Sim2 Multimedia HT 250 - Manual (Page 10)

HT 200/250
12
Fig. 28
Some manufacturers offer screen-masking systems to
help frame the projected image and improve picture
contrast. This can be controlled by the second 12V output
on the projector
(Fig. 28) .
The screen-masking interface can be connected to output
, at the rear of the projector, or on the optional Remo-
te Input Interface.
- Rear projection: the screen must be translucent.
- Front projection: preferably, use a screen with black,
non-reflecting borders, which will perfectly frame the
projected image.
Avoid light shining directly on the screen during projection
as this will reduce contrast and black level detail on the
projected image. For the true cinema experience best
results are achieved with little or no ambient light.
Furniture and other objects with reflecting surfaces, as
well as light coloured walls should be avoided, as they
are likely to interfere with the screen’s characteristics.
We recommend the use of screens with low gain
specifications (i.e. 1.3 to 2). The use of high gain screens
should be avoided due to their limited viewing angle, which
is undesirable for a large audience.
Fig. 29
8 LED: DESCRIPTION AND
SWITCHING ON
ƽ
Position I : ON
Position O : OFF
Power switch
Fused power socket
Power plug
Fig. 30
Upon switch on (in position I) the projector will initialise,
indicated by the flashing red LED. Followed by stand-by
mode (red LED static) (
Fig. 31 ).
Fig. 31
CAUTION: Connect the projector to a power
supply with a nominal voltage within the
following values: 100-240 Vac, 50/60 Hz. It
must be earthed (Fig. 30).
Do not install - or operate - the projector on its
side: this position will dramatically shortens
the life of the lamp (Fig. 29).