Mocomtech CDM-570 - Manual (Page 12)

CDM570/570L Satellite Modem
Incorporate NMCS Protocol
MN/CDM570L.AA4
Page 8 of 54 MN/CDM570L.AA4
3.3.4 Instruction Code Qualifier
This is a single character that further qualifies the preceding instruction code.
Code Qualifiers obey the following rules:
3.3.4.1 Controller to Target
The only permitted values are:
= (ASCII code 61)
? (ASCII code 63)
= Code The = code (controller to target) is used as the assignment operator, and is
used to indicate that the parameter defined by the preceding byte should be
set to the value of the argument(s) which follow it.
For example, in a message from controller to target, TFQ=0950.0000 would
mean “set the transmit frequency to 950 MHz.”
? Code The ? code (controller to target) is used as the query operator, and is used to
indicate that the target should return the current value of the parameter
defined by the preceding byte.
For example, in a message from controller to target, TFQ? would mean
‘return the current value of the transmit frequency’.