IBM E74M manual

Models: E74M

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DDC (Display Data Channel)
DDC is a communication channel over which the monitor automatically informs the host system (PC) about its capabilities.This monitor has DDC function; DDC2B. DDC2B carry out uni-directional communication between the PC and the monitor. Under these situations, the PC sends display data to the monitor but not commands to control the monitor settings.
Note : PC must support DDC functions to do this.
If your monitor is displaying a monochrome image or the wrong resolution, select the DDC OFF function.
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N O S I G N A L
C H E C K S I G N A L C A B L E
S E L F D I A G N O S T I C S
This monitor can sense when there is a possible problem present, and informs you of this condition by presenting you with a SELF DIAGNOSTICS OSD. This OSD may pop up
when it is On but no signal is detected. In this case the message CHECK SIGNAL CABLE will be high lighted, alerting you to check the signal cable connections.
Low Radiation Compliance (MPR II)
This monitor meets one of the strictest guidelines available today for low radiation emissions, offering the user extra shielding and an AGAR. These guidelines, set forth by a government agency in Sweden, limit the amount of emission allowed in the Extremely Low Frequency (ELF) and Very Low Frequency (VLF) electromagnetic range.
Self Diagnostics
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IBM E74M manual