RS232 RADIO MODEM
232C-868FR1
1.3.3 RS232 Connector
The RF Modem interfaces to the host computer via an RS232 connection using a standard DB9 connector as
shown in the diagram below.
PC Serial Port
DTE
(DB25)
RF Modem
DCE
(DB9F)
PC Serial Port
DTE
RF Modem
DCE
(DB9F)
(DB9)
8
3
1
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
Tx
2
3
4
5
6
7
8
9
Tx
2
Rx
Rx
20
7
DTR
DTR
GND
GND
6
RTS
CTS
4
RTS
CTS
5
22
1.4 Electrical Characteristics
Specification
Conditions
Min
Typical
Max
Units
Channel center frequency
Aggregate air data rate
Modulation type
-
869.850
10
MHz
-
kbps
-
FSK
-
Range
Line of sight
-
800
m
-
Conformity testing / Standard
Standby current consumption
ETSI 300 220
0.006
0.004
0.020 mA
Receiving
Sensitivity
CER <10-3
-101
dBm
Input signal -50
dBm
Average CER
<10-6
-
P1dB
CER <10-3
-10
1
dBm
-
Number of channels
Selectivity
-
At +/-150 kHz
36
dB
mA
Current consumption
30.0
27.0
33.0
33.0
33.0
Transmitting
Output power @ Vcc = 12 V
Number of channels
-
-
7
1
dBm
-
Current consumption
30.0
mA
1.5 Temperature Range and Dimensions
Storage Temperature:
Operating Temperature:
-40oC to +85o C.
-10oC to +55o C with full specification characteristics
-20oC to +85o C with performance deteriorated
Enclosure dimensions:
PCB dimensions:
110mm x 85mm x 35mm
99mm x 74mm
DS232-4 June ’04
©2004 Reg. No. 227 4001, ENGLAND
Page 4
RFSOLUTIONS [ RFSOLUTIONS.LTD ]
