Date printed: 24.01.12
98
D21m System
Input / output impedance 110 Ω
Input sensitivity min. 0.2 V
Output level (into 110 Ω) 3.3 V
SRC range 22-108 kHz
Current consumption (3.3 V) A949.0422: 0.2 A/.0423: 0.4 A/.0424: 0.6 A
(5 V) 0.65 A
Operating temperature 0-40 °C
Input SRC*
Enabled
*
A949.0423 and A949.0424 only
A949.0424 only (see Note 1)
Ch 1
Ch 2
Ch 3
Ch 4
Ch 5
Ch 6
Ch 7
Ch 8
Output Word Length**
24 Bit 20 Bit
18 Bit 16 Bit
Output Sampling Rate**
Ch 4
Ch 3
Ch 8
Ch 7
Ch 6
Ch 5
Ch 2
Ch 1
Ch 5...8
Ch 1...4
Ch 5...8
96 k Ext.
Bypassed
Enabled
Ch 1...4
48 k 44.1 k
LEDs LOCK 1-8 These green LEDs are on if a valid AES/EBU signal is available at the inputs.
Jumpers Output Word Length (A949.0424 only) Used to set the resolution (output word length) for outputs
1-8.
Please note that for a word length reduction the output SRCs must be set to
Enabled; if so, the output word length is always 21 bit maximum. Whenever
an SRC is enabled, the three least significant bits (LSB) are set to digital zero.
This results in the specified dynamic range of 120 dB.
Input SRC (A949.0423 and A949.0424 only) Enabling or bypassing of the SRCs for
individual AES/EBU input channels.
Output Sampling Rate (A949.0424 only) The output sampling rate may be set for the AES/EBU
output channel groups 1-4 and 5-8; selection from 44.1 kHz, 48 kHz, 96 kHz,
or synchronized by the signal at the AES EXT SYNC IN connector (see
‘Note’ above).
If no valid signal is provided at the AES EXT SYNC IN connector but Ext. is
selected, the output sampling rate will be set to the system clock. Outputs set
to Ext. can therefore be used in a very flexible way: Connect no external sync
signal, if not necessary, so that the output will be clocked with the internal
system clock. As soon as an external sync signal is provided to the AES EXT
SYNC IN connector, the output will be clocked with the ext. sync signal.
Output SRC / WL Reduction (A949.0424 only) Enabling/bypassing of the output SRCs, separate for the
AES/EBU output channel groups 1-4 and 5-8. Please note that for word
length reduction the output SRCs must be set to Enabled.
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