Analog Devices AD9776 Instruction Manual page 18

AD9776/AD9778/AD9779
REF –25.28dBm *ATTEN 4dB
*AVG
Log
10dB/
PAVG
10
W1 S2
CENTER 143.88MHz
*RES BW 30kHz VBW 300kHz
RMS RESULTS
FREQ OFFSET REF BW
CARRIER POWER 5.000MHz 3.840MHz
–12.49dBm/ 10.00MHz 3.840MHz
3.84000MHz 15.00MHz 3.840MHz
Figure 29. AD9779 WCDMA Signal, 4× Interpolation,
f =122.88 MSPS, f
DATA
–55
–60
–65
–70
–75
–6dBFS
–80
–85
0dBFS
–90
0 20 40 60 80 100 120 140 160 180 200 220 240
Figure 30. AD9779 ACLR for Third Adjacent Band WCDMA, 4× Interpolation,
f = 122.88 MSPS, On-Chip Modulation Translates Baseband Signal to IF
DATA
–55
–60
–65
–70
–75
–6dBFS
–80
–85
0dBFS
–90
0 20 40 60 80 100 120 140 160 180 200 220 240
Figure 31. AD9779 ACLR for Second Adjacent Band WCDMA, 4×
Interpolation, f = 122.88 MSPS. On-Chip Modulation Translates
DATA
Baseband Signal to IF
EXT REF
SPAN 50MHz
SWEEP 162.2ms (601 pts)
LOWER UPPER
dBc dBm dBc dBm
–76.75 –89.23 –77.42 –89.91
–80.94 –93.43 –80.47 –92.96
–79.95 –92.44 –78.96 –91.45
/4 Modulation
DAC
0dBFS – PLL ON
–3dBFS
260
f
(MHz)
OUT
0dBFS – PLL ON
–3dBFS
260
f
(MHz)
OUT
REF –30.28dBm
*AVG
Log
10dB/
PAVG
10
W1 S2
CENTER 151.38MHz
*RES BW 30kHz
TOTAL CARRIER POWER –12.61dBm/15.3600MHz
REF CARRIER POWER –17.87dBm/3.84000MHz
FREQ OFFSET
1 –17.87dBm 5.000MHz
2 –20.65dBm 10.00MHz
3 –18.26dBm 15.00MHz
4 –18.23dBm
Figure 32. AD9779 Multicarrier WCDMA Signal, 4× Interpolation,
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
0 2k
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
Rev. 0 | Page 18 of 56
*ATTEN 4dB
VBW 300kHz SWEEP 162.2ms (601 pts)
LOWER
INTEG BW dBc dBm dBc
3.840MHz –67.70 –85.57 –67.70
3.840MHz –70.00 –97.87 –69.32
–71.00
3.840MHz –71.65 –99.52
f =122.88 MSPS, f /4 Modulation
DAC DAC
4k 6k 8k 10k 12k 14k
CODE
Figure 33. AD778 Typical INL
2k 4k 6k 8k 10k 12k
CODE
Figure 34. AD9778 Typical DNL
EXT REF
SPAN 50MHz
UPPER
dBm
–85.57
–87.19
–88.88
16k 18k 20k
14k 16k 18k