Comtech EF Data LPOD-R PS .5 Installation And Operation Manual page 110

LPOD-R Outdoor Amplifier / Block Up Converter (BUC)
Optional Serial Interface Operation (PS 1, PS 1.5 ONLY)
1. If the Controller sends a command to set a parameter's value, and the value is valid, the Target accepts the command by
replying with no message arguments. For example: >0001/MUT={CR}{LF}
2. If the Controller sends a query to a Target, the Target responds with the configured setting. For example, the query MUT?
means "is Muting enabled or disabled?"); the Target responds with >0001/MUT=x{CR}{LF} (where 'x' represents the
configured state – '1' being 'enabled' and '0' being 'disabled').
? (ASCII code 63)
"?" displays when the Controller sends a command to set a parameter's value, and the value is not valid. The Target rejects the
message by echoing the valid instruction, followed by this character. For example: >0001/MUT=?{CR}{LF}
! (ASCII code 33)
"!" displays when the Controller sends an instruction code that the Target does not recognize. The Target rejects the message by
echoing the invalid instruction, followed by this character. For example: >0001/XYZ!{CR}{LF}
* (ASCII code 42)
"*" displays when the Controller sends a command to set a parameter's value, and the value is valid but the Target cannot permit
that parameter to be changed at that time. The Target rejects the command by echoing the prohibited instruction, followed by this
character with no message arguments. For example: >0001/MUT*{CR}{LF} (with message arguments).
# (ASCII code 35)
"#" displays only if the Controller sends an instruction code that the Target cannot currently perform due to hardware resource
issues – specifically, if you issue two or more 'hardware configuration' type commands without allowing adequate time, between
commands, for the hardware to be configured. If this happens, the Target rejects the instruction code and responds to the error by
echoing the invalid instruction, followed by the # character. For example, if you issue commands to change both the frequency
(FRQ=) and the attenuation (ATT=) with less than 100 milliseconds between the commands, and the Target responds with
>0001/ATT#{CR}{LF}, this means that the attenuation command was rejected and you must resend that command.
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MN-LPODR
Revision 3