Panasonic PT-L780E - Manual (Page 21)

E NGLISH -41
Basic
Operation
40-E NGLISH
S4:3
The size of the input signal is
compressed to 75% and projected.
(This is useful for projecting a
picture with a 4:3 aspect ratio onto a
16:9 screen.)
When a 4:3
signal is being
input
[
AUTO
(S-VIDEO only)
When an S1 video signal is input to
the S-VIDEO terminal, the aspect
ratio is changed automatically to
project a 16:9 picture.
4:3
The input signal is projected without
change.
16:9
The picture is compressed to a ratio
of 16:9 and projected.
When a
squeezed
signal is being
input. (The
projected
image is
contracted
vertically)
[
quality will deteriorate, and the harder it
will become to achieve a good level of
focus. To obtain the best picture quality,
set up the projector and screen in such
a way that the amount of keystone
correction required is as minimal as
possible.
B The picture size will also change
when correction of keystone
distortion is carried out.
B The range of keystone correction
varies depending on the type of
signal being input. If you make an
adjustment that is outside the
allowable range, the setting will not
be changed. In addition, if the input
signal changes after keystone
correction has been carried out, the
correction setting may be cancelled.
This indicates that the current
correction setting exceeds the
allowable range for the new input
signal.
B If you correct both vertical and
horizontal keystone distortion at the
same time, the allowable range of
keystone correction becomes
smaller. If you make an adjustment
that is outside the allowable range,
the setting will not be changed.
OSD POSITION
Press the I or H buttons to move
the OSD position.
ASPECT
This setting is only valid for an S-
VIDEO/VIDEO signal and a YP
B P R
signal in 525i (480i), 525p (480p)
and 625i format.
AUTO
4:3
16:9
S4:3
NOTE:
B If you press the AUTO SETUP button
after correcting the keystone distortion
manually, the automatic keystone
correction function will operate and the
corrected picture will return to its
previous incorrect condition. In addition,
if you change the input signal and press
the AUTO SETUP button, the keystone
correction may be cancelled depending
on the type of signal and the angle of tilt
of the projector. To prevent them from
happening, you can set “AUTO
KEYSTONE” in the OPTION menu
to “OFF”
B The greater the correction of keystone
distortion amount, the more the picture
Picture
condition
Operation
Press the F F
button.
Press the G G
button.
Press the I I
button.
Press the H H
button.
POSITION
Moves the picture position.
Press the I or H buttons to move the
picture horizontally.
Press the F or G buttons to move the
picture vertically.
DOT CLOCK
(RGB only)
Periodic striped pattern interference
(noise) may occur when a striped
pattern such as the one below is
projected. If this happens, use the
I and H buttons to adjust so that
any such noise is minimised.
CLOCK PHASE
(RGB only)
Adjust the DOT CLOCK setting first
before carrying out this adjustment.
Use the I and H buttons to adjust so
that the noise level is least noticeable.
NOTE:
B If signals with a dot clock frequency
of 140 MHz or higher are being input,
interference may not be completely
eliminated when the DOT CLOCK
and CLOCK PHASE adjustments are
carried out.
KEYSTONE
Before carrying out keystone correction,
1) adjust the forward/back angle of tilt of
the projector by pressing the adjuster
buttons and 2) press the AUTO SETUP
buttons to correct vertical keystone
distortion. (pages 28 and 29)
The vertical keystone distortion will
be automatically corrected by the
projector's automatic setup function
KEYSTONE
H:
V:
0
0
POSITION
H:
V:
128
32
when using the standard lens.
However the horizontal distortion or
adjustment of the tilted screen needs
to be corrected manually by following
any of the procedures below.