DCS Computer Hardware dCS 974 Benutzerhandbuch
dCS 974 User Manual
Manual for Software Version 1.0x
dCS Ltd
May 2001
Manual part no: DOC1241121A1
Page 75
Document No: OS-MA-A0124-112.1A1
Contact
dCS
on + 44 1799 531 999
email to: more@dcsltd.co.uk
(inside the UK replace + 44 with 0)
web site: www.dcsltd.co.uk
Noise
Noise arises from processing rounding errors, and from stop band performance.
It is typically around –130dB0, but depends on the conversion being used.
It is typically around –130dB0, but depends on the conversion being used.
Group Delay
The conversion process takes time, and the time is dependent on the
conversion being carried out, and the filters used. Typical values in
microseconds are given for four conversions in the table below.
conversion being carried out, and the filters used. Typical values in
microseconds are given for four conversions in the table below.
Group Delay (
µµµµs)
Sample Period (
µµµµs)
Conversion
Filter
1
Filter
2
Filter
3
Filter
4
Input
Output
44.1k
⇒
⇒
⇒
⇒ 96k
1141
1131
1131
1131
22.676
10.417
88.2k
⇒
⇒
⇒
⇒ 44.1k
1024
11.338
22.676
96k
⇒
⇒
⇒
⇒ 44.1k
1515
1065
1065
1065
10.417
22.676
96k
⇒
⇒
⇒
⇒ 48k
868
958
1028
948
10.417
20.833
Table 7 – Group Delays, PCM to PCM transitions