Comtech EF Data KPA-020IN, Installation And Operation Manual

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Ku-Band Solid-State Power Amplifier Revision 0
Remote Control MN/KPA.IOM
6-4
6.5 Protocol
Refer to Table 6-1 for protocol description. Protocol is divided into six subjects:
•
Transmission Mode
•
Baud Rate
•
Format
•
Character Set
•
Response Timeout
•
Bus Inactivity Requirements
Table 6-1. Protocol Description
Transmission Mode The transmission mode is half-duplex implemented in
Command/Response convention. This method requires the external
system monitor and control unit to initiate all communications by
command and the KPA to respond with either confirmation or an error
message. The confirmation may contain status information.
Baud Rate
The default serial port Baud Rate is 9600.
Baud rates of 4800, 2400, 1200, and 300 also are supported.
Character Set The character set implemented is ASCII.
Response Timeout A minimum of 500 milliseconds should be provided before declaring a
No Reponse instance, at which time the command should be
re-transmitted.
Bus Inactivity
Requirement Comtech EF Data recommends that a minimum of 50 milliseconds bus
inactivity be provided by the user between the receipt of a response
from an addressed KPA and issuing the next command on the serial
bus.
6.5.1 Format
The following parameters are the default character format:
Start Bit 1
Parity Bit 1 (Selectable, Even or Odd, via the front panel menu or remote interface
Stop Bits 2
Data Bits 7
An optional character format that can be selected is:
Note: This can only be selected from the Front Panel Menu.
Parity Bit 0
Start Bit 1
Stop Bit 1
Data Bits 8