ECdesigns PowerDAC-B, Руководство пользователя

Страница: 13 / 15

© 1990-2022 - All Rights Reserved - ECdesigns
https://www.ecdesigns.nl
/ 13 15
ElectroTos
“New” digital audio interface
Backwards compatible with Toslink interface and S/PDIF protocol. Our “new” electro-optical digital audio
interface eliminates -unwanted- jitter in digital audio source, digital audio interlink, and all DAC circuits even
when significant crosstalk is present.
This new digital audio interface maintains low noise and low jitter. It can be used to improve the sound quality of
all existing Toslink DACs. The transmitter side (digital audio source) is connected to a coaxial cable through a
RCA connector. At the end of the coaxial cable there is an optical connector compatible with the Toslink input
on the DAC. So this is a combination of an electrical interface (low jitter) and an optical interface (low noise,
elimination of ground loops). The required signal level is higher compared to existing coaxial S/PDIF interlinks,
so a suitable translator or source are required. We o
ff er a USB to ElectroTos translator that outputs ElectroTos.
ElectroTos can operate with standard S/PDIF protocol (compatible with existing DACs)
This measurement compares a high quality Toslink
interlink (top) and the “new” ElectroTos interlink
(bottom). The signal is measured inside the DAC at the
Toslink optical receiver chip output. sample rate equals
96 KHz, standard S/PDIF protocol.
The Toslink optical fibre interlink causes time distortion
(jitter). This is visible as unsharp and not clearly
defined vertical green lines (X-shape on this picture).
This Toslink jitter problem is well known.
The new ElectroTos interlink o ff ers significantly lower
time distortion (jitter). This is visible as sharp, clearly
defined vertical lines (X-shape in this picture). Good
coaxial S/PDIF interfaces can o
ff er similar low jitter, but
fail to block RF ground loop noise and very large
bandwidth noise in general.
ElectroTos o ff ers low jitter, blocks RF ground loop
noise and o ff ers a clean, band-limited output signal.
Below you can see two oscilloscope screen captures