VST
X
User Manual
Revision
2.
3
44
5.6
Using alternate/custom controllers
The implementation of an RS-232
command set, or Remote Protocol, allows the use of customized
interfaces to perform virtually all unit operations, including:
Configure Settings
Query Status
The Remote Protocol consists of command and response messages, or packets. The internal CPU
handles interpretation of the packets to set unit parameters, and provide responses back through the
serial interface.
In addition to IMT’s Nano Controller, alternate control interfaces may be developed, or available from
third parties. Additionally, commands and responses may be entered and viewed manually using a
command terminal.
The Remote Protocol is available upon request from IMT.
5.6.1
Serial Interface Rate, Parity, and Stop Bit Specifications
Refer to the Remote Protocol for information about the baud rate, number of data bits, stop bits, and
flow control methods.
5.6.2
Command and Response Packet Formats
This section provides a brief introduction to the serial interface command and response packet formats.
The command packets use the following format:
NU <tt> <ss><##><cc><dd><CS><CR><LF>
Where the fields are ASCII and are defined as follows:
NU
Literal
<tt>
Address of target (0x01 – 0xFF)
<ss>
Address of source (0x00 – 0xFF)
<##>
Packet Length (Packet Length = Command Data Length)
<cc>
Command (0x00-0xFF) – Different values are used for each command.
<dd>
Data (Hex Format) – Data values are encoded with a variety of meanings.
<CS>
(1’s complement of <tt> to end of data)
<CR>
Carriage Return
<LF>
Line Feed
After a command packet is received, the unit returns a response packet. Response packets have the
same basic format as command packets, except that the source and destination are reversed, and the
command field specifies the type of response being sent.
Summary of Contents for VSTx
Page 1: ...VSTX HD SD COFDM Transmitter User Manual IMT PUBLICATION M22 0002 00A REV 2 3...
Page 12: ...VSTX User Manual Revision 2 3 12...
Page 13: ...VSTX User Manual Revision 2 3 13 Chapter One 1 Introduction...
Page 15: ...VSTX User Manual Revision 2 3 15 Chapter Two 2 Description...
Page 22: ...VSTX User Manual Revision 2 3 22...
Page 23: ...VSTX User Manual Revision 2 3 23 Chapter Three 3 Specifications...
Page 27: ...VSTX User Manual Revision 2 3 27 Chapter Four 4 Installation...
Page 37: ...VSTX User Manual Revision 2 3 37 Chapter Five 5 Operation...
Page 46: ...VSTX User Manual Revision 2 3 46...
