Thor 1- 4 HDMI to QAM Modulators - Manual (Page 12)

H-4SDI-or-4HDMI-QAM-IP

Always use copper wire. When applied correctly the ground must be wrapped
well to ensure maximum conduction so it can reduce any high frequencies. The
copper ground wire should also be as short and thick as possible

Installer must make sure that the two ends of the ground are well conducted
and have appropriate anti-rust properties.

It is prohibited to use any other device as part of the grounding electric
circuit.

The area of the conduction between the ground wire and device’s frame
should be no less than 25 ㎡.
Chapter 3 Operation
3.1 LCD Menus
An overview of the LCD menus: