Datasheet

AD8367
Rev. A | Page 18 of 24
380MHz
140MHz
10MHz
70MHz
–20
–60
–55
–50
–45
–40
–35
–30
–25
–20 –15 –10 –5 0 5 10
02710-041
ACPR (dBc)
POUT (dBm INTO 200Ω)
Figure 40. ACPR vs. Output Power for QPSK Waveform
(QPSK: 4.096 MS/s; α = 0.22; 1 User)
1.0
–2.0
–1.5
–1.0
–0.5
0
0.5
0 0.005 0.010 0.015 0.020 0.025 0.030 0.035
V
g
0.040
02710-040
TIME (Seconds)
Vg (V); V
OUT
(arb)
V
OUT
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 C1 (μF) C2 (μF) R2 (kΩ) R3 (kΩ)
QPSK 1.23 M 0.0022 0.033 150 62
QPSK 4 M 0.0022 0.015 150 39
π/4 DQPSK 24.3 K 0.033 0.68 150 51
64 QAM 100 K 0.015 1.5 150 51
64 QAM 500 K 0.0068 0.33 150 62
64 QAM 4 M 0.0022 0.068 150 100