Random Access Adjustment Mode
8-4
5975187 BARCOGRAPHICS 2100 180898
the projected image. This value is normally given in the specification of
the source. If not, adjust until full image height is displayed (no missing
lines)
Vertical start
: number of lines between the start of the input signal and
start of the image on the screen.
Interlaced [On] or [Off]
: this selection is automatically filled when active
file has to be edited. If the image is wrong due to mismeasurement, use
the ENTER key to toggle between [On] and [Off]. (for interlaced images,
1 frame contains 2 fields).
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 remeasures the above indicated
items.
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 pushing
the control stick 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 pushing
the control stick to the left or to the right.
Field polarity
: Default [auto]
[auto] = autodetection 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 visilble 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].
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 Pal, Secam, NTSC-files
syncronous mode is default, for all other sources below 60 Hz asyncronous
mode is default.
* For sources with a vertical frequency higher that 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 Dealy:
[on] or [off]
Normally there is a 1 frame delay between the source and the reproduc-
tion of the image on the LCD panel.
[on]: default position, 1 frame delay between source and LCD panel
[on]: for minimum delay for simulation applications with specific sources
e.g. XGA on 60 Hz
Select with
é
or
ê
<ENTER> to toggle
ç
or
è
to change value
<EXIT> to return
EDIT FILE OPTIONS
Source number
1
Clamp position
[leading]
Clamp delay
0
Clamp width
10
Field polarity
[pos]
Vertical refresh
[sync]
Vert. sync polarity
[leading]
Frame Delay
[on]
Sync
pulse
Clamp
pulse
Clamp pulse
delay
Clamp
pulse
width
tr
aili
ng ed
ge
lead
ing e
dge
Example for clamp position [trailing]
