MNC-0500-038
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Revision 2
Amplifier Communication and Protocol, XTRT, Touchscreen TWTA
Protocol
Message Format
Commands, Queries, and Responses are formatted as follows:
•
Messages are delineated using start and stop characters, followed
by a check byte.
•
The address byte allows a master device to selectively
communicate with individual devices that are sharing an RS-485
bus.
•
Each message has a mandatory message byte, followed by a
variable number of parameters. Some messages have no
parameters, while others can have many. the variable length
parameter field is also used to hold message responses.
•
For Ethernet only. Each message must be terminated with a
carriage return character (CR) or carriage return line feed
character pair (CRLF).
RS-485
Using RS-485, a master device can maintain status and control of
multiple devices, which share send/receive lines. Slaves may transmit
only in response to a command or query from the master. Each device is
assigned a unique address between ‘A’ and ‘Z’ to differentiate it from other
devices.
RS-485 device addresses are selected on rack HPAs using the front
panel interface. They are selected on digital outdoor HPAs using Xicom’s
“HPA Control” utility.
Note
If a device is not responding to your messages, check the
RS-485 device address.
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to the U.S. Export Administration Regulations (EAR). Transfer of data herein by any means to a Foreign Person,
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