 channels can be offered.
3
RADIO UNIT
3.1
GENERAL
The radio unit contains two sub units, a radio board and a processor
board housed in a die cast housing. In addition a third sub unit can be
fitted for the addition of another option, i.e. 255 channel.
The connections between the radio unit and the cabinet are made
through connectors at the rear of the radio unit and corresponding
connectors in the cassette.
3.2
RADIO BOARD
The radio board contains the frequency generator, transmitter and
receiver. In addition to this, there are circuits for internal power
supply. The transmitter is frequency modulated and the receiver is of
double super heterodyne type. The frequency generator uses a
phase locked loop circuit (PLL). In a duplex station, two loop circuits
are fitted. The frequency generator produces local oscillator signals
for the receiver as well as the carrier for the transmitter. The type of
radio board used, depends on the operational mode of the base
station and the frequency range.
3.3
PROCESSOR BOARD
The processor board has an 8-bit processor with peripheral circuits
for controlling the frequency generator and the AF-switches. All
necessary software is stored in a EEPROM. The processor board
also provides DC power for the line interface.
