GS6042 Datasheet, PDF (15/21 Pages) Semtech Corporation – 6G UHD-SDI/3G/HD/SD Adaptive Cable Equalizer

Levels 0 1 2 3 4 5 6 7 8 _{VCC_A}
Taps
1K 1K 1K 1K 1K 1K 1K 1K 2.6K
Levels
Taps
0
1
2
3
4
5
6
7
8 _{VCC_A}
1K 1K 1K 1K 1K 1K 1K 1K 2.6K
Figure 4-4: Resistor Divider Loopback Example #1
(Function Level 3 from Table 4-5)
Figure 4-5: Resistor Divider Loopback Example #2
(Function Level 4 from Table 4-5)
In Figure 4-4, the automatic muting of the output is established by connecting node 3
to the OP_CTL pin. In this scenario, the output would be 850mV_ppd with 8dB of
de-emphasis when there is a signal present.
In Figure 4-5, the OP_CTL pin is connected to node 4. In this scenario, the output would
be 425mV_ppd with no de-emphasis when there is a signal present.
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.
GS6042
Final Data Sheet
PDS-060055
Rev. 3
May 2014
www.semtech.com
15 of 21
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