Eclipse CD3200 Owner's Manual page 87

How to operate the tuner with an optional HD Radio tuner connected (U.S.A. only)
Press the [SELECT] (Up/Down)
5
button to select Auto or OFF.
In the [Auto] setting, the selection is
switched between digital and analog
reception automatically. In areas
where digital reception is not possible,
reception is automatically switched to
analog to avoid loss of reception.
While receiving the digital broadcast,
the "DIGITAL" message appears on
the display. This is cleared during
analog reception.
In the [OFF] setting, reception is
always analog.
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