5.2 Power
Connection
PIN 1 = POSITIVE 12V
PIN 5 = NEGATIVE 0V
5.3 Factory
Setting
The radio modem is supplied with the following settings
Baud
Rate
9600
Parity
OFF
Repeater
mode
OFF
Error
Correction
OFF
Address
Mode
OFF
Transmitter
Address
0
0
Receiver Address
0 0
Transmitter
Test
Mode
OFF
Transmission
speed
SLOW
(5K
bits/sec)
RF
Frequency
(UK)
458.925MHz
RF
Power
500mW
5.4
Plug and Play
Connect three wires to the RS232 serial port of the host terminal (0V, TD and RD) as
described above. Connect a regulated 12V, 1Amp power supply to the radio modem.
X7202 PC to Modem cables can be used along with a X7201 power supply.
Configure a PC in Microsoft Windows Terminal, Data Talk or any other terminal package
with the following settings:
9600
Baud
No
Parity
1 Stop Bit
Local
Echo
XON/XOFF to OFF
RTS/CTS to OFF (no handshaking)
Connect up a second modem in the same way.
Pressing a key on one PC will transmit the character to the other. Refer to the Section 8.0
Trouble Shooting if this does not happen.
If a second PC is not available simply power up the second modem. Configure the modem
connected to the PC in the repeater mode with the address mode switched off. This will
command the distant modem to repeat back the characters sent to it.
Fig 1 shows how an open network using the above configuration would work. All the data
transmitted from one modem will be received by all of the others. This is similar to an
RS485 network but instead of connecting the equipment by wire a radio modem is used.
