DDFDigital Distribution Frame:
1,To use siemens series of radio frequency coaxial
connector of 75oum,
2,Meet the IEC standar

DDFDigital Distribution Frame:

Description

Adopting “general frame + connector units of different pattern “, the digital distribution products including75Ω,120Ω,75Ω/120Ω which are compatible with SINMENSstyles. It’s widely used between digital multiplexing equipment or between digital multiplexing equipment and exchangers, providing function of distribution, transition, test. 
Features
1.     Compact structure can enlarge capacity and operation space  
2.      Modular design and suitable for different pattern units
3.      Standard unit, flexible for transfer and extension 
4.      Reliable grounding protection
5.      Easy to self-loop and on line test
6.      Clear line identification, convenience for maintenance and management
7.       All the idexes meet the IECstandards. 

Electrical properties:

(1) Impedance: 75Ω/120Ω

(2) Working speed: 2Mbit / s, 8Mbit / s, 155Mbit / s and so on.

(3) Return loss: ≥ 18dB (50kHz ~ 233MHz)

(4) insertion loss: ≤ 0.3dB (50kHz ~ 233MHz)

(5) Insulation resistance: ≥ 1000MΩ

(6) Contact resistance: ≤ 2.5mΩ (outer conductors) ≤ 10mΩ (between the inner conductor)

(7) anti-voltage strength: ≥ 1000VC (50Hz) / min

(8) crosstalk between the defensive back line degree: ≥ 70dB (50kHz ~ 233MHz)

(9) Pull strength: ≥ 50N