Special Task 7: Send an ERF as Part of RXMT Operation
Some versions of the RT require the FCTN to be set to the FH-M
position in order to change the Net ID of any channel.
FH-M position is required for a Net ID change, it is important that the
FH-M back to FH upon task completion (except for NCS).
** Some versions of the SINCGARS radio will allow you to change only
the last two Net ID numbers.