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Random access adjustment mode – Barco R9001190 User Manual

Page 27

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7-4

Random Access Adjustment Mode

5975398 BARCODATA 3200 110797

Select with or

to toggle

or to change value

to return

Sync
pulse

Clamp
pulse

Clamp
delay

Clamp
width

Example for clamp position [trailing]

EDIT FILE OPTIONS

Source number

1

Clamp position

[leading]

Clamp width

[1]

Field polarity inverted

[no]

Vertical refresh

[sync]

Vert. sync polarity

[leading]

CONFIRM
EDIT FILE

Save changes to file

xga.c30?

to confirm

to return

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 & synchronisation

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 width : The width of the clamp pulse [1 or 2]

[1] : narrow clamp pulse

[2] : wide clamp pulse

Field polarity inverted

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

[yes].

Use the ENTER key to toggle between [yes] and [no].

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
artefacts'. 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]

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.