FSR
MDC – MK1 Operations Manual [
Page 8 of 28
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SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
Freeze - Quick Set
This is another quickset button, labeled 'FREEZE'. When pressed the first time, the unit will enter a
special mode where the video image and all other features are frozen.
Freeze will remain active until disabled by pressing 'FREEZE' again, and the whole unit will remain
frozen until this happens.
No other features are accessible while in Freeze mode, except the RESET button on the remote
control unit.
Total Lines - Information
This will appear when in Status mode to show how many scan lines are in the incoming PC picture.
This is including blanked lines that are not normally viewable, so a 1024 x 768 image might actually
have a total of 806 lines in it, with 38 of them used for 'vertical blanking'.
Vert Frequency - Information
Again, this is just for information, and shows the vertical refresh rate of the incoming PC signal.
Multiply this by the 'Total Lines' value to give the horizontal refresh rate. High refresh rates are
generally more acceptable when displayed on computer monitors, the Magellan MDC - MK1 prefers
a low refresh rate so that it's capture circuitry has more time to capture more pixels, thus giving a
clearer picture.
5.2 Adjust
You can enter this from 'Status' mode by pressing the MENU button once. This enters the beginning
of a number of menus that allow complete control over the unit's features. All menus time-out after
about 25 seconds of inactivity (returning you to the Status display), or you can press the + button
when 'Exit' is displayed at the end of each menu list to return to the previous menu.
The various options from this menu are all selected by pressing MENU repeatedly:
Flicker Reduction
The unit defaults to using a 4-line filter, which is best for 800 x 600 displays. Pressing the + or -
buttons when this option is displayed will change this to 2-line or 6-line.
§
2-line mode is not advisable, unless the vertical image softening that is present because of
higher flicker reduction modes needs to be avoided. Line dropping will be common in this setting.
§
4-line mode is best for resolutions around 800 x 600 and 1024 x 768, but is down to personal
taste, and the exact nature of the graphics or text being displayed. Thin horizontal lines cause
the most flicker and if this is seen, then the highest flicker reduction filtering should be used.
§
6-line offers the maximum amount of flicker reduction, and allows images (even CAD wire-frame
drawings) to be displayed up to a resolution of 1600 x 1200 without line dropping. This mode
may not be suitable for low resolutions, because of excessive vertical softening of the image -
but again this is down to personal preference.
