GS3441 Extended Reach 3G/HD/SD Adaptive Cable

Equalizer with Dual Outputs

Final Data Sheet

Rev. 1

GENDOC-056647

May 2013

16 of 25

Proprietary & Confidential

www.semtech.com

4.6 GAIN_SEL

The GS3441 has an option of compensating for 6dB of flat attenuation prior to the

equalizer.

4.7 Adjustable Output Swing, De-Emphasis and Mute

The OP1_CTL input pin determines the output swing and de-emphasis settings for the

first output (DDO1/DDO1), and OP2_CTL input pin determines the output swing and

de-emphasis settings for the second output (DDO2/DDO2).

The OP1_CTL and OP2_CTL pins are both analog inputs, allowing different

combinations of output swing, de-emphasis and mute. The possible values are listed in

Table 4-5 below:

Table 4-3: CD Output Table

CD

Input Status

0Valid input on SDI, SDI pins

1

Input is not valid

Table 4-4: GAIN_SEL Input Table

GAIN_SEL

Function

0No flat band gain is applied

1

6dB of flat attenuation will be

compensated by the device

Table 4-5: OP1_CTL and OP2_CTL Functions and Levels

Level

De-emphasis

Mute

Voltage (V)

0

850mVppd

Off

N

0.000 - 0.083

1

850mVppd

2dB

N

0.234 - 0.394

2

850mVppd

4dB

N

0.545 - 0.704

3

850mVppd

6dB

N

0.856 - 1.015

4

425mVppd

Off

N

1.166 - 1.333

5

425mVppd

2dB

N

1.484 - 1.644

6

425mVppd

4dB

N

1.795 - 1.954

7

425mVppd

6dB

N

2.106 - 2.265

8

425mVppd

N/A

Y

2.416 - 2.500