Addressess; Physical Address; Virtual Address; Message Structure - Comtech EF Data KPA-020IN Installation And Operation Manual

Ku-Band Solid-State Power Amplifier
Remote Control
6.7

Addressess

All KPAs are addressed in a command by the Device Address. The Device Address
consists of a physical address or a physical address plus a virtual address.
6.7.1

Physical Address

Each KPA in the system must have a unique physical address regardless of the access
method used. The physical address consists of a string of 1, 2 or 3 numbers from 1 to
256. The physical address is entered into a KPA via the front panel. For Direct Access,
the physical address is the only address required to command a KPA. A backup KPA or a
stand-alone KPA can only be accessed with a physical address.
For Example:
6.7.2

Virtual Address

In order to access an KPA controlled by a backup KPA indirectly, a virtual address is
required. A virtual address is appended to the physical address of the backup KPA with a
"V". The virtual address is either the number "1" or "2" corresponding to the KPA's
designation in a redundant subsystem.
For Example:
6.7.3

Message Structure

The structure of either a Command, Response, or Error Message is as follows:
6.7.4

Start Character

The Start Character begins each message:
10
10V2
•
Start Character
•
Device Address
•
Command or Response
•
End of Message String
For Example: <
>
Addresses KPA whose physical address is 10.
Addresses second KPA in a 1:2
redundant subsystem controlled by
the backup KPA whose physical address is 10.
Start of a user Command.
Start of a KPA response.
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MN/KPA.IOM