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CVBS differential cable for evaluation board "EVAL-ADV7281A-M".

Question asked by Tamu on Apr 11, 2018
Latest reply on Apr 15, 2018 by Tamu

Hello,

 

I have a question about differential cable for evaluation board "EVAL-ADV7281A-M".

 

This device supports full or pseudo differential CVBS input.

The "EVAL-ADV7281A-M" documents are as follows:
http://www.analog.com/media/en/technical-documentation/user-guides/EVAL-ADV7281AMEBZ-UG-1173.pdf
http://www.analog.com/media/en/technical-documentation/evaluation-documentation/adv7281am-adv7282am-32ebz-sch_a.pdf

I think we can evaluate differential CVBS input with this board.
The UG-1173.pdf says as follows on page 3.
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Configuring AIN3 and AIN4 for Differential CVBS
To configure AIN3 and AIN4 to receive differential CVBS, make the following resistor changes on the evaluation board:
1.Replace Resistor R11 and Resistor R12 with 1.3 kΩresistors.
2.Replace Resistor R4 and Resistor R10 with 430 Ω resistors.
3.Replace Resistor R32 with a 75 Ω resistor for pseudodifferential CVBS or with a 150 Ω resistor for fullydifferential CVBS.
4.Connect the positive input to AIN3 and the negative inputto AIN4.
----------------------------------------------------------------

 

But the connecters are RCA. I think it's generally used for single-end CVBS.

 

Question:
 What kind of cable do you suppose for differential CVBS input evaluation with the "EVAL-ADV7281A-M" ?
 UTP(Unshielded Twist Pair) or STP(Shielded Twist Pair) cable? Don't you suppose UTP or STP cable?

 

Thank you!
Best regards.
Tamu

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