Analog Devices AD9739 Manual page 21

0
–10
–20
–30
–40
–50
–60
–70
–80
0 100 200 300 400
Figure 58. Four-Carrier DOCSIS ACLR Spectral Plot @ 325 MHz (DOCSIS SPEC
(Red Line) Is 67 dBc ; Harmonic Exception Is 6 1dBc)
CENTER 334.38MHz
#RES BW 30kHz
VBW 300kHz
FREQ REF
RMS RESULTS
OFFSET BW
(MHz) (MHz)
CARRIER POWER
3.375 750
–21.65dBm/
6.375 5.25
6MHz
Figure 59. Four-Carrier DOCSIS Close-in ACLR Plot @ 325 MHz
(Two Closest Channels)
CENTER 334.38MHz
#RES BW 30kHz
VBW 300kHz
FREQ REF
RMS RESULTS
OFFSET BW
CARRIER POWER (MHz) (MHz)
3.375 750
–21.64dBm/
6.375 5.25
6MHz
12.00 6
18.00 6
Figure 60. Single-Carrier DOCSIS Close-in ACLR Plot @ 325 MHz
500 600 700 800 900 1000
f
(MHz)
OUT
SPAN 18MHz
SWEEP 58.4ms (601pts)
LOWER UPPER
(dBc) (dBm) (dBc) (dBm)
–11.42 –33.06 –77.13 –98.78
–0.95 –22.60 –74.38 –96.03
SPAN 42MHz
SWEEP 136.2ms (601pts)
LOWER UPPER
(dBc) (dBm) (dBc) (dBm)
–11.36 –33.00 –76.78 –98.42
–0.97 –22.61 –74.43 –96.07
–0.77 –22.41 –74.39 –96.03
–0.49 –22.13 –74.57 –96.21
0
–10
–20
–30
–40
–50
–60
–70
–80
0 100
Figure 61. Four-Carrier DOCSIS ACLR Spectral Plot @ 825 MHz (DOCSIS SPEC
(Red Line) Is 67 dBc ; Harmonic Exception Is 61 dBc)
CENTER 829.23MHz
#RES BW 30kHz
RMS RESULTS
CARRIER POWER
–22.94dBm/
6MHz
Figure 62. Four-Carrier DOCSIS Close-in ACLR Plot @ 825 MHz
CENTER 829.23MHz
#RES BW 30kHz
RMS RESULTS
CARRIER POWER
–20.03dBm/
6MHz
Figure 63. Single-Carrier DOCSIS Close-in ACLR Plot @ 825 MHz
Rev. A | Page 21 of 56
200 300 400 500 600 700
f
(MHz)
OUT
SWEEP 58.4 (601pts)
VBW 300kHz
FREQ REF
OFFSET BW LOWER UPPER
(MHz) (MHz) (dBc) (dBm) (dBc)
3.375 750 –10.59 –33.90 –76.89
6.375 5.25 –0.27 –23.22 –72.84
(Two Closest Channels)
SWEEP 136.2ms (601pts)
VBW 300kHz
FREQ REF
OFFSET BW LOWER UPPER
(MHz) (MHz) (dBc) (dBm) (dBc)
3.375 750 –11.04 –33.85 –77.66
6.375 5.25 –0.40 –23.21 –72.77
12.00 6 0.02 –22.79 –71.91
18.00 6 –0.17 –22.98 –71.95
AD9739
800 900 1000
SPAN 18MHz
(dBm)
–99.83
–95.78
SPAN 42MHz
(dBm)
–100.47
–95.57
–94.71
–94.76