Packet Structure - Comtech EF Data HPOD Installation And Operation Manual

HPOD C-, X-, Ku-Band High-Power Outdoor Amplifier
Serial-Based Remote Product Management
All bytes within a packet are printable ASCII characters, less than ASCII code 127. In this context, the Carriage Return and Line Feed
characters are considered printable.
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. The exception to
this is when the Controller broadcasts a message (such as Set Time/Date) using Address 0, when the Target is set to EIA‐485 mode.

5.3.4 Packet Structure

Start of Packet
<
ASCII code 60
(1 character)
Packet Example:
Start of Packet
>
ASCII code 62
(1 character)
Packet Example:
Detailed description of the packet components follow.
Controller-to-Target (Issued Command or Query)
Target Address Address Delimiter
0000 (default) /
ASCII code 47
(4 characters) (1 character)
<0412/MUT=1[cr]
Target-to-Controller (Response to Command or Query)
Target Address Address Delimiter
/
ASCII code 47
(4 characters) (1 character)
>0412/MUT=1[cr][lf]
Instruction Code Code Qualifier
= or ?
ASCII codes 61 or 63
(3 characters) (1 character)
Instruction Code Code Qualifier
=, ?, !, or*
ASCII codes
61, 63, 33, or 42
(3 characters) (1 character)
5–5
Revision 6
MN/HPOD.IOM
Optional Arguments End of Packet
Carriage Return
ASCII code 13
(n characters) (1 character)
Optional Arguments End of Packet
Carriage Return
ASCII code 13 or 10
(0 to n characters) (2 characters)