Skip to main content
added 342 characters in body
Source Link
user16324
user16324

Is there an equivalent to this cable where the data member is a "star quad" cable? A differential signalling standard on correctly wired "star quad" cable is more resistant to interference.

Star quad cable has 4 conductors in a circle (I numbered them clockwise below)
1 2
4 3
Use 1 and 3 in parallel for one leg, and 2 and 4 for the other. This gives much better noise cancellation than a regular twisted pair.

The downside of star quad is a much higher capacitance between legs, but over short (1m) runs that won't be such a problem.

edit : this tight twist is what I think of as star quad; though ordinary quad used the same way will also provide reasonably good immunity to interference. Image from the Canford catalogue.

Star Quad cable

Is there an equivalent to this cable where the data member is a "star quad" cable? A differential signalling standard on correctly wired "star quad" cable is more resistant to interference.

Star quad cable has 4 conductors in a circle (I numbered them clockwise below)
1 2
4 3
Use 1 and 3 in parallel for one leg, and 2 and 4 for the other. This gives much better noise cancellation than a regular twisted pair.

The downside of star quad is a much higher capacitance between legs, but over short (1m) runs that won't be such a problem.

Is there an equivalent to this cable where the data member is a "star quad" cable? A differential signalling standard on correctly wired "star quad" cable is more resistant to interference.

Star quad cable has 4 conductors in a circle (I numbered them clockwise below)
1 2
4 3
Use 1 and 3 in parallel for one leg, and 2 and 4 for the other. This gives much better noise cancellation than a regular twisted pair.

The downside of star quad is a much higher capacitance between legs, but over short (1m) runs that won't be such a problem.

edit : this tight twist is what I think of as star quad; though ordinary quad used the same way will also provide reasonably good immunity to interference. Image from the Canford catalogue.

Star Quad cable

Source Link
user16324
user16324

Is there an equivalent to this cable where the data member is a "star quad" cable? A differential signalling standard on correctly wired "star quad" cable is more resistant to interference.

Star quad cable has 4 conductors in a circle (I numbered them clockwise below)
1 2
4 3
Use 1 and 3 in parallel for one leg, and 2 and 4 for the other. This gives much better noise cancellation than a regular twisted pair.

The downside of star quad is a much higher capacitance between legs, but over short (1m) runs that won't be such a problem.