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Verfügbare Sprachen
Verfügbare Sprachen
The digital input signals from either of three pos-
sible inputs are fed to a receiver chip, specially
designed for these kinds of signals.
Its task is to transform the incoming data words to
a standard suitable to the following circuitry. The
receiver scans the data at 64-times oversampling.
Furthermore, it determines a sampling rate for in-
ternal processing of the digital signals.
The transformed signal is fed to a digital filter
With 20-bit input and 22-bit output width, operating
at 8-times oversampling. Its stopband rejec-tion
exceeds 100 dB.
After filtering, the actual D-to-A conversion is pro-
cessed. The converter chip is divided into left and
right channel, with 20 bit input width. Internally, it
consists of two symmetrically operating 19-bit con-
verters with output summing.
TECHNICAL DATA DAC F28
(all Measurements RMS unweighted, 20 Hz ... 20 kHz, relative to full scale output)
Digital Inputs
Digital Output
Digital Input Format
Sampling-Rate Displays
Status Displays
Dynamic
THD+N (-20 dB)
THD+N (-60 dB
Crosstalk (15 kHz)
Frequency Range (-0.1 dB)
Analog Outputs
Output Impedance
Analog Output Level
Default Settings
Powersupply
Dimensions
- AES/EBU, x-balanced, Impedance 110 Ohm, according to AES 3-1992
- S/P-DIF, coaxial, Impedance 75 Ohm, according to IEC )%(
- S/P-DIF, optical, accordeing to EIAJ RC-5720
- AES/EBU, x-balanced, Impedance 110 Ohm, according to AES 3-1992
AES/EBU and S/P-DIF
32, 44.1, 48 kHz and variable
Error, Professional, Consumer, Emphasis
> 110 dB
< -88 dB
< -48 dB
-100 dB
10 Hz ... 20 kHz
- XLR, electr. balanced, accordig to AES 14-1992
- Cinch, unbalanced, according to IEC 958
< 50 Ohm
0 ... +20 dBu (adjustable)
AES/EBU input activ after power up
230 / 115 Volt AC, 15 Watt via IEC-CEE Plug
483 * 44 * 165 (WxHxD)
Due to massive oversampling, the digital noise sig-
nals are of very high frequency in comparison with
the analog audio signal. Therefore, there is no
need for sophisticated low-pass filtering of the con-
verted signal. The filter used is three-pole GIC ty-
pe. This design has no capacitors within the signal
path and has proven convenient and natural soun-
ding in comparison with other filter designs during
listening tests.
The filter feeds the analog signals to the trimpot le-
vel control and the output stages. In standard ver-
sion, these are electronically balanced. Transfor-
mer balancing is available as an option.
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