Features
The DIGI-COUPLER 75 Ohm features a very constant and precise 75 Ohm impedance: 75 Ohm ± 0.5 Ohm up to 3 GHz. This is important, since otherwise the signal will be reflected up and down the cable (i.e. standing waves). Such signal reflections deteriorate signal integrity by causing the digital audio signal as seen at the receiving end to be overlapped with time delayed replicas of itself (i.e. signal reflection induced inter-symbol interference).At the receiving side this negatively influences the D-to-A converter clock retrieval circuitry’s (PLL’s) ability to maintain a stable sample rate (i.e. fluctuations in the timing interval between the audio signal’s samples occur). The resulting distortion of the audio signal is officially called “jitter distortion” and is particularly perceivable as reduced resolution and imaging.
The DIGI-COUPLER 75 Ohm’s supreme immunity against radio frequency and electromagnetic interference allows trouble-free use of large lengths. Multiple lengths can be run in parallel without risk of mutual interference, even with other cabling (e.g. in cable conduits).
The DIGI-COUPLER 75 Ohm features high purity dense silver coated stranded shields as well as a rugged and hard-wearing jacket made of our HULLIFLEX ® polymer insulation material. All providing an optimal protection against chemical (corrosive) attack from the outside world and ensuring a very long lifespan
The DIGI-COUPLER 75 Ohm features a very high frequency bandwidth. As an example: The -3 dB bandwidth of a 10 m. run is 770 MHz. A high bandwidth is important: An SPDIF digital audio signal contains frequencies that extend far beyond the usually specified minimum required bandwidth (~6 MHz). Even though this minimum bandwidth provides useable transmission, accurate data transmission and recovery of low-jitter clocks in real-world noisy environments will benefit from greatly increased bandwidth. The digital audio signal consists of elementary data units (bits) in the form of zeros and ones. These are square waves (merlon shaped elements) which vertical edges serve as a demarcation for the signal receiving circuitry (e.g. D-to-A converter) to be able to retrieve the signal clock and to recognise the contained bit values.
The DIGI-COUPLER 75 Ohm is a so-called “Superscreened” or “Low Transfer Impedance type” cable.
To maximize performance in keeping the signal in and noise (RFI and EMI) out, the highest possible shielding factor is required. Without making compromises, The DIGI-COUPLER 75 Ohm’s design therefore features a so-called “triaxial construction” which makes use of multiple highest quality shields.
The DIGI-COUPLER 75 Ohm features high purity dense silver coated stranded shields as well as a rugged and hard-wearing jacket made of our HULLIFLEX ® polymer insulation material. All providing an optimal protection against chemical (corrosive) attack from the outside world and ensuring a very long lifespan
