Black Box ServSwitchTM When the screen contains only host system information, Phase, Contrast

Video Settings

This dialog provides access to all of the key video settings that determine image quality and link performance.

Note: Calibration is not required for digital video sources.

Using automatic configurations

• Every setting can be individually subjected to an automatic configuration

(click the appropriate ‘Auto’ button) and most can also be manually

adjusted.

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Phase

The phase setting adjusts the alignment of the host video output and the remote system video display to achieve the sharpest image.

Horizontal position Determines the horizontal position of the host screen image within the viewer window.

Threshold

The threshold is effectively a noise filter that differentiates between valid video signals and background noise or interference. This has the effect of reducing unnecessary video signals between the Wizard IP Plus and the remote system, thus improving performance.

• Use the ‘Calibrate All’ button to automatically determine the optimum

settings for all items.

Note: Before using the ‘Calibrate All’ option, if possible, remove on-screen

display (OSD) elements generated by any connected KVM switches (such as

a host name label or menu). These OSD elements use different video rates

to those of the host system(s) and can affect the setting of the automatic

threshold value. Wizard IP Plus uses an improved calculation procedure to

filter out the effect of these elements. However, best results are obtained

when the screen contains only host system information.

Note: To maximise performance, the threshold level is automatically

increased by 50% when a slow link is detected.

Note: When the Wizard IP Plus is used with one or more CATx switches,

the threshold needs to be higher than 32 due to the significant amounts

of ‘noise’ that these switches introduce. The Wizard IP Plus configuration

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Vertical position	Colour, brightness &	Calibrate all	Display activity
Determines the	contrast	Click to determine	Indicates the level
vertical position	Provides an automatic	the optimum	of video activity
of the host screen	setting button to	settings for	currently in
image within the	optimise these three	all aspects of	progress.
viewer window.	important video	video the video
	constituents for the	connection from
	current host and	the host system.
	connection speed.	Note: Calibration
		is not required
		for digital video
		sources.

should detect such noise and adjust the threshold accordingly.

Setting the Threshold manually

Occasionally it can be useful to manually adjust the Threshold setting, in order to achieve a setting that best suits your particular requirements.

1Use the ‘Calibrate All’ function to ensure that all other settings are optimised.

2Click the Threshold left arrow button to decrement the setting by one and observe the ‘Display Activity’ indicator.

3Repeat step 2 until the Display Activity indicator suddenly rises to a much higher level (i.e. 50%). This will mean that you have reached the noise boundary. At this point, increment the Threshold value by 2 or 3 points to achieve an optimum setting.

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