Introduction 10
A lot of adjustments can also be done on the monitor itself, by means
of an extensive on-screen menu system, accessible from the rear
panel controls.

Power saving system

The MGD 221 is equipped with a power saving system.
When left idle for a certain time, the computer, connected to the
display, will power down the display in several steps. The power
saving system can be switched on or off during the installation or
adjustment of the display.
This system requires a computer imaging board that supports power
saving management.
1.2 Versions and options
The MGD 221 comes in 2 different versions: With an anti-reflective
panel in front of the picture tube, and without panel (No Panel
version).
In both cases, the phosphor is a B4-L8 type.
The type of CRT phosphor and the presence of the coating are
indicated on the label at the rear of the display.
The video input is terminated to 75 Ohm.
Important: It is absolutely necessary that the impedances of imaging
board and display are the same. If not, the image quality will be
inferior.
The MGD 221 can be delivered with the following options: Southern
Hemisphere Compensation and Ambient Light Compensation (ALC).
The MediCal software and the X-Rite DTP92 sensor are not delivered
with the display.
MediCal can be ordered separately.
1.3 About the manuals
This guide is meant for people who want to install and use the MGD
221 display, as well as people who need to install and adjust the
display. The chapter "Advanced Adjustments" is meant for trained
engineers only, because it describes actions and procedures that
require a technical skill to be performed properly.
The use of the software MediCal is described in the MediCal User’s
Manual.