Operating Instruction
LCD-Monitor SCD 1815-E
page 41 / 52
DOC-Nr.:
B30055DE6.doc
3.6.
Operating the SCD1815
on older videosystems
This capture shows arrangements for an undisturbed operation with the video sources.
3.6.1. General
situation
Components for the production of CRT monitors of 15 kHz and above are no longer manufactured,
and we therefore had to stop production of such 15-kHz monitors. Since older systems are still in use,
and monitors of 15 kHz and above are still required, we have extended our "Industrial LCD monitors"
for operation at 15 kHz and above.
The video signal for the CRT monitor is processed and displayed in analog mode.
With the LCD monitor, the video signal at the input is immediately digitized, and processed and
displayed in digital mode.
These two technologies place different requirements on the video signal and respond differently to
non-standardized video signals.
Caution
Apparently good pictures on CRT monitors may be displayed with
interferences on LCD monitors.
CRT monitors cannot simply be replaced by LCD monitors!
3.7. Requirements placed on video source
The following points must be observed in the system in order to guarantee correct operation of the
LCD monitors.
3.7.1. Requirements placed on video signal for a good picture
quality
The max. level of the standard video signal is 1 V
pp
, the pulses are between 0 V and +0.3 V, the
picture information b0.3 V and 1 V.
-
The pulses should have steep edges, and interferences must not be superimposed on them.
-
Red and blue should have the same level as green.
Determine these requirements at the monitor input using an oscilloscope.
