Beam RST825 SatRADIO, User And Installation Manual

Page: 21 / 30

Page 21 of 30
Internal RS232 Port Signal Support and Handshaking
On the Data port, DCD and DSR output signals are related to DTR input and CTS is tied to
RTS as shown. The Data port supports full software XON/XOFF handshaking on data (AT
commands bypass this as standard for Hayes modems) or full hardware handshaking on
RTS/CTS with DCD carrier indication.
The Config port has no software handshaking support and hardware handshaking is loop-
back only since the command set requires a minimal buffer.
RS232 Port
Data Port Data Logging Port
DCD DCD = DTR
RXD RXD
TXD TXD
DTR DTR
DSR DSR = DTR
RTS RTS
CTS CTS = RTS
RI RF=HIGH
RS232 Port Electrical Parameters
The Data Port and Log Ports conform to the RS232 interface specification with the following
parameters, however the Log Port communicates only at 9600:
Parameter Specification
Communication Rate 220 to 115,200 Baud
Protocol 1 start bit, 8 data bits, no parity, 1 stop
bit, asynchronous.
Voltage Levels and
Sensitivity RS232 compliant