Atec Rohde-Schwarz-CMW500 - Manual (Page 21)

Version 11.00, May 2013
Rohde & Schwarz R&S ® CMW500 Wideband Radio Communication Tester 21
Signal quality
Phase error GMSK
with the R&S
® CMW-KW200 option,
waveform file used: GSM_GMSK.WV
< 1°, RMS
< 4°, peak
Error vector magnitude (EVM) 8PSK
with the R&S
® CMW-KW200 option,
waveform file used: GSM_EDGE.WV
< 2 %, RMS
16QAM / 32QAM level A
with the R&S
® CMW-KW200 and
R&S ® CMW-KW201 options,
waveform file used:
EDGE_EVO_16QAM_A.WV
< 2 %, RMS
QPSK / 16QAM / 32QAM level B
with the R&S
® CMW-KW200 and
R&S ® CMW-KW201 options,
waveform file used:
EDGE_EVO_32QAM_B.WV
< 2 %, RMS
GSM RF analyzer (R&S ® CMW-KM200 option) and GSM EDGE EVO A analyzer
(R&S ® CMW-KM201 option)
Frequency range GSM450 band 450 MHz to 458 MHz
GSM480 band 478 MHz to 486 MHz
GSM750 band 777 MHz to 792 MHz
GSM850 band 824 MHz to 849 MHz
GSM900 band 876 MHz to 915 MHz
GSM1800 band 1710 MHz to 1785 MHz
GSM1900 band 1850 MHz to 1910 MHz
Trigger
Trigger sources BASE: external TRIG A,
BASE: external TRIG B,
GPRF: BB generator,
GSM: free run,
GSM: IF power,
GSM: acquisition
Modulation analysis
Level range –28 dBm to +42 dBm 9
Analysis mode with the R&S ® CMW-KW200 option GMSK, 8PSK
with the R&S ® CMW-KW200 and
R&S ® CMW-KW201 options
GMSK, 8PSK, 16QAM (level A)
Inherent phase error GMSK < 0.6°, RMS
< 2°, peak
Inherent error vector magnitude
(inherent EVM) 8PSK, 16QAM (level A) < 0.8 %, RMS
Frequency measurement uncertainty < 20 Hz + drift of timebase,
see general technical specifications
Inherent I/Q offset < –50 dB
Filter GMSK bandpass, 900 kHz, RRC filter, α = 0.16
8PSK, 16QAM (level A) windowed raised-cosine filter in line with
3GPP TS 45.005
Burst power measurement
Level uncertainty bandpass, 900 kHz, RRC filter, α = 0.16 see general technical specifications
9 The maximum permissible continuous power is +34 dBm due to thermal limits.