Technical Manual
HDFS-550/551/552 Frame Synchronizer Cards
Publication 81-9059-0606-0
1-1
Chapter 1 Introduction
1.1 HDFS-55X
Cards
Fortel DTV’s HDFS-55X High Definition (HD) frame synchronizer cards are designed to support both
HD-SDI (SMPTE 292M) and SD-SDI video formats. It accepts an HD SMPTE 292M or 259M input to a
local reference tri-level or composite sync signal input. When locked to a local reference, it provides an
infinite phasing adjustment window. A video proc-amp provides signal-level adjustments in the component
domain (Y, Cb, Cr, Black).
The DAS-441 Audio Synchronizer option provides control of embedded audio with gain, mixing, shuffling,
and delay adjustment. This decoder generates a cleaner, more accurate HD signal by eliminating quantizing
errors and unwanted comb artifacts.
Its Perfect-Palette™ Legalizer fixes gamma errors better by first analyzing what color it was supposed to be
and then correctly adapting each pixel to a legal value without causing a hue shift while minimizing clipping
effects. There are independent settings for RGB, Luminance and Composite thresholds.
The following are key features of HDFS-55X cards:
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Any input standard with auto detection (2X1 switch).
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Second input can be used as AES input for HDFS-552 card.
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Output HD-SDI in SMPTE 292M.
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Separate monitoring SDI down-converted output.
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NTSC/PAL output timed to reference (jumper to AES).
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Synchronizer and Legalizer standard.
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Optional color corrector with eight memory settings.
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Four-group de-embed, synchronization and all audio processing including shuffle, phase reversal,
summing, soft clip, ALC, Dolby-E, synchronization and embed.
•
Works with DAS-441 for parallel audio synchronization (analog or AES) with or without de-embed
and embed.