Atec Rohde-Schwarz-CMW500 - Manual (Page 64)

Version 11.00, May 2013
64 Rohde & Schwarz R&S ® CMW500 Wideband Radio Communication Tester
Statistics
Statistical count 1 to 1000
Values current, average, minimum/maximum,
standard deviation
Trigger
Trigger sources BASE: external TRIG A,
BASE: external TRIG B,
GPRF: BB generator,
1xEV-DO: free run
Modulation analysis
Filter 1.23 MHz, RRC, α = 0.22, CDMA filter
Level range –28 dBm to +42 dBm 49
Analysis modes dual BPSK
Multicarrier single carrier or 3 carriers within –8 MHz
to +8 MHz
Measured parameters numeric results and standard deviation error vector magnitude (EVM),
magnitude error (ME),
phase error (PE),
frequency error,
rho,
carrier feedthrough,
I/Q imbalance,
power,
wideband power (8 MHz for single carrier
or 16 MHz for multicarrier),
narrowband power (1.23 MHz)
graphical EVM versus time,
ME versus time,
PE versus time
Waveform quality (rho)
Uncertainty for rho 0.9 to 1 < 0.003
Measurement length half-slot 1024 chip (833.33 µs)
Error vector magnitude (EVM)
Measurement range up to 25 %, RMS
Inherent EVM < 2.5 %, RMS
Measurement length half-slot 1024 chip (833.33 µs)
Frequency error
Measurement range ±3 kHz
Frequency measurement uncertainty < 20 Hz + drift of timebase,
see general technical specifications
Carrier feedthrough
Inherent carrier feedthrough for average ≥ 10 measurements < –55 dB
I/Q imbalance
Inherent I/Q imbalance < –50 dB
49 The maximum permissible continuous power is +34 dBm due to thermal limits.