Product specifications

CDD-562L/564 Demodulator with IP Module Revision 1
Appendix D MN/CDD564L.IOM
D–3
D.3.4 Command Structure
Controller-to-Target
Start of
Packet
Target
Address
Address
Delimiter
Instruction
Code
Row Index
(Optional)
Code
Qualifier
Optional
Arguments
End of Packet
<
ASCII code 60
(1 character)
1-4 characters /
ASCII code 47
(1 character)
(3 characters)
1-3 characters
contained with
‘[‘ ‘]’ brackets
= or ?
ASCII codes
61 or 63
(1 character)
(n characters)
Carriage Return
and Line Feed
ASCII codes 13
and 10
[0x0D, 0x0A]
(2 characters)
Examples: <0135/TFQ=1949.2345{CR}
<1/rte[1]= rt1|239.022.033.044.32|1|***************|0011|0|0|0|0|3
Target-to-Controller
Start of
Packet
Target
Address
Address
Delimiter
Instruction
Code
Code
Qualifier
Optional
Arguments
End of Packet
>
ASCII code 62
(1 character)
(4 characters)
/
ASCII code 47
(1 character)
(3 characters)
=, ?, !, *,#, or ~
ASCII codes
61,63,33,42, 35,
or 126
(1 character)
(From 0 to n
characters)
Carriage Return,
Line Feed
ASCII codes
13,10
(2 characters)
Examples: >0654/RSW=32{CR}{LF}
<RTE[4]?
>0001/rte[4]=rt4|239.022.033.044.32|1|***************|0011|0|0|0|0|3
D.3.4.1 Start of Packet
Controller-to-Target: This is the character '<' (ASCII code 60).
Target-to-Controller: This is the character '>' (ASCII code 62).
Because this is used to provide a reliable indication of the start of packet, these two characters
may not appear anywhere else within the body of the message. For multi line text message, each
line should end with a new line character ‘\n’. The carriage return & new line [\r\n] combination
should present only at the end of the message.
D.3.4.2 Target Address
Up to 9,999 devices can be uniquely addressed. Even though the any number of devices can be
addressed, but they all should be associated with single IP Address.
• For a CDM-570, address of ‘1’ is being used to address both modulator and
demodulator.
• For CDD-564, each demodulator is identified by unique address from 1 to 4
respectively for all the four demodulators.
The address is not significant for commands targeted system wide. But, it does has significance
when associated with demod specific commands like Frequency, data rate etc.