THOR-SSM
Rev. : 02/09/2012
105
8. Troubleshooting
Monitor
There isn’t a picture.
Check the power supply connection at the Local and Remote Unit. Is the
Power
LED at the Local and Remote Unit illuminated? If not, the internal power supply
may be damaged or there may be an internal error.
Check that the cable is connected from the Local Unit to the Remote Unit. Is the
Link Status
LED illuminated? If not, there may be a problem with the cable:
Are there e
rrors through data transmission over CATx- cable (cable too long, too
high attenuation or too much EMI interference)? Is the
Data Error
LED illuminated
or blinking? If yes, check cable length and environment.
Video Okay
LED is dark: CPU does not provide a video signal – Check settings of
the graphics card. Try connecting a monitor to the local output to see whether or not
there is a signal.
‘Stepping’ pictures on displaying movies
With higher resolutions, the amount of data transmitted each second reduces the
capability of the data link. Therefore, the data has to be reduced before transmitting.
This is done by a so called RLE (=Run Length Encoding) algorithm. If this (loss
less) compression does not reach the required amount, frames are dropped: The
frame actually transmitted is transmitted completely even if the graphic card
generates a new frame. This new frame is discarded. Because of this behavior, the
count of frames per second (fps) may be reduced to a value where ‘stepping’
pictures are seen.
How to solve the problem: Please use a lower resolution, which is slightly higher
than the resolution of the recorded movie. Note that most (actual) movies do have
only a low resolution of approx. 640x480 (NTSC) or 640x512 (PAL) or even
320x256 (VHS). If the monitor provides a higher resolution, it may provide the
scaling of the pictures. The picture quality is the same if the monitor or the CPU
does the scaling.
How to solve the problem: Set the color depth to 16/24Bit AUTOSELECT. On
moving pictures, the human eye is not able to see differences between so many
colors. A reduction to 16Bit reduces the amount of data without (visible) effects.
