Motorola VIP 1910 Installation Instructions And Manual page 30

Menu Settings, line three:
 STB settings
Various relatively important set-top box settings, usually performed only at the beginning:
Aspect Ratio
o
On the top, you select the actual type of your television set (the screen format) either
the classical square-like 4:3 or the wide rectangular-like 16:9.
Bellow it, you select customization of the picture if the program is broadcast in another
that the actual definition (e.g. if you have the 4:3 television set and the program (typically
a film) is broadcast as 16:9 and vice versa).
For the 4:3 television sets, your possibilities to customize the picture are as
follows:

None – the 16:9 picture will be distorted

Centre cut out – the picture is cut out on the sides and you will not see it complete,
the entire screen will be used

Letter box – the picture gets narrower, a black unused band will be seen at the top
and at the bottom of the screen, however, you will see a complete picture.
For the 16:9 television sets, your possibilities to customize the picture are as
follows:

None – the 4:3 picture will be distorted

Overscan - the picture is cut out at the top and at the bottom and you will not see it
complete, the entire screen will be used

Pillar box - the picture gets narrower, a black unused band will be seen on both the
sides of the screen, however, you will see a complete picture.
Similar setting may be performed directly on your television set as well.
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