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Integrated L-Band Up/Dn Converter LT3600 CG-1309
Page 20
SECTION 4 Serial Command Set
4.0 GENERAL
The standard Up/Dn Converter is controlled via a rear panel serial link (RS-422/485)(Reconfigurable
to RS-232). With the front panel control, a user can operate the L-Band Up/Dn Converter from its
front panel as well as from the serial link. This section describes the format for the ASCII serial
control as well as front panel operation.
Note: Some commands and status strings have been changed as of Software Release v7.70 (main
board) and v5.20 (front panel). Units marked with “Rev A” on the rear panel support the new
protocol.
4.1 LT-3600 SERIAL INTERFACE
The serial interface format to the Up/Dn Converter for RS-422 is identical to the RS-485 format
except that under RS-485, the format includes an address field (aa in the format below).
4.2 COMMUNICATION PROTOCOL
Baud Rate: 9600
Parity: None
Data Bits: Eight
Start Bits: One
Stop Bits: One
4.2.1 General Data Format
{aaCND…}
Where:
{ = Start byte
aa = 2 character address (00 to 50, remote interface only)
C = 1 character, either C (Command) or S (Status)
N = 1 number 0 to 9, A,B,C Command or Status Number
D = 1 or more Data characters (depending on command)
} = Stop byte
Note: The address is only used in the RS-485 mode when having several addressable units
communicating with one station.