Random Access Adjustment Mode
8-4
5975958 RETRO GRAPHICS 2100 210198
Read AMDS
AMDS = automatic mode detection & synchronization
During the installation of a file with LOAD, the system automatically
measured the horizontal period, the total vertical lines and the
interlaced mode.
When selecting Read AMDS, the system re-measures the above
indicated items.
when active file has to be edited. If the image is wrong due to mis-
measurement, use the ENTER key to toggle between [On] and [Off].
(for interlaced images, 1 frame contains 2 fields).
Options
Source number
:
The source number of a non-active source can
be changed to any other source number. This makes it possible to
create a file for future source numbers.
Clamp position
:
Clamping determines the black level of the signal.
The clamp pulse can be related to the leading or the trailing edge of
the sync pulse. Use the
ENTER
key to toggle between [leading] and
[trailing].
Clamp delay
:
The time between the leading edge of the clamp pulse
and the locked edge of the sync pulse.
This can be any value between 0 and 127. Change the value by
pressing the control disc to the left or to the right.
Clamp width
:
The width of the clamp pulse
This can be any value between 0 and 127. Change the value by
pressing the control disc to the left or to the right.
Field polarity
:
Default [auto]
[auto] = auto detection of the field polarity.
The field polarity function is used for interlaced images. Both rasters
of the image could be shifted in a wrong way (double lines are visible
in the image). This can be corrected by forcing the field polarity to
[neg] or [pos].
Use the
ENTER
key to toggle between [auto], [pos] and [neg].
Field select
:
This selection is
not applicable
and should not be used.
Vertical refresh [sync/async]
:
The way of updating the image
information on the LCD panels.
* For sources with a vertical frequency up to 60 Hz : the vertical
refresh rate is the same as the vertical frequency of the incoming
source. This is a necessity to project moving images without 'motion
artifacts'. For stationary images with a vertical frequency up to 60
Hz it is still possible to use asynchronous refresh. When loading
NTSC-files synchronous mode is default, for all other sources below
60 Hz asynchronous mode is default.
* For sources with a vertical frequency higher than 60 Hz : the vertical
refresh is different than the vertical frequency of the incoming
source. Synchronous refresh cannot be used.
Vertical sync polarity
:
[leading] or [trailing]
The vertical refresh can be synchronised with the leading sync edge
or trailing sync edge. Default on [leading].
Toggling to [trailing] is only necessary for special applications where
the trailing edge of the sync signal has to be taken as a reference.
Use the
ENTER
key to toggle between [leading] or [trailing.]
Frame Delay
:
[on] or [off]
Normally there is a 1 frame delay between the source and the
reproduction of the image on the LCD panel.
[on] : default position, 1 frame delay between source and LCD panel.
[off] : for minimum delay for simulation applications with specific
sources e.g. XGA on 60Hz.
Press
EXIT
to leave the Edit File Option menu.
A 'Confirm Edit File' menu will be displayed.
Press
ENTER
to confirm and to save the new settings or
EXIT
to return
without saving the new entered settings.
Select with or
<ENTER> , to change value
<EXIT> to return
EDIT FILE OPTIONS
Source number
1
Clamp position
[leading]
Clamp delay
0
Clamp width
10
Field polarity
[pos]
Field select
[both]
Vertical refresh
[sync]
Vert. sync polarity
[leading]
Frame Delay
[on]
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SXOVH
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GHOD\
&ODPS
SXOVH
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DL
OLQ
J
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OH
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Example for clamp position (trailing.)
CONFIRM
EDIT FILE
Save changes to file
xga.c30?
<ENTER> to confirm
<EXIT> to return
