GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3

Tel. +1 (905) 632-2996

Fax. +1 (905) 632-5946

E-mail: info@gennum.com

www.gennum.com

Revision Date: March 2000

Document No. 522 - 05 - 02

PRELIMINARY DATA SHEET

HDTV Adaptive Equalizer

FEATURES

• SMPTE 292M compliant

• Automatic, adjustment free cable equalization for

1.485Gb/s HDTV signals

• Differential serial outputs capable of driving 50

Ω 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

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.

BLOCK DIAGRAM

ORDERING INFORMATION

PART NUMBER

PACKAGE

TEMPERATURE

GS1504-CKD

16 pin narrow SOIC

0°C to 70°C

GS1504-CTD

16 pin Tape and Reel

0°C to 70°C

CABLE LENGTH INDICATOR/ADJUSTOR

CARRIER DETECT

MUTE

MCLADJ

CLI

CD/MUTE

EQUALIZER

DC

RESTORE

OUTPUT

AGC

SDI

SDI

SDO

SDO

PATENT PENDING