1. Product Overview

The 3070800143 is a 12-channel multi-purpose digital signal cable designed specifically for professional live touring applications.

Key capabilities:

• Transmits AES3 digital audio over distances up to 250 m
• Backward compatible with DMX-512 and balanced analog audio
• Ultra-low capacitance design minimizes high-frequency signal loss

2. Core Technology: The descin Structure

2.1 Background: What Is SCIN?

This cable was engineered in response to the SCIN problem documented in RANE Note 166.

SCIN — Shield Current Induced Noise

The fundamental principle of balanced audio is that both conductors of a signal pair receive electromagnetic interference equally, so the differential amplifier at the receiver can cancel it out completely.

When an aluminum foil shield is exposed to external electromagnetic fields, it induces a current that flows into the drain wire.

This is called shield current.

If the drain wire and the two signal conductors are not kept at exactly equal distances from the shield, one conductor picks up more noise than the other. This imbalance converts common-mode (identical) noise into differential-mode noise — which a balanced amplifier cannot reject.

That conversion is SCIN.

The solution: tight pair twisting AND a geometrically stable, equidistant shield.

2.2 How the descin Structure Works

descin (short for “de-SCIN”) is a symmetric shielding architecture that forces shield currents to couple equally onto both conductors, so they remain common-mode and are rejected by the receiver.

Construction layers (inside out):

• Tightly twisted, low-capacitance signal pair (high twist rate)
• Aluminum foil layer — establishes a consistent, gap-free shield base
• 16×4 medium-density braided shield over the foil
• Combined, these layers form a stable cylindrical plane that maintains equal distance to both conductors at all points

Outcome: Shield current is converted entirely into common-mode noise on both conductors simultaneously, which the differential amplifier at the receiver rejects effectively.

2.2 How the descin Structure Works

descin (short for “de-SCIN”) is a symmetric shielding architecture that forces shield currents to couple equally onto both conductors, so they remain common-mode and are rejected by the receiver.

Construction layers (inside out):

• Tightly twisted, low-capacitance signal pair (high twist rate)
• Aluminum foil layer — establishes a consistent, gap-free shield base
• 16×4 medium-density braided shield over the foil
• Combined, these layers form a stable cylindrical plane that maintains equal distance to both conductors at all points

Outcome: Shield current is converted entirely into common-mode noise on both conductors simultaneously, which the differential amplifier at the receiver rejects effectively.

Versus conventional drain-wire construction: In a standard foil + drain wire cable, the drain wire can migrate during flexing, creating unequal coupling distances to the two conductors.

This converts common-mode interference into differential-mode noise that cannot be rejected.

The descin structure eliminates this failure mode.

2.3 Cable Construction

[ (7/0.18 BC + PE 1.3) × 1P + AL + BD 16×4/0.10 TC + PVC 3.7 ] × 12C + PVC Outer Jacket

3. Product Specifications & Applications

3.1 Design Intent

Designed for professional live touring. Channel configurations are sized to fully utilize VEAM-standard euroblock connector pin counts:

• Available in: 12 CH / 16 CH / 18 CH / 24 CH / 28 CH

Note: The 8-channel version uses a 0+8 core layout, which results in a larger overall diameter.

3.2 Supported Signal Types

• AES3 digital audio multi-core snake — verified up to 250 m
• DMX-512 control multi-core snake
• Low-noise balanced analog multi-core (lower high-frequency rolloff and lower THD+N than conventional cables)

⚠  Not recommended for extremely high-EMI environments.

4. Performance Comparison

Measured performance versus existing multi-core cables in the product lineup:

5. Key Engineering Findings

5.1 Wrapped / Served Shield Fails at High Frequency

• At high frequencies, gaps open in a wrapped or served shield as the cable flexes. These gaps cause the shield impedance to rise and the wrapped shield to behave as a series inductor, dramatically reducing the usable signal transmission distance.
• Conclusion: Wrapped / served shield construction is not suitable for high-frequency signal cables.
• MOGAMI’s wrapped-shield cables are appropriate for fixed studio installations only — they are not suitable for live touring.

5.2 Flex Reliability of Wrapped Shields

• A wrapped shield requires an extremely high strand count to achieve complete coverage. Even so, flexing the cable reopens gaps, making it inherently unreliable for portable applications.

5.3 Foil + Braid Shield Is Effective with Moderate Braid Density

• A foil + braid construction maintains the correct characteristic impedance relationship between the shield and the signal pair even at moderate braid density.
• Verified in testing: Both a 64-strand braid and an 80-strand braid variant passed full AES3 signal transmission at 250 m.

6. Existing Product Review & Discontinuation Recommendations

The following part numbers are recommended for discontinuation:

Exception — 3070100180: This part also uses a wrapped shield with non-durable foam insulation; however, it includes a PE filler rod that provides additional structural support. Recommended for retention pending further review.