GS1504 Datasheet, PDF (1/12 Pages) Gennum Corporation – HDTV Adaptive Equalizer

HD-LINX ^™ GS1504
HDTV Adaptive Equalizer
FEATURES
• SMPTE 292M compliant
• Automatic, adjustment free cable equalization for
1.485Gb/s HDTV signals
• Differential serial outputs capable of driving 50Ω loads
• Typically equalizes 100m of Belden 8281 or 150m of
Belden 1694 high quality co-axial cable
• Cable Length Indication
• Output Mute
• Maximum Cable Length Adjust
• Low power
• Minimal external components
• Single +5V or -5V power supply operation
APPLICATIONS
1.485Gb/s HDTV Serial Digital Receiver Interfaces for
Routers, Distribution Amplifiers, Switchers, and other
receiving equipment.
DESCRIPTION
PRELIMINARY DATA SHEET
The GS1504 is a high performance cable equalizer
designed to equalize HDTV component signal conforming
to SMPTE 292M. The adaptive cable equalizer is capable of
equalizing up to 100m of Belden 8281 co-axial cable.
The GS1504 features DC restoration for immunity to the DC
content in pathological test patterns. The device also
incorporates a Cable Length Indicator signal that provides
an indication of the amount of cable being equalized.
A voltage programmable mute threshold (MCLADJ) is
included to allow muting of the GS1504 output when a
selected cable length is reached. This feature allows the
GS1504 to distinguish between low amplitude HD SDI
signals and noise at the input of the device. The CD/Mute
pin provides an indication of the GS1504 mute status in
addition to functioning as a mute control input. The output
of the GS1504 may be forced to an active or a mute
condition by applying a voltage to the CD/Mute pin.
The GS1504 is a low power device that operates from a
single 5V power supply. The GS1504 is packaged in a
16 pin narrow SOIC and does not need external pull-up
resistors.
ORDERING INFORMATION
PART NUMBER
PACKAGE
GS1504-CKD
16 pin narrow SOIC
GS1504-CTD
16 pin Tape and Reel
TEMPERATURE
0°C to 70°C
0°C to 70°C
MCLADJ
SDI
SDI
CABLE LENGTH INDICATOR/ADJUSTOR
CARRIER DETECT
MUTE
EQUALIZER
DC
RESTORE
OUTPUT
CLI
CD/MUTE
SDO
SDO
AGC
PATENT PENDING
BLOCK DIAGRAM
Revision Date: March 2000
Document No. 522 - 05 - 02
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. [phone] Fax. [phone] E-mail: [e-mail]
www.gennum.com