This mode selects what displays are monitored in the
background besides the primary selected channel. You
can mix and match between all or partial channels to
allow dual, tri, and quad watch
Selected Memory + Displays (A, B, C, D)
M = Selected Memory
A = Display A
B = Display B
C = Display C
D = Display D
2.5, 5, 6.25, 10, 12.5, 25 kHz