Analog Devices AD9739 Manual page 20

AD9739
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
0 100 200 300
Figure 52. Single-Carrier DOCSIS ACLR Spectral Plot @ 825 MHz (DOCSIS SPEC
(Red Line) Is 73 dBc ; Harmonic Exception Is 63 dBc)
CENTER 817.2MHz
#RES BW 30kHz
FREQ
RMS RESULTS
OFFSET
(MHz)
CARRIER POWER
3.375
–17.35dBm/
6.375
6MHz
Figure 53. Single-Carrier DOCSIS Close-in ACLR Plot @ 825 MHz
(Two Closest Channels)
CENTER 817.20GHz
#RES BW 30kHz
FREQ
RMS RESULTS
OFFSET
CARRIER POWER (MHz)
3.375
–17.39dBm/
6.375
6MHz
12.00
18.00
Figure 54. Single-Carrier DOCSIS Close-in ACLR Plot @ 825 MHz
400 500 600 700 800 900
f
(MHz)
OUT
SPAN 18MHz
SWEEP 58.4ms (601pts)
VBW 300kHz
REF
BW LOWER UPPER
(MHz) (dBc) (dBm) (dBc) (dBm)
750 –74.94 –92.28 –73.72 –91.07
5.25 –75.03 –92.38 –75.21 –92.56
SPAN 42MHz
SWEEP 136.2ms (601pts)
VBW 300kHz
REF
BW LOWER UPPER
(MHz) (dBc) (dBm) (dBc) (dBm)
750 –72.21 –89.60 –71.78 –89.17
5.25 –75.11 –92.50 –75.07 –92.46
6 –78.15 –95.55 –78.07 –95.46
6 –78.26 –95.65 –78.14 –95.53
0
–10
–20
–30
–40
–50
–60
–70
–80
1000 0
Figure 55. Four-Carrier DOCSIS ACLR Spectral Plot @ 91 MHz (DOCSIS SPEC
CENTER 107.1MHz
#RES BW 30kHz
RMS RESULTS
CARRIER POWER
–20.06dBm/
6MHz
Figure 56. Four-Carrier DOCSIS Close-in ACLR Plot @ 91 MHz
CENTER 107.1MHz
#RES BW 30kHz
RMS RESULTS
CARRIER POWER
–20.03dBm/
6MHz
Figure 57. Single-Carrier DOCSIS Close-in ACLR Plot @ 91 MHz
Rev. A | Page 20 of 56
100 200 300 400 500 600
f
(MHz)
OUT
(Red Line) Is 67 dBc; Harmonic Exception Is 61 dBc)
SWEEP 58.4ms (601pts)
VBW 300kHz
FREQ REF
OFFSET BW LOWER
(MHz) (MHz) (dBc) (dBm)
3.375 750 –10.59 –30.65
6.375 5.25 –0.11 –20.17
(Two Closest Channels)
SWEEP 136.2ms (601pts)
VBW 300kHz
FREQ REF
OFFSET BW LOWER
(MHz) (MHz) (dBc) (dBm)
3.375 750 –10.02 –30.84
6.375 5.25 –0.15 –20.17
12.00 6 0.26 –19.76
18.00 6 –0.07 –20.10
700 800 900 1000
SPAN 18MHz
UPPER
(dBc) (dBm)
–76.34 –96.40
–74.41 –94.47
SPAN 42MHz
UPPER
(dBc) (dBm)
–76.21 –96.24
–74.60 –94.63
–76.30 –96.32
–76.06 –96.09