Analog Devices ADF7021-V Manual page 18

ADF7021-V
10
0
–10
–20
–30
–40
–50
–60
–70
–80
867.97 867.98 867.99
FREQUENCY (MHz)
Figure 17. Output Spectrum in 2FSK and Raised Cosine 2FSK Modes
10
0
–10
–20
–30
–40
–50
–60
–70
–80
867.97 867.98 867.99
FREQUENCY (MHz)
Figure 18. Output Spectrum in 3FSK and Raised Cosine 3FSK Modes
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
867.94 867.96 867.98
FREQUENCY (MHz)
Figure 19. Output Spectrum in 4FSK and Raised Cosine 4FSK Modes
DATA RATE = 9.6kbps
DATA = PRBS9
f
= 2.4kHz
DEV
RF FREQ = 868MHz
2FSK
RC2FSK
868.00 868.01 868.02 868.03
DATA RATE = 9.6kbps
DATA = PRBS9
f
= 2.4kHz
DEV
RF FREQ = 868MHz
3FSK
RC3FSK
868.00 868.01 868.02 868.03
DATA RATE = 9.6kbps
DATA = PRBS9
f
= 2.4kHz
DEV
RF FREQ = 868MHz
4FSK
RC4FSK
868.00 868.02 868.04 868.06
RAMP RATE:
10
CW ONLY
256 CODES/BIT
128 CODES/BIT
0
64 CODES/BIT
32 CODES/BIT
–10
–20
–30
–40
–50
–60
–100
Figure 20. Output Spectrum in Maximum Hold
0
–1
–2
–3
–40°C, 2.3V
–4 –40°C, 3V
–40°C, 3.6V
+25°C, 2.3V
–5
+25°C, 3V
+25°C, 3.6V
+85°C, 2.3V
–6
+85°C, 3V
+85°C, 3.6V
–7
–125 –123 –121 –119 –117 –115 –113 –111 –109 –107 –105
Figure 21. 2FSK Sensitivity vs. V
0
–1
–2
–3
–4
–5
–6
–7
–127 –125
Figure 22. 2FSK Sensitivity vs. V
Rev. 0 | Page 18 of 60
TRACE = MAX HOLD
PA ON/OFF RATE = 3Hz
PA ON/OFF CYCLES = 10,000
V = 3.0V
DD
–50 0
FREQUENCY OFFSET (kHz)
for Various PA Ramp Rate Options
DATA RATE = 2.4kbps
f = 4.8Hz
DEV
RF FREQ = 868MHz
IFBW = 9kHz
RF INPUT POWER (dBm)
and Temperature at 868 MHz
DD
DATA RATE = 1.2kbps
f = 2.4Hz
DEV
RF FREQ = 460MHz
IFBW = 9kHz
–40°C, 2.3V
–40°C, 3V
–40°C, 3.6V
+25°C, 2.3V
+25°C, 3V
+25°C, 3.6V
+85°C, 2.3V
+85°C, 3V
+85°C, 3.6V
–123 –121 –119 –117 –115
RF INPUT POWER (dBm)
and Temperature at 460 MHz
DD
50 100
–113 –111