![background image](http://html1.mh-extra.com/html/snell-and-wilcox/mdd550-50/mdd550-50_operators-manual_1309056022.webp)
SW6 (UP = OFF, DOWN = ON)
Position 1 Input Signal Set-Up
(Only available in NTSC mode)
This switch should be set to the OFF position if the
input signal has set-up (e.g. NTSC USA); it should be
set to the ON position if the input signal does not have
set-up (e.g. NTSC Japan)
Position 2
This position is not used
Position 3
See SW5 positions 1 and 2
Position 4 Vertical Blanking
In the OFF position all lines during vertical blanking are
blanked; in the ON position all lines are passed
through.
Positions 5 & 6
These two positions allow the reference source to be
selected. ( 0=OFF, 1=ON and X=Don’t Care)
Reference
Source
Position 5
Position 6
Freerun
0
0
Picture Input
0
1
Reference Input
1
X
Position 7
Setting this to ON applies the clipping function to the
output signal. Clipping levels are at peak white, black
and 100% chrominance.
SECTION 4
Operation
MDD550050398
Software Version 1.3.1 onwards 4.7