GS3441 Extended Reach 3G/HD/SD Adaptive Cable

Equalizer with Dual Outputs

Final Data Sheet

Rev. 1

GENDOC-056647

May 2013

17 of 25

Proprietary & Confidential

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Automatic muting of the output can be enabled by connecting the CD pin to the

OP1_CTL and OP2_CTL pins.

If the connection is made directly, as shown in Figure 4-1, the output would be in its

Figure 4-1: Direct Loopback

To enable automatic muting while the output is configured for other settings, a resistor

network should be used between CD and VCC_A. The intermediate voltages of this

resistor ladder can set the output to any one of the nine different settings as shown in

Figure 4-2 and Figure 4-3.

In Figure 4-2, automatic muting of the output is established by connecting node 3 to the

when there is a signal present.

In Figure 4-3, the OPx_CTL pin is connected to node 4. In this scenario, the output would

In both cases, the output would be muted when no carrier is detected.

Note:

When the device is in SLEEP mode, automatic muting and SQ_ADJ do not

function. Asserting the SLEEP pin manually overrides all other functionality.

Figure 4-2: Resistor Divider Loopback Example #1

(Function Level 3 from Table 4-5)

Figure 4-3: Resistor Divider Loopback Example #2

(Function Level 4 from Table 4-5)

VCC_A

1k

Ω 2.6kΩ

012345

6

78

Levels

Taps

1k

Ω

1k

Ω 1kΩ

1k

Ω

1k

Ω

1k

Ω

1k

Ω

VCC_A

012345

6

78

Levels

Taps

1k

Ω 2.6kΩ

1k

Ω

1k

Ω 1kΩ

1k

Ω

1k

Ω

1k

Ω

1k

Ω