Instruction Code Qualifier; Controller-To-Target Rules; Target-To-Controller Rules - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710/L Broadcast Satellite Modem
Serial Interface Operation

9.3.5 Instruction Code Qualifier

This single character qualifies the preceding instruction code as a "command" or as a "query. " Instruction Code
Qualifiers obey specific rules.
9.3.5.1

Controller-to-Target Rules

From Controller-to-Target, the permitted qualifiers are = or ? (ASCII codes 61 or 63):
= (ASCII code 61)
The "=" qualifier is the Assignment Operator (AO). It means that the parameter defined by the preceding byte should
be set to the value of the argument(s) that follow it. For example: TFQ=0950. 0000 tells the Target to set its transmit
frequency to 950 MHz.
? (ASCII code 63)
The "?" qualifier is the Query Operator (QO). It means that the Target should return the value of the parameter(s)
defined by the preceding byte. For example: TFQ? asks the Target to report the value of the transmit frequency to the
Controller.
9.3.5.2

Target-to-Controller Rules

From Target-to-Controller, the symbols =, ?, !, *, #, or ^ (ASCII codes 61, 63, 33, 42, 35, or) are transmitted by the
Target device to the Controller:
9–6
MN/CDM710.IOM
Revision 12