User`s guide
DVDO iScan Mini - 4K Scaler / Video Enhancement
DVDO iScan Mini 29
be the native resolution of your display or your display may scale all input signals even if the input
resolution is already at native resolution.
Note: If this test pattern does not appear as it should and you have chosen the native resolution of your
display, you may not be able to bypass the internal processing on your display.
The ‘Vertical Lines’ test pattern should appear as one pixel wide black and white columns. If you see any
irregular pattern(s) in the image then you know that the display is scaling the signal horizontally.
If using a projector, the vertical lines will show distortion if any keystone is used. Keystone should be
avoided at all costs – instead, hang the projector in the correct position.
The ‘Horizontal Lines’ test pattern should appear as one pixel tall black and white rows. If you see any
irregular pattern(s) in the image then you know that the display is scaling the signal vertically.
Judder (Frame Rate)
The Frame Rate Conversion test pattern consists of a vertical bar which moves slowly back and forth
across the screen. The bar’s motion is updated once in each output frame period of the IScan Mini, and it
moves a fixed number of pixels horizontally in each frame period. This moving bar test pattern is intended
to identify the frame rates at which a display will operate. If the display is not performing any frame rate
conversion, i.e., it is actually displaying the output frame rate of the IScan Mini – the motion will be very
smooth. However, if the display is performing any type of frame rate conversion there will be very
noticeable stutter introduced in the smooth motion. There may also be other objectionable artifacts
introduced depending on how the display actually performs the conversion. These include tearing (top and
bottom portion of the bar are horizontally misaligned) and distortion.