Atec Rohde-Schwarz-CMW500 - Manual (Page 57)

Version 11.00, May 2013
Rohde & Schwarz R&S ® CMW500 Wideband Radio Communication Tester 57
Modulation analysis
Filter 1.28 MHz, RRC, α = 0.22, TD-SCDMA
filter
Level range –28 dBm to +42 dBm 43
Analysis modes TD-SCDMA uplink QPSK, DPCH,
QPSK, DPCH + HSDPA,
16QAM, DPCH + HSUPA
Measured parameters numeric results and standard deviation error vector magnitude (EVM),
magnitude error (ME),
phase error (PE),
frequency error,
I/Q origin offset,
I/Q imbalance,
UE power
graphical EVM versus time,
ME versus time,
PE versus time
Error vector magnitude (EVM)
Measurement range up to 25 %, RMS
Inherent EVM < 2.5 %, RMS
Measurement length 1 slot, multislot (1 to 112)
Frequency error
Measurement range ±3 kHz
Frequency measurement uncertainty < 20 Hz + drift of timebase,
see general technical specifications
I/Q origin offset
Inherent I/Q offset for average ≥ 10 measurements < –55 dB
I/Q imbalance
Inherent I/Q imbalance < –50 dB
Code domain
Filter 1.28 MHz, RRC, α = 0.22, TD-SCDMA
filter
Level range –28 dBm to +42 dBm 43
Analysis modes TD-SCDMA uplink QPSK, DPCH,
QPSK, DPCH + HSDPA,
16QAM, DPCH + HSUPA
Measured parameters numeric results and standard deviation code domain error (CDE)
graphical code domain power versus code
Code domain power versus code
Uncertainty < 0.4 dB
Measurement length 1 slot
Code domain error (CDE)
Uncertainty < 0.4 dB
Measurement length 1 slot
Spectrum measurements
Adjacent channel leakage ratio RMS detector
Filter 1.28 MHz, RRC, α = 0.22, TD-SCDMA
filter
Dynamic range first adjacent channel at ±1.6 MHz > 53 dB
second adjacent channel at ±3.2 MHz > 61 dB
Expected nominal power setting for full
dynamic range RF1 COM, RF2 COM –3 dBm to +42 dBm 44
43 The maximum permissible continuous power is +34 dBm due to thermal limits.