AAC-3390
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Page 9 of 11
Revision 04
Selection of Internal or External Clock Reference:
For
fixed internal
clock reference
close
links LK6 and LK15 on the module main circuit board.
For a clock reference selectable between the internal clock and the external clock
open
links LK6 and LK15 on the
module main circuit board. In this mode of operation the AAC-3390 will lock to a external reference applied to the
external reference input selected by SW1 and SW2,
whenever this reference is present
and
revert to the internal
crystal clock reference if the external reference is removed.
NOTE
: It is important for the operation of the AAC-3390 that links LK6 and LK15 by
both
open or closed
together
never individually
.
