Digigram ALP221e User Manual page 19

User Manual – ALP221e
The ALP221e card can be configured as an internal clock
or external clock (AES3 input).
To select the clock source, click on the "Prioritized
source" selection list and select the desired source.
A red padlock icon on the right of the clock name means
the clock signal is absent. A green padlock icon on the
right of the clock name means the clock signal is
present.
In addition, the detected sample rate of an external
clock is displayed in the clock list.
If the internal clock is selected ("Internal"), select the
sampling Rate value from the "Internal Sampling Rate"
selection list.
Possible values are: (in kHz) 32, 44.1, 48, 64, 88.2, 96,
128, 176.4, 192, and Application.
Selecting "Application" means that the sampling
frequency is set by the application.
Setting the card to one of the frequency values means
that a software application that uses the card must be
configured at the same frequency value.
If an external clock is selected, the card is
synchronised to it as long as it is present.
If the external clock signal is lost, the ALP card falls back
to its internal clock, which is automatically set at the
same frequency as the external clock.
19