Atec Rohde-Schwarz-CMW500 - Manual (Page 48)

Version 11.00, May 2013
48 Rohde & Schwarz R&S ® CMW500 Wideband Radio Communication Tester
Modulation analysis
Bandwidth 20 MHz, 40 MHz, 80 MHz
Level range –28 dBm to +42 dBm 33
Payload length ≥ 16 symbol or
Analysis modes BPSK code rate 1/2 (MCS0),
BPSK code rate 3/4,
QPSK code rate 1/2 (MCS1),
QPSK code rate 3/4 (MCS2),
16QAM code rate 1/2 (MCS3),
16QAM code rate 3/4 (MCS4),
64QAM code rate 1/2,
64QAM code rate 2/3 (MCS5),
64QAM code rate 3/4 (MCS6),
64QAM code rate 5/6 (MCS7)
256QAM code rate 3/4 (MCS8)
256QAM code rate 5/6 (MCS9)
Measured parameters
numeric results and standard deviation burst power,
EVM all carriers,
EVM data carriers,
EVM pilot carriers,
center frequency error,
symbol clock error,
I/Q offset
graphical EVM versus symbol,
spectrum flatness,
I/Q constellation,
transmit spectrum mask
Error vector magnitude (EVM)
Inherent EVM 34 IEEE 802.11ac (5 GHz band)
–18 dBm ≤ input level ≤ +42 dBm 33 ,
RMS
< –38 dB, RMS 35
Measurement length entire PPDU
Center frequency error
Frequency measurement uncertainty IEEE 802.11ac (5 GHz band),
for ≥ 100 symbol (400 µs) < 35 Hz + drift of timebase,
see general technical specifications
Symbol clock error
Uncertainty < 1 ppm
I/Q offset
Inherent I/Q offset for average ≥ 10 measurements < –45 dB
Spectrum flatness
Level uncertainty IEEE 802.11ac (5 GHz band)
bandwidth 20 MHz < 0.8 dB
bandwidth 40 MHz < 1.0 dB
bandwidth 80 MHz < 1.0 dB
Spectrum measurements
Transmit spectrum mask
Frequency span 320 MHz
Dynamic range in line with IEEE 802.11ac
Expected nominal power setting for full
dynamic range RF1 COM, RF2 COM
IEEE 802.11ac (5 GHz band) +12 dBm to +42 dBm 33
33 The maximum permissible continuous power is +34 dBm due to thermal limits.
34 Measured with channel estimation based on payload.
35 3 dB less with R&S ® CMW-H590D RF frontend (ADV.).