Comtech EF Data LPOD-R PS .5, Инструкция по установке и эксплуатации

Страница: 108 / 152

LPOD-R Outdoor Amplifier / Block Up Converter (BUC) MN-LPODR
Optional Serial Interface Operation (PS 1, PS 1.5 ONLY) Revision 3
5–4
All messages from controller to target require a response (with one exception). This will be either to return data that has been
requested by the controller, or to acknowledge reception of an instruction to change the configuration of the target.
5.3.2 Packet Structure
Controller-to-Target
Start of Packet Target Address Address Delimiter Instruction Code Code Qualifier Optional Arguments End of Packet
<
ASCII code 60
(1 character)
0-9
ASCII codes 48-57
(4 characters)
/
ASCII code 47
(1 character)
A-Z, a-z
ASCII codes 65-90,
97-122
(3 characters)
= or ?
ASCII codes
61 or 63
(1 character) (n characters)
Carriage Return {CR}
ASCII code 13
(1 character)
Example: <0123/MUT=1{CR}
Target-to-Controller
Start of Packet Target Address Address Delimiter Instruction Code Code Qualifier Optional Arguments End of Packet
>
ASCII code 62
(1 character)
0-9
ASCII codes 48-57
(4 characters)
/
ASCII code 47
(1 character)
A-Z, a-z
ASCII codes 65-90,
97-122
(3 characters)
=, ?, !,
or
*
ASCII codes
61,63,33, or 42
(1 character)
(From 0 to n
characters)
Carriage Return {CR},
Line Feed {LF}
ASCII codes 13,10
(2 characters)
Example: >0123/MUT=1{CR}{LF}
5.3.2.1 Start of Packet
These characters are used to provide a reliable indication of the start of packet. They must not appear anywhere else in the body of
the message:
•
Controller-to-Target: < (ASCII code 60)
•
Target-to-Controller: > (ASCII code 62)
5.3.2.2 Target Address
The Controller sends a packet with the address of a Target – the destination of the packet. When the Target responds,
the address used is the same address, to indicate to the Controller the source of the packet. The Controller does not
have its own address.