Scientific Atlanta PowerVu D9234, Инструкция по установке и эксплуатации

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This Appendix provides important information about your PowerVu Business Sat-
ellite Receiver. Refer to this section for:
‰ BSR Remote Control command details
Your Business Satellite Receiver is equipped for external remote operation and
control using serial Remote Control commands via a PC/workstation or data ter-
minal connection. This optional connection can be made at the receiver rear panel
serial data port labeled EXPANSION PORT (see “Connecting your system”). Re-
mote operating commands can be used in place of the user interface for remote
receiver setup and monitoring.
General information about how remote commands are used is followed by detailed
information about each command, including syntax and command options.
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Each of the serial Remote Control commands are executed using a unique protocol
or rules. These rules control command syntax (i.e., how a command must be sent to
the receiver) and how the receiver responds. Commands can only be interpreted by
the receiver if upper case characters are used. When sending commands, observe
the following.
‰ Use only upper case ASCII characters
‰ All serial Remote Control commands begin with the characters “SA1”
‰ A command is executed only after a carriage return character is sent (i.e., the Enter
or Return key is pressed)
The following conventions are used for identifying the serial Remote Control
command options found in this Appendix.
‰ Left and right parenthesis characters “{ }” and the forward slash character “/” are
used to separate the command option(s) from the main command characters, and
must not be entered
‰ The forward slash character “/” used to separate command options indicates that
one of the available options must be specified, and must not be entered
The following example shows correct command usage.
SA1VER<CR>
In the above example, the VER command causes the receiver model number to
display only after the Enter key is pressed (i.e., carriage return [<CR>]). The com-
mand is valid only if the characters “VER” are used (i.e., “VER” is not a valid
command, even though the characters are the same). If command or syntax is inva-
lid, the receiver responds with “?”. If an internal overflow condition exists when
executing a command, the receiver responds with “V”. Note that all serial Remote
Control commands begin with the characters “SA1”.
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A specific protocol is used for constructing and processing all Remote Control
command and resulting response messages. The accompanying table shows BSR
command frame and response frame information.
Table 12. BSR Command/Response frames
Command frame
Byte
Length Data Description
1 1 “S” Start character #1
2 1 “A” Start character #2
3 1 “1-9”
“
: ”
Unit Number (in chain)
1
Precedes next ASCII character (if more than 9 units in chain)
4 n Command code and parameters
4 + n 1 <CR> 2 End of message
Response frame
1 1 <LF>
3
Line Feed
2 n Command Response
2 + n 1 <CR> Carriage Return
3 + n 1 <LF> Line Feed
4 + n 1 “>” Ready for next message
1
Decoder is addressed when first unit (1) received
2
Carriage Return
3
Line Feed
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