TV One C2-4000 Series, Руководство пользователя

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C2-4000 Series RGB Scaler Operation Manual
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the width of the Back Porch have a direct bearing on where the active (visible)
portion of the image begins.
When parked on the above screen, press the Menu Select knob and the
brackets will begin to flash. Adjust the parameter and press the knob again.
Rotate the knob one detent to the right, press the knob and adjust the second
parameter. Press the knob again to record that value. There is a certain
amount of interaction between the two controls so make your adjustments
carefully and slowly. To make this adjustment, an oscilloscope must be
employed so you can see the results of your actions in a more graphic
manner. Do not attempt this adjustment without monitoring the results with an
oscilloscope.
16.7 H/V Sync
There are standards for all current computer and broadcast resolutions that
specify the correct width of both Vertical and Horizontal synchronizing pulses.
If you are creating a special, non-standard resolution, you may wish to adjust
the pulse width to fit your new requirements. The H/V Sync screen is where
that is accomplished.
When the above screen is visible, press the Menu Select knob until the
brackets begin to flash. Set the value for the Horizontal Pulse and press the
knob again to record your choice. Rotate the knob one detent to the right and
repeat the process for the Vertical Sync pulse width. Like the H/V Start
adjustment, you must use an oscilloscope when making these adjustments so
that you know exactly how many milliseconds or microseconds of pulse width
you have created. The numbers shown on the LCD screen are relative
numbers and not an actual time measurement.
16.8 Sync Polarity
Sync can be either negative polarity or positive polarity. To further complicate
things, it is possible that you may want to make the Horizontal Sync polarity
different from the Vertical Polarity. This control allows you to make that
change. From the screen shown above, press the Menu Select knob and the
brackets will begin to flash. You have four possible selections: “+H+V”, “-
H+V”, “+H-V” and “-H-V”. Rotate the Menu Select knob until your desired
selection appears and then press the knob to record the choice.
800 x 600 60 Hz
H/V Sync [ 128] x 4
800 x 600 60 Hz
Sync polarity [+H+V]