Random access adjustment mode – Barco R9001769 User Manual

Page 31

8-4

Random Access Adjustment Mode

5976069 BARCOREALITY 6400 14032000

Select with or

to toggle

or to change value

to return

EDIT FILE OPTIONS

Source number

Clamp position

[leading]

Clamp delay

Clamp width

Field polarity

[pos]

Field select

[both]

Vertical refresh

[sync]

Vertical sync polarity

[leading]

Sync
pulse

Clamp
pulse

Clamp
delay

Clamp
width

lin

adi

g ed

xample for clamp position [trailing]

CONFIRM

EDIT FILE

Save changes to file

xga.c30?

to confirm

to return

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 Delay : The time between the leading edge of the clamp pulse and

the locked edge of the sync pulse.

Can be any value between 0 and 255. Change the value by pushing the

cursor key è or ç.

Clamp Width : The width of the clamp pulse

Can be any value between 0 and 255. Change the value by pushing the

cursor key è or ç.

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 [pos] and [neg].

Field Select : Default [both]

The field select is only used for interlaced images. One frame of an

interlaced image contains two fields, an even and an odd field. The choice

exists to project [both] fields on the screen or only the [even] or [odd] field.

This can be useful for 3D projection.

Use the ENTER key to toggle between [both], [even] and [odd].

Vertical Refresh [sync/async] : The way of updating the image informa-

tion on the LCD panels.

Not available for PAL-NTSC-SECAM sources. This option will be

displayed in gray.

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 the synchronous mode is default,

for all other sources below 60 Hz asynchronous 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.