DKM SERIES - DIGITAL AUDIO OVERALL FOIL SCREENED SOLID CONDUCTOR MULTIPAIR CABLE
From a design originally developed to meet the stringent specifications for System X digital telephone exchange wiring, these are true 110 ohm cables suitable for AES/EBU digital audio installations. The solid conductors are readily terminated in Krone IDC blocks, which satisfactorily pass digital signals without significant degradation. The cable performs substantially better with digital signals than KSM series analogue audio designs (BBC PSN types), due to the optimised characteristic impedance. There are two foil screens, with solid drain wire for easy termination.
Note: As this cable design is always used in fixed installations, it has been replaced by DKM-LFH. This type has a low smoke zero halogen construction.
Technical Specification:
| Conductors: |
1/0.4mm (0.126mm²) plain copper |
| Insulation: |
High density polyethylene, according to 'BT CW1308 Cable Colour Codes', OD 0.88mm |
| Lay-up: |
Two insulated conductors twisted together, pairs laid up together, and wrapped with polyethylene tape |
| Screen 1: |
Aluminium/polyester tape (aluminium side out) |
| Screen 2: |
Aluminium/polyester tape (aluminium side in), wound opposite direction to screen 1 |
| Drain wire: |
1/0.4mm tinned copper wire, between screens |
| Overall jacket: |
PVC type TM2, turquoise, rip cord laid under jacket |
| Overall diameter: |
DKM5 6.0mm, DKM10 7.7mm, DKM25 11.5mm |
| Minimum bending radius: |
75mm |
| Impedance: |
110 ±10 ohms |
| Conductor resistance: |
15 ohms/100m |
| Velocity ratio: |
66% |
| Propagation delay: |
Any pair in the cable 243ns/50m (min.), 253ns/50m (max.) |
|
Max. difference between any two pairs in the same cable 5.0ns |
| Step response: |
10-50% transition time 4.5ns/50m (min.), 6.5ns/50m (max.) |
|
10-90% transition time 50ns/50m (min.), 110ns/50m (max.) |
| Crosstalk: |
25dB minimum |
| Weight: |
DKM5 4.2kg/100m, DKM10 6.9kg/100m, DKM25 14.8kg/100m |
| Reel length: |
500 metres |
| Cut lengths: |
Available in any multiple of 1 metre |
Manufactured specifically for Canford by Draka Prysmium Multimedia.