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7.20 setsubchanlist command
The “setsubchanlist” command is to set sub channel list
There is an important distinction between the “setchanlist” and the “setsubchanlist”
which we will explain here. The “chanlist” can be programmed and read using the
“setchanlist” and “getchanlist” commands and these are the channels on which the
node is permitted to transmit. This list will be provided by the White Space
Database in countries such as the US, and in countries which do not use a
database it will be dependent on local regulatory rules or the license an operator
may have in place and must be programmed by the professional installer. For US
customers the software will not allow the user to manually program the channel list.
The “subchanlist” does not come from the database but is meant to further restrict
the channels which are used based on the hardware configuration. A situation
where the user may want to reduce the number of channels would be if a Combiner
or Narrow Band Filter is placed between the radio module and the antenna. For
example, if the passband of a filter covers Channels 14 to 22, the user would use
the following command”
Setsubchanlist 14 15 16 17 18 19 20 21 22
The software will then know that the node can only transmit on a channel between
14 and 22, inclusive.
