CDM-570A/570AL Satellite Modem with Optional Packet Processor
Revision 5
Serial-based Remote Product Management 8–5 MN-CDM570A
1. From Controller-to-Target, the only permitted values are:
(ASCII Code 61)
The ‘=’ code is used as the Assignment Operator (AO). It establishes that the Instruction Code that precedes it is issued as a command
to assign or configure operation. The instruction set that follows serves to assign the Target’s new parameter setting or operational value.
For example: From Controller-to-Target, <0/IG1=aaa.bbb.ccc.ddd/yy means “set the ‘ETHERNET | TRAFFIC |GE’ port IP Address to
(ASCII Code 63)
The ‘?’ code is used as the Query Operator (QO). It establishes that the Instruction Code that precedes it is issued as a query that returns
the Target’s current configured parameter setting or operational value.
For example: From Controller-to-Target, <0/IG1? means “what is the current ‘ETHERNET | TRAFFIC |GE’ port IP Address?”
2. From Target-to-Controller, the only permitted values are:
(ASCII Code 61)
This code is used in two ways:
1. If the Controller sends a query to the Target.
For example: <0/TFQ? (meaning “what is the current value of the transmit frequency?”) – the Target responds with
>0000/TFQ=xxxx.xxxx, the value for that queried parameter.
2. If the Controller sends an instruction to set a parameter to a particular value, and the value sent is valid, the Target acknowledges
the message and responds with, for example, >0000/TFQ = (with no message arguments).
(ASCII Code 63)
If the Controller issues a command to set a parameter to a particular value, and the value sent is not valid, the Target then acknowledges
the message and responds with ‘?’. This indicates that there was an error in the message sent by the Controller.
For example: >0000/TFQ? (with no message arguments).
(ASCII Code 33)
If the Controller issues a command that the Target does not recognize, the Target responds by echoing the invalid instruction code,
followed by ‘!’.
(ASCII Code 42)
If the Controller issues a command to set a parameter to a particular value, and the value sent is valid, but the modem will not permit that
particular parameter to be changed at present, the Target responds by echoing the valid instruction code, followed by ‘*’.
For example: >0000/TFQ* (with message arguments)
(ASCII Code 35)
If the Controller sends a correctly formatted command, but the Target is not in Remote Mode, the unit does not allow reconfiguration and
responds by echoing the valid instruction code, followed by ‘#’.
For example: >0000/TFQ#
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