R&S CMU200 tranning 教材

CMU Training GSM MS 04-03Universal Radio Communication Tester

CMU Application Engineers Training 04-03

Page 1

1CM2-TL / April 2003

Universal Radio Communication Tester

CMU Application Engineers Training 04-03

Page 2

1CM2-TL / April 2003

GSM Basics
GMSK GMSKmodulation modulation

Bit 1 0 1

Rotation -π π

Symbol rate 270,833 kBits/s + one quarter of circle for each bit = 67,70825 kHz).

CMU Application Engineers Training 04-03

Page 3

1CM2-TL / April 2003

GSM Basics
GSM GSM900 900Power PowerControl Control
Power Control Level (PCL) 0-2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Reference Level 39 dBm 37 dBm 35 dBm 33 dBm 31 dBm 29 dBm 27 dBm 25 dBm 23 dBm 21 dBm 19 dBm 17 dBm 15 dBm 13 dBm 11 dBm 9 dBm 7 dBm 5 dBm Power Class 1 ± 2 dB ± 3 dB ± 3 dB ± 3 dB ± 3 dB ± 3 dB ± 3 dB ± 3 dB ± 3 dB ± 3 dB ± 3