Calibre UK VANTAGE-HD Home Theater System User Manual


 
Issue 1.0.2 28 March 2006 © Calibre UK Ltd Page 7 of 30
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Device Setup
When connecting your display via the SVGA (RGBHV) connector it is imperative
that the pixel clock and phase settings are correctly adjusted on the menu
system of your display device. For information on how to access these features
see the user manual supplied with your display device. Note: You must set
Vantage-HD to the native resolution of your display device BEFORE adjusting
the pixel clock and phase settings on your display.
To set the pixel clock, with no input displayed on Vantage-HD but with the OSD
present and the blue background shown, adjust the pixel clock setting (on your
display device, not on Vantage-HD) to remove all vertical noise bands from the
blue background. Correct adjustment will cause the vertical bands to move
further apart and reduce in number until they eventually disappear. Many good
displays will automatically select the correct pixel clock setting, but some will not.
IMPORTANT: See Chapter 10 - Output Mode Details for detailed information on
output mode timings including information on the correct pixel clock setting - the
total number of pixel clocks per line. See also Note (b) below when using
1366x768/1360x768 modes.
To set the pixel phase, first set the pixel clock correctly (see above) and
then adjust the pixel phase to remove all horizontal jitter and noise from
the background and the OSD, in particular you should adjust for best
sharpness of the OSD text and graphics.
PIXEL CLOCK AND PHASE ADJUSTMENTS WITHIN THE DISPLAY
DEVICE ARE NOT APPLICABLE WHEN USING A DVI OR HDMI DISPLAY
DEVICE.
Notes: a) Some 1024x1024 plasmas do not correctly support 1024x1024 native
resolution, in this case you must unfortunately select 1024x768 or 1280x768,
experiment to see which gives best performance.
b) There are two 1366x768 modes and a 1360x768 mode provided. This is
because some types of plasma and LCD with this resolution need
different signal timings compared with those which are considered
standard for this format. As a general rule, 1366x768 modes will give
better performance than 1360x768 but some displays do not support
1366x768 modes. The key difference between the two 1366x768 modes
is the length of line blanking. Pick the 1366x768 mode which allows you
to correctly set the pixel clock on your display device and which does not
cause bad clamping. (If the picture appears very dark or very bright then
it is incorrectly clamped due to the selected mode not being compatible
with your display - try the other 1366x768 mode or the 1360x768 mode
instead).
c) 852x480 mode may need to be used for plasma screens with resolutions
of 852 or 853 pixels. Many 853 pixel plasma displays do not actually
support incoming modes with an odd number of input pixels.
d) Never pick a mode with more display lines than the native format of your
display device, selecting a higher resolution mode will not increase the
system performance, it will instead degrade the picture significantly since
it will cause the internal scaler within your display to downsize the picture
resulting in loss of detail and artifacts.
Depending on the frame rate mode you choose, Vantage-HD may have to re-
boot to change resolution. If this occurs you need to re-enter the Output menu
by pressing Menu, scrolling to Output Menu with the up/down keys and entering
the Output Menu with the right key.