Silicon Laboratories SI4421 Manual do Utilizador descarregar pdf (Página 8)

RF WIRELESS FOUNDATION COURSE BOOK ONE

8 Rev. 0.1

Figure 9. Output Spectrum (CW), if FSK = 0 and mp = 0 (Positive Modulation)

Figure 10. Output Spectrum (CW), if FSK = 1 and mp = 0 (Positive Modulation)

Figure 11. Output Spectrum Modulated by PN9 Random Data

Ref 10 dBm Atten 20 dB

Peak

Log

dB/

W1 S 2

S3 FC

Center 917 MHz

#Res BW 300 Hz VBW 300 Hz

Span 450 kHz

Sweep 20.03 s (401 pts)

– f

FSK

Ref 10 dB m Att en 20 dB

Peak

Log

dB/

W1 S 2

S3 FC

Center 917 MHz

#Res BW 300 Hz VBW 300 Hz

Sp a n 45 0 kH z

S w eep 20 . 03 s (4 01 pt s)

+ f

FSK

Ref 10 dBm Atte n 20 d B

Pea k

Log

dB/

W1 S2

S3 FC

Cente r 91 7 MH z

#Res BW 30 0 Hz VBW 300 Hz

Span 450 k Hz

Swee p 20.03 s (4 01 pts )

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

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Silicon Laboratories SI4421 Manual do Utilizador Página 8