![background image](http://html1.mh-extra.com/html/snell-and-wilcox/mdd550-50/mdd550-50_operators-manual_1309056018.webp)
SW3 Position 4
This position allows the back porch to be adjusted.
In NTSC mode the width of the back porch may be
adjusted in 148 ns steps.
Preset value is 4741 ns.
In PAL mode the width of the back porch may be
adjusted in 148 ns steps.
Preset value is 5630 ns.
SW3 Position 5
This position is not used
SW3 Position 6
In this position the vertical phasing or offset between
the reference signal and the output signal may be
adjusted.
In NTSC mode this selection allows the vertical
phasing to be adjusted by
±
262 lines in steps of 1 line.
Preset value is 0.
In PAL mode this selection allows the vertical phasing
to be adjusted by
±
312 lines in steps of 1 line.
Preset value is 0.
SW3 Position 7
In this position the horizontal phasing or offset
between the reference signal and the output signal
may be adjusted.
In NTSC mode this selection allows the horizontal
phasing to be adjusted in steps of 37 ns.
Preset value is 0 ns.
In PAL mode this selection allows the horizontal
phasing to be adjusted in steps of 37 ns.
Preset value is 0 ns.
SW3 Position 8
This position is not used
SW3 Position 9
(Only available in NTSC mode)
This position allows adjustment of the hue or colour
tint of the picture.
Adjustment range is from -180° to +179° in steps of 1°
and preset value is 0°
SW3 Position A
The horizontal picture position (within blanking) may
be adjusted from this position.
The adjustment in steps of 4 ns and preset value is
0 ns.
SW3 Positions B to E
These positions are reserved
SW3 Position F
In this position operating the push buttons will set all
controls to their factory default values.
SECTION 4
Operation
MDD550050398
Software Version 1.3.1 onwards 4.3