ADDER AdderLink X-DVI Manual - Page 8

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Video image compensation

The X-DVI modules use a special two-part compensation technique to overcome

the effects of long cable lengths upon the digital video signal. Under your

control, the local and remote modules apply their own adjustments to the video

signal. The local module applies Pre-emphasis to the video signal while the

remote module uses Equalisation to return the signal to levels suitable for use at

the connected DVI monitor.

Using the keyboard connected to the remote module, you can choose from

eight different video compensation settings (each setting affects both the local

and remote modules) to achieve the best results. In certain cases there may be

no image at the remote monitor until the appropriate compensation setting is

chosen.

Note: The effects of video compensation will only be noticeable on longer link

cables lengths and/or higher video resolutions.

To adjust the video image

1 Connect the X-DVI modules to the computer and peripherals as discussed

earlier in this chapter. Power on the remote module and switch on the

computer.

2 On the keyboard connected to the remote module, simultaneously press the

and

keys to enter Configuration mode - the three indicators

(Num Lock, Caps Lock and Scroll Lock) on the keyboard should flash slowly

in sequence.

3 Press the

key to begin Compensation - the Scroll Lock indicator on the

keyboard should flash.

4 Press the

key to select the first compensation setting. Allow a few

seconds to elapse in order to give time for the compensation mode to

change and the video monitor time to adjust itself to the new signal.

Note: In some cases the video image may disappear completely as the video

monitor fails to decipher the signal. If this occurs, continue to follow these

instructions until the best compensation setting is achieved.

5 If necessary, repeat step 4 using keys

seconds after each press to allow the modules and video monitor to react.

6 When the best video image compensation is achieved, press the

save the settings and return to the normal Configuration mode. The three

indicators on the keyboard should once again flash slowly in sequence.

7 Press the

key again to exit from the Configuration mode.

, remembering to allow a few

key to