Requirements Placed On Video Source; Requirements Placed On Video Signal For A Good Picture Quality; Controller - Siemens SCD 1515-E Operating Instruction

Operating Instruction
Caution
Apparently good pictures on CRT monitors may be displayed with interferences on LCD
monitors.
CRT monitors cannot simply be replaced by LCD monitors!
3.6.2

Requirements placed on video source

The following points must be observed in the system in order to guarantee correct operation
of the LCD monitors.

3.6.2.1 Requirements placed on video signal for a good picture quality

The most video timings work with sync on green. V-impulse, H-impulse and image
information "green" are on the same interface and have to be decoded from electronic.
The max. level of the standard video signal is 1 V , the pulses are between 0 V and +0.3 V,
PP
the picture information between +0.3 V and 1 V.
The pulses should have narrow flanks and interferences are not allowed to superimpose
them.
Red and blue should have the same level as green.
Determine these requirements at the monitor input using an oscilloscope.

3.6.2.2 Controller

There are several development generations and versions for each controller (e.g. WF470):
For example, the video unit has different designs.
There are controllers with a fixed output level, as well as ones with an output level controlled
using potentiometers or plug-in jumpers (0.7 V; 1 V; 1.4 V).
The programmed video timings may also differ depending on the application.
You can obtain detailed information from the hotline responsible for the respective controller.
LCD-Monitor SCD 1515-E page 43 / 56
DOC-No.: B30058DE8.doc