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Instruction
Manual
26
Using the Advanced Video Tuning feature
The
Advanced Video Tuning
menu allows you to adjust the qualities of the video in your
VNC sessions, and can be accessed by clicking the
Advanced
button on the
Video
Tuning
VNC menu. While many users will probably allow the SVxx41HDIE to
automatically configure the video properties, you can use this menu to exercise a great
deal of control over the settings if you wish.
The
Presets
section contains up to sixteen different settings, plus the factory setting. If a
number is highlighted, then that preset has been programmed with valid settings and
may be used. Note that the
Factory
preset is always available. Simply click on the
appropriate button and those settings will be restored.
To save settings to a preset, click on the
Save->Preset
button in the
Actions
pane. The
preset buttons will highlight. Click the desired preset button to save the values. Note that
any previous settings assigned to that button will be lost. If you do not wish to save the
presets after clicking the
Save->Preset
button, click the
Save->Preset
button a second
time and the save function will be canceled.
The section of the screen marked
Current Values
indicates the various video
parameters that can be adjusted. For each parameter, there are a series of buttons:
[, <<,
-, Auto, +, >, ]
. The ’
[’
and
’]
’ buttons set the parameter to its smallest or largest values,
respectively. The ’
<<
’ and ’
>>
’ buttons decrease or increase the parameter by a large
amount. In the case of phase, this is 4 units. For all the others, this is 10 units. The ’-’ and
’+’ buttons decrease or increase the parameter by one unit. The middle button sets the
parameter to the middle value. The text of the middle button also indicates which
parameter is being controlled. Note that in the case of phase, the middle button invokes
the auto-phase algorithm.
The
Performance
section of the screen gives an indication of the quality of the video.
Changes/frame
is the average number of tiles that change for each frame sampled by
the hardware.
Flatness
is an indication of what percentage of the screen contains tiles
that are comprised of only one color.
The
Regrab Screen
button in the
Actions
section causes the screen to be re-captured.
When making small changes to the video parameters, sometimes these changes are not
reflected in the displayed screen immediately, particularly if the noise filter is enabled.
Press this button to see the immediate effect of the changes.
Use the
Show Diffs
button to learn which parts of the screen are being sent over the
Internet. When you click this button, the screen is cleared to a medium grey color. All
blocks that are sent from that point on will show up on the screen as they are sent. Click
the button again to reset the screen to grey. To return to normal operation, click the
Regrab
button. It is very easy to visually identify the effect noise has on signal
processing, using this feature.
The
Auto Offset & Gain
button in the
Actions
section invokes the automatic algorithm
for setting the video parameters. The algorithm requires the factory calibration test
pattern to be correctly displayed on the screen.