Pentek 6210 Operating Manual page 119

0
20
40
60
80
100
120
dc 6.5 13.0
FREQUENCY – MHz
Figure 13. Two Tones at 15.0 MHz & 16.0 MHz
100
90
80
70
ENCODE = 65MSPS
60
AIN = 31.0MHz
50
40
dBc
30
20
10
0
–80 –70 –60 –50
ANALOG INPUT POWER LEVEL – dBFS
Figure 14. Single Tone SFDR
100
90
dBFS
80
70
ENCODE = 65MSPS
60
F1 = 15.0MHz
F2 = 16.0MHz
50
40
30
20
10
0
–80 –70 –60 –50
INPUT POWER LEVEL (F1 = F2) – dBFS
Figure 15. Two Tone SFDR
REV. 0
ENCODE = 65MSPS
AIN = 15.0, 16.0MHz
NO DITHER
19.5 26.0 32.5
dBFS
SFDR = 80dB
REFERENCE LINE
–40 –30 –20 –10 0
dBc
SFDR = 80dB
REFERENCE LINE
–40 –30 –20 –10 0
85
WORST SPUR
80
75
70
65
60
dc 8 16 24
Figure 16. SNR, Worst Spurious vs. Encode
90
85
80
75
70
65
60
55
50
45
40
35
30
25 30 35 40
Figure 17. SNR, Worst Spurious vs. Duty Cycle
90
85
2.2MHz
80
75
70
2.2MHz
65
60
69MHz
55
50
45
40
35
30
–15 –12 –9
Figure 18. SNR, Worst Spurious vs. Encode Power
–9–
AD6640
AIN = 19.5MHz
SNR
32 40 48 56 64 72
SAMPLE RATE – MSPS
ENCODE = 65MSPS
AIN = 2.2MHz
WORST SPUR
SNR
45 50 55 60 65 70
ENCODE DUTY CYCLE – %
ENCODE = 65MSPS
WORST SPUR
69MHz
SNR
–6 –3 0 3 6 9 12
ENCODE POWER – dBm
80
75
15