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USB cable shield resistance technical measurements | Super ...
https://www.superbestaudiofriends.org/index.php?threads/usb-cable-shield-resistance-technical-measurements.5662/
To perform well the shield requires a low ohm galvanic connection with the A and B end connectors. 8 USB cables were evaluated for shield resistance to A and B end connectors. 5 - generic, the type usually included a with USB device. 2 - Audioquest Forest, 0.75 meter and 1.5 meters length. 1 - Schiit Pyst. Data were acquired using the following:
An Overview of Audio System Grounding & Shielding
http://www.bennettprescott.com/downloads/grounding_tutorial.pdf
Cable Shielding Shields prevent ONLY electric field coupling Electric fields produced by high ac voltages Capacitance Cc in space to offending source AC voltage causes current flow in Cc Without shield, current flows into signal line, creating a noise voltage Grounded shield diverts currents to ground
Understanding Shielded Cable - Mouser Electronics
https://www.mouser.com/pdfdocs/alphawire-Understanding-Shielded-Cable.pdf
Understanding Shielded Cable Page 4 In practice, the purpose the shield is to conduct to ground any of the noise it has picked up. The importance of this cannot be overstated—and failure to understand the implications can mean ineffective shielding. The cable shielding and its termination must provide a low-impedance path to ground.
Hum Rejection in Unbalanced Audio Cables -- Blue Jeans Cable
https://www.bluejeanscable.com/articles/humrejection.htm
Cable Shield Type Shield Resistance; Canare LV-77S: Double Braid: 1.8 ohms/1000 ft. Belden 1505F : Double Braid : 2.4 ohms/1000 ft. Canare L-5CFB: Braid/Foil: 2.1 ohms/1000 ft. Belden 1694A : Braid/Foil: 2.8 ohms/1000 ft. Belden 89259: Single Braid: 2.6 ohms/1000 ft. Canare LV-61S: Single Braid: 4.0 ohms/1000 ft. Belden 1800F: French Braid: 5.0 ohms/1000 ft.
The Effects Of Cable On Signal Quality - Audio Systems Group
http://audiosystemsgroup.com/CableCapacitance.pdf
about 330m (1,100 feet) of cable. Audio cable is available in three ra most flexible and snake cable, has about 30-34 pf per foot. Low-capacitance cable has about 20 pf per foot and is more expensive. Special cable constructions optimized to reduce noise pickup (star-quad and some double-shielded cables) have 46-56pF per foot.
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