The CPC is connected to the RGB input of a Philips Philetta TV Set (this is important for the test, as the monitor does pull-down the signals, without monitor connected both "max" and "half" signals are around 4.0V, with monitor connected they drop to circa 1.0V and 0.5V, as seen in the pictures).
== Weblink ==
* http://grimware.org/doku.php/documentations/devices/gatearray - describes the intensities in great detail