Справочник Пользователя для DCS ANALOGUE TO DIGITAL CONVERTER dCS 904
dCS 904 User Manual
Manual for Software Version 1.5x and 1.36
dCS Ltd
June 2000
Manual part no: DOC135904 iss 2B2
Page 35
135904ma2b2.pdf file available from website
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dCS
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Integrated Q Noise for DSD Filters
normalised for Full Scale DSD at 0dB
-180.00
-160.00
-140.00
-120.00
-100.00
-80.00
-60.00
-40.00
-20.00
0.00
20.00
1
10
100
1000
Frequency (kHz)
In
te
gr
at
ed
Q
N
oi
se P
ow
er
(
dB
)
F1
F2
F3
F4
F5
F6
F7
F2
F3
F4
F5
F6
F7
Figure 13 – DSD output, Filter responses (Integrated Q Noise)
Spot Q Noise for DSD Filters, F Weighted
in 400 Hz bandwidth
-280
-260
-240
-220
-200
-180
-160
-140
-120
-100
-80
0.1
1
10
100
1000
Frequency (kHz)
Q No
is
e r
el
F
ul
l Sc
al
e DSD (
dB)
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
20
F
w
e
ig
ht
in
g
(d
B
)
F1
F2
F3
F4
F5
F6
F7
F weighting curve
(right hand scale)
(right hand scale)
Figure 14 – DSD output, Filter responses (F weighted Spot Q Noise)