Ensemble Designs 5230 Digital to Analog Video Converter and Disembedder User Manual
Page 9
The 5230 has analog composite or analog component outputs. They are fully timed to your
house reference, including the subcarrier and ScH phase of the composite output. The
analog output is constructed at 8x oversampling with 12 bits of quantizing resolution.
The available video processing remote control menus are summarized below:
•
Proc Menu: Gain, Chroma, Pedestal and Hue are standard Proc Amp controls.
Even though the input is SDI, the Hue control gives phase rotation of the color
vectors in the manner of an NTSC composite Proc Amp.
•
Clip: The Legalizer is a predictive clipper which insures signal levels will not
exceed those permitted in the composite domain. Thus its use can insure a televi-
sion transmitter will not be presented illegal video input. If Off or Legal are
selected other adjustments are grayed and may not be changed. While Legal auto-
matically puts in values to insure signals will not exceed composite legal limits,
selecting Custom allows the operator to insert a range of clip values.
•
Timing: The 5230’s comprehensive range of timing allows complete flexibility in
placement of the output picture relative to the applied reference input. Fine Phase
and Hor Timing take the horizontal timing across the entire line with nanosecond
accuracy. A Vert Timing adjustment completes the range in allowing any output
timing desired by the operator.
•
Status: This dynamic monitoring display provides indicators of video and audio
inputs and EDH error status. The 6230 will show in the Option window when
present.
•
Trim: Cb and Cr offsets allow black balance to be corrected while Cb and Cr gains
permit trimming of levels on these two axes. Y/C delay allows the operator to
correct inaccuracy of timing of color information relative to luminance. These trims
are functional regardless of the input or output formats in use.
•
Blanking: There are Wide, Narrow or Custom blanking choices. Wide gives
blanking through line 20 (NTSC) or line 22 (PAL), while narrow produces blanking
through line 9 (NTSC) or Line 6 (PAL) of both fields. In the Custom mode any indi-
vidual lines from 9 through 23 may be selectively blanked, with different choices
allowed for each field. Some systems recognize position of the V-bit to control end
of blanking. In the 525 standard V-bit position can be set to line 10, line 20 or line
23. In 625 mode V-bit is fixed at line 23 as this is the only position permitted by
the 625 Standard.
•
Memory: Up to five configurations of the 5230 may be saved into memory
registers for later recall. All parameters – gains, input format, filters, blanking,
etc. - are saved in each memory. The 5230 can be used with component analog
outputs in a particular application. In another application it is used with
composite input, noise reduction and embedding of audio from an analog audio
input source. These two setups could be stored in memory registers and one or the
other recalled for instant restoration of the required configuration.
5230/6230-9
Model 5230/6230 Video Audio DAC