Comtech EF Data CSAT-6070 - Manual (Page 66)

50 Watt C-Band Transceiver Revision 0
Remote Control MN/CSAT607050.IOM
terminal equipment that requires RTS/CTS handshaking. The CSAT simply ties
these two signals together.
Table A-2. EIA-232 interface
Pin Signal Name I/O Notes
E EIA-232 RD Input CSAT Rx line
G EIA-232 TD Output CSAT Tx line
T Ground Passive
A.2 B
ASIC
P
ROTOCOL
Whether in
EIA-
232 or
EIA-
485 mode, all data is transmitted half-duplex as
asynchronous serial characters suitable for transmission and reception by a
UART. In this case, the asynchronous character format is fixed at; 8 data bits, 1
stop bit, no parity. The baud rate may vary between 1200 baud and 19,200 baud.
All data is transmitted in framed packets. The master is assumed to be a PC or
ASCII dumb terminal, which is controlling the process of monitor and control.
The master is the only device that is permitted to initiate the transmission of data.
Slaves are only permitted to transmit when they have been specifically instructed
to do so by the master.
All bytes within a packet are printable ASCII characters. In this context, the
Carriage Return and Line Feed characters are considered printable.
All messages from master to slave require a response (with one exception). This
will either be to return data that has been requested by the master, or to
acknowledge reception of an instruction to change the configuration of the slave.
The exception to this is when the master broadcasts a message (such as Set
time/date) using Address 0.
A-2