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Optical versus electrical digital audio output
The electrical connection has more bandwidth, typical more than 50MHz and this will
maintain the pulse quality at the receiver end, to reduce jitter.
However there is noise emission from the digital pulses, which potentially can disturb
the video signal or TV/FM receiver. A short cable e.g. less than 75cm and not
crossing the video cables or antenna cables is necessary. Further there can be
problems of disturbancies through the receivers ground plane, which can add new
jitter.
The optical connection has less bandwidth around 10 MHz, but still around 5 times
more than the bit rate of a SPDIF digital audio signal, so that the signal quality is
maintained.
The optical connection is completely free from ground return current and noise
emission. And this will in many cases more than justify the use of a optical
connection in a complicated audio/video system.
If you face any noise problems with an electrical connection then change to an
optical connection.
TECHNICAL SPECIFICATIONS
Analog outputs (only DVD250B)
Analog output voltage, 0 dB
2.2 V phono/ 4.4 V XLR
THD, digital inputs, 0 dB, 24bit/48 kHz:
0.002%
Dynamic range, 24bit , XLR out:
106 dB
Dynamic range, 24 bit, phono out:
104 dB
Frequency response, 20 -20k Hz:
<+/- 0.5 dB
Digital audio output
Electrical
0.5V, 75 ohms Coax
Optical
Toslink type
Video output
Composite:
75 ohms; 0.7V / -0.3V sync
S-video:
75 ohms; 1V,0.7V / -0.3V sync on Y
YCrCb:
75 ohms; 1V,0.7V,0.7V / -0.3V sync on Y
RGB:
75 ohms; 0.7V / use Composite as sync
SCART control (turn on RGB in SCART connector):
5V / 220 ohms
Size (W x D x H), weight:
420mm x 300mm x 90mm, 6.5 kg
Thule Audio ApS reserve the right to alter specifications and design without notice.