GS3440 Adaptive Cable Equalizer

Final Data Sheet

Rev. 2

December 2012

15 of 23

Proprietary and Confidential

4.6 GAIN_SEL

The GS3440 has an option of compensating for 6dB of flat attenuation prior to the

equalizer.

4.7 Adjustable Output Swing, De-Emphasis and Mute

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

and DDO.

The OP_CTL pin is an analog input, allowing different combinations of output swing,

de-emphasis and mute. The possible values are listed in Table 4-5.

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: OP_CTL Functions and Levels

Level

Swing

De-emphasis

Mute

Voltage (V)

Off

N

0.000 - 0.083

2dB

N

0.234 - 0.394

4dB

N

0.545 - 0.704

6dB

N

0.856 - 1.015

Off

N

1.166 - 1.333

2dB

N

1.484 - 1.644

6

4dB

N

1.795 - 1.954

6dB

N

2.106 - 2.265

N/A

Y

2.416 - 2.500