Comtech EF Data HPOD - Manual (Page 77)

HPOD C-, X-, Ku-Band High-Power Outdoor Amplifier MN/HPOD.IOM
Serial-Based Remote Product Management Revision 8
5–7
Character Definition
=
(ASCII code 61)
This character is used as the Assignment Operator (AO). It establishes that the Instruction Code that precedes it is to be used 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. Example: From Controller-to-Target, MUT=1 means “enable the mute function.”
?
(ASCII code 63)
This character is used as the Query Operator (QO). It establishes that the Instruction Code that precedes it is to be used as a query
that returns the Target’s current configured parameter setting or operational value. Example: From Controller-to-Target, MUT?
means “what’s the current state of the MUTE function?”
2) From Target-to-Controller, the only permitted characters are:
Character Definition
=
(ASCII code 61)
This character is used in two ways:
a. If the Controller sends a query to the Target – for example: MUT? meaning “what’s the current state of the MUTE function?”, the
Target would respond with MUT=x, where x represents the state in question: 1 being enabled, and 0 being disabled.
b. 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 MUT= (with no message arguments).
?
(ASCII code 63)
If the Controller sends an instruction to set a parameter to a particular value, and the value sent is not valid, the Target then
acknowledges the message and responds with, for example, MUT? (with no message arguments). This indicates that there was an
error in the message sent by the Controller.
!
(ASCII code 33)
If the Controller sends an instruction code that the Target does not recognize, the Target responds by echoing the invalid instruction,
followed by ! Example: XYZ!
*
(ASCII code 42)
If the Controller sends the command to set a parameter to a particular value, and the value sent is valid BUT the router will not permit
that particular parameter to be changed at present, the Target acknowledges the message and responds with, for example, MUT* (with
message arguments).
#
(ASCII code 35)
If the Controller sends an instruction code which the Target cannot currently perform because of hardware resource issues, then the
Target will acknowledge the message by echoing the invalid instruction, followed by the # character. This response can only occur if the
operator sends two or more ‘hardware configuration’ type commands without allowing adequate time between commands for the
hardware to be configured. For example, if the operator issued commands to change both the frequency and the attenuation with less
than 100 milliseconds between commands, and if this response is returned, then the command has not been accepted and the operator
must resend the command.