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dCS 974 User Manual Manual for Software Version 1.0x
dCS Ltd May 2001
Manual part no: DOC1241121A1
Page 102
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
96kS/s Noise Shape Plot
dCS 972 SW v1.54
-60
-54
-48
-42
-36
-30
-24
-18
-12
-6
0
6
12
18
24
30
36
0 4 8 12162024283236404448
Frequency (kHz)
Noise Amplitude relative to No Shaping (dB)
Order 1
Order 2
Order 3
Order 4
Order 5
Order 6
Order 7
Order 8
Order 9
Order 10
3rd or 7th Order Recommended
Figure 46 – 96 kS/s noise shaper curves
Weighted Noise Improvement vs Shaper Order
dCS 972 SW v1.54
-48
-42
-36
-30
-24
-18
-12
-6
0
6
12
18
24
012345678910
Noise Shaper Order
Noise Power (dB rel no shaping)
96 kS/s
88.2kS/s
32 kS/s
44.1 kS/s
48 kS/s
32 kS/s
44.1 kS/s
48 kS/s
88.2kS/s
96 kS/s
Actual Increased Noise
Power (top section)
Perceived (F Weighted)
Noise Power (bottom
section)
Figure 47 – Noise shaper noise and weighted noise vs order