Comtech EF Data XPA-200 - Manual (Page 58)

XPA200-7984-I-OPT1, X-Band SSPA Remote Control Remote Control
XPA200-7984-I-OPT1, Rev.2 5-6
5.7 Message Structure
The structure of either a Command , Response or Error
Message is as follows:
Start Character
Device Address
Command or Response
End of Message String
5.7.1 Start Character
The Start Character begins each message:
Example: < Start of a user Command.
> Start of a SSPA response.
5.7.2 Device Address
The Device Address consists of a Physical Address. For this
document DEV is used for the generic case examples.
Example: <10 direct addressing
5.7.3 Command
A Command is a variable length character string beginning
with a / and containing either an instruction or an instruction
and data for a SSPA to act upon. If data is passed by command it
is appended to the instruction by an underscore( _ ). If data is
retrieved by command underscore follows the instruction flagging
the SSPA to supply data in a response. In this document /COM is
used for the generic case examples.
Example: <DEV/COM_xxx'cr' Sends data to a SSPA.
Example: <DEV/COM_'cr' Requests information from
a SSPA.
5.7.4 Confirmation Response
A confirmation will change the start character, and echo the
Device Address and Command. Any requested data will be appended