Chapter 18 • Tbc; Skip This Chapter; What Is A Tbc; Using The Tbc - Videonics MX-1 Instruction Manual

VIDEONICS DIGITAL VIDEO MIXER
Chapter 18 • Chapter 18 •
The MX-1 includes a time base corrector for top quality results.
This section describes some details of TBC operation.

Skip This Chapter?

Note that because the TBC operates automatically, most users can skip the
rest of this chapter, which contains technical details of TBC operation.

What is a TBC?

A time base corrector modifies a video signal so that all the elements that
make up the picture — the lines, fields, frames, and individual dots (pixels)
— appear on the OUTPUT screen exactly where they should. It compensates
for the shifting and wavering that are inherent in most VCRs, camcorders,
and other video devices. See the Digital Video Primer pamphlet for more
information.

Using the TBC

The MX-1's built-in TBC is always active — it cannot be disconnected or
disabled and no user action is required to turn it on.

Dual TBC Mode

It is possible to use the MX-1 as a dedicated two-channel TBC which
performs time base correction on two separate channels. Here's how:
• Set up one source as the CURRENT source and a second one as the NEXT
source.
• Press the DISPLAY button once. This makes the PREVIEW OUT carry the
NEXT source, instead of showing the PREVIEW screen.
• The OUT jack carries the CURRENT source as usual.
The result is that the two sources will each appear on its own output and
both will have the benefit of time base correction.
While acting as a dual TBC, the Mixer can still perform cuts, as usual. Use
the CUT buttons to change the CURRENT source (the one that appears on the
OUT jack). Use the ABCD buttons to choose the NEXT source (which appears
on the PREVIEW jack).
TBC
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