15
9.1.2 Ground reference terminal
A good earth connection between the CDN and the earth reference plate is essential. This
terminal of the CDN provides a solid earth connection point to the test system. There is no
need to connect the earth connector from the generator itself, since the surge connectors
provide the reference ground from the generator to the CDN.
9.1.3 Surge input sockets
These sockets (High, Low) serve to connect the surge signal from the generator to the CDN.
The surge output from the generator is potential free (floating). The inner conductor of each
connector is the surge high and surge low connection respectively while the outer conductor
(shielded) is connected to the instruments earth.
9.1.4 LED indicator
LED indicator function
Description
Power on
Instrument/system in operation
Pulse
Shows the occurrence of a pulses or a test event
Pulse blinking
The generator is set to a safe position and need some seconds
to move the switch into the final position.
High voltage active
Shows that high voltage is present in the instrument (in line with
“Pulse” LED)
EUT-Power on
Indicates when the power supply to the EUT is present at the
EUT connector on the front panel
Error
Indicates that a system error has occurred