AD8367
–20
–25
–30
–35
–40
–45
–50
–55
–60
1.0
0.5
V
g
0
140MHz
V
OUT
–0.5
–1.0
–1.5
–2.0
380MHz
10MHz
70MHz
–20
–15
–10
–5
0
5
10
0
0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040
TIME (Seconds)
POUT (dBm INTO 200Ω)
Figure 40. ACPR vs. Output Power for QPSK Waveform
(QPSK: 4.096 MS/s; α = 0.22; 1 User)
Figure 41. AGC Dynamic Response: 8367 AGC with an External Detector
Table 6. Suggested Component Values for External AGC Detector Circuit
Modulation Type
Rate Sys/s
1.23 M
4 M
24.3 K
100 K
500 K
4 M
C1 (μF)
0.0022
0.0022
0.033
0.015
0.0068
0.0022
C2 (μF)
0.033
0.015
0.68
1.5
0.33
R2 (kΩ)
150
150
150
150
R3 (kΩ)
62
39
51
51
QPSK
QPSK
π/4 DQPSK
64 QAM
64 QAM
150
150
62
100
64 QAM
0.068
Rev. A | Page 18 of 24
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