User's Manual

U
SER
´
S MANUAL FOR BAND SELECTIVE REPEATERS
MR
X
03P
User'sManual.doc Id.-No.:154999 Page 15 22-Jan-01
2.3.5. Control Module
The control module is a DOS compatible micro computer. The whole communication
between the provider and the repeater can be done via the control module.
The repeater can be controlled remotely or locally via a VT100 terminal or a PC
emulating the VT100 terminal.
To control the repeater remotely, use either the RS232 interface in connection with a
wireless modem or the PCMCIA interface in connection with a modem card and a
mobile or PSTN network adapter. The RS232 interface and the PCMCIA interface
are located on the control module.
Frequency, gain, power down of RF stages and ALC can be controlled and status
messages can be received remotely. In case a PSTN modem or a mobile is
connected, automatic alarm messages can be received.
The data transfer between the control module and the mother board is realized by
the I
2
C-Bus system.
The I
2
C-Bus concept was developed by Philips for the serial connection of integrated
circuits within one device. Two wires, serial data (SDA) and serial clock (SCL), carry
information between the devices connected to the bus. Each device is recognized by
a unique address and can operate either as transmitter or receiver.
All MRx03P configuration parameters are non-volatile stored in an EEPROM on the
control module if power supply failure occurs.
figure 2-5 Control module