Pentek 6230 Operating Manual page 95

0
ENCODE = 65MSPS
–10
AIN = 2.2MHz @ –1dBFS
SNR = 74.5dB
–20
SFDR = 92dBc
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0 5 10
FREQUENCY – MHz
Figure 8. Single Tone at 2.2 MHz
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0 5 10
FREQUENCY – MHz
Figure 9. Single Tone at 15.5 MHz
0
ENCODE = 65MSPS
–10
AIN = 30MHz @ –1dBFS
SNR = 73.5dB
–20
SFDR = 85dBc
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
5 10
0
FREQUENCY – MHz
Figure 10. Single Tone at 30 MHz
REV. 0
Typical Performance Characteristics–
15 20 25 30
ENCODE = 65MSPS
AIN = 15.5MHz @ –1dBFS
SNR = 74dB
SFDR = 90dBc
15 20 25 30
15 20 25 30
75.0
74.5
74.0
T = 85 C
73.5
73.0
72.5
72.0
5
0
Figure 11. Noise vs. Analog Frequency (Nyquist)
94
92
90
T = 25 C,
88
86
84
82
80
5
0
ANALOG INPUT FREQUENCY – MHz
Figure 12. Harmonics vs. Analog Frequency (Nyquist)
75
74
73
72
PHASE NOISE OF ANALOG SOURCE
71
DEGRADES PERFORMANCE
70
69
68
10 20 30
0
ANALOG FREQUENCY – MHz
Figure 13. Noise vs. Analog Frequency (IF)
–9–
AD6644
ENCODE = 65MSPS, AIN = –1dBFS
TEMP = –25 C, 25 C, 85 C
T = –25 C
T = 25 C
10 15 20 25
FREQUENCY – MHz
ENCODE = 65MSPS, AIN = –1dBFS
TEMP = 25 C, 25 C, 85 C
T = 25 C
85 C
10 15 20 25
LOW NOISE ANALOG SOURCE
AIN = –1dBFS
ENCODE = 65MSPS
40 50 60 70 80 90
30
30
100