LinuxQuestions.org - Is it possible/needed to change the channel of wireless transmission?

Yes one can change the channel used on the wireless device, from man; man iwconfig

Code:

      freq/channel

              Set  the  operating  frequency or channel in the device. A value

              below 1000 indicates a channel number, a value greater than 1000

              is a frequency in Hz. You may append the suffix k, M or G to the

              value (for example, "2.46G" for  2.46  GHz  frequency),  or  add

              enough '0'.

              Channels  are  usually  numbered  starting at 1, and you may use

              iwlist(8) to get the total number of channels, list  the  avail-

              able  frequencies,  and display the current frequency as a chan-

              nel. Depending on regulations, some frequencies/channels may not

              be available.

              When  using  Managed  mode, most often the Access Point dictates

              the channel and the driver may refuse the setting  of  the  fre-

              quency.  In  Ad-Hoc mode, the frequency setting may only be used

              at initial cell creation, and may be  ignored  when  joining  an

              existing cell.

              You  may  also  use off or auto to let the card pick up the best

              channel (when supported).

              Examples :

                  iwconfig eth0 freq 2422000000

                  iwconfig eth0 freq 2.422G

                  iwconfig eth0 channel 3

FYI: it is a good idea to establish a connection the first time without any encryption in use. One can add encryption / security later.