Layout Guideline - Advantech SOM-ETX Series Design Manual

Advantech SOM-ETX Design Guide
Figure 5-38 One Composite and One SCART Outputs
Note : Terminator resistor value may different due to different TV encoders chip.
However, the Termination resistor , output filter and ESD protection diodes be
implemented at SOM-EXT. Carried board should keep the trace impendence equal
75 ohm.

5.12.3 Layout Guideline

5.12.3.1 TV DAC routing
The minimum spacing between each TV DAC signals is 40mils but 50 mils is
preferred. A maximal amount of spacing should be used between each TV DAC
signals as well as to all other toggling signals. This is to prevent crosstalk between
the TV DAC signals and other toggling signals .The routing for each TV DAC signal
should also be matched and balanced as much as possible .All TV DAC signals
should be routed on the same layer ,have a similar number of bends ,same number
of vias ,etc. All routing should be done with ground referencing as well.
104 Chapter 5 Carrier Board Design Guidelines