Circuit Description
Figure 1 is a block diagram of the VP301 showing
signal flow and the location of front panel controls
and switches. Composite Video and S-Video
inputs are connected to the decoder with AGC
control and converted to Y, R-Y and B-Y signals.
The Y, (Luminance) output from the decoder
enters the input switcher while the R-Y and B-Y
signal enter the Chroma Enhancement block
where the Tint phase can be adjusted when select-
ed in the manual mode. The RGB input signals are
transcoded to Y, R-Y, and B-Y signals and fed to
the input switcher. Component signals are fed
directly to the input switcher.
The input switcher then selects the correct function
and outputs the Y signal to the Luminance Line
Multiplier block. The Luminance Line Multiplier
block contains the Brightness, Contrast and
Freeze controls while the R-Y and B-Y signals
enter the Chroma block where the color level can
be controlled along with the Freeze controls. The
Line Multiplier Luminance signal now enters the
Luminance Detail and Noise Reduction block
where the functions of Noise Reduction and
Detail Level are controlled.
The Luminance signal from the Luminance Detail
and Noise Reduction block along with the R-Y and
B-Y signals from the Chroma Line Multiplier block
feed the output transcoder and are converted
to RGB signals. These RGB signals are buffered
and then sent to both the BNC and monitor
output connectors.
When using the RGB or Component inputs, Sync
is derived from the G or Y input signals unless
sync is provided to the Composite Sync input. The
Composite Sync input will override the sync from
the G or Y inputs. The sync signal then feeds the
VP301 clock generator and is used as a reference
to generate Horizontal Sync, Vertical Sync and
Composite Sync.
Inventory List
1 VP301 Digital Video Processor
1 Installation/Operation Manual
1 Warranty Card
1 Power Cord
5
SYSTEM DESCRIPTION
Caution Notes
Do not connect the VP301 to a Monitor/
Projector not capable of the correct scan
rates. (40KHz)
High Voltages are present inside. Opening
the unit will void all warranties.
No user serviceable parts inside.
Summary of Contents for VP301
Page 18: ...17 ...
