Atec Rohde-Schwarz-CMW500 - Manual (Page 44)

Version 11.00, May 2013
44 Rohde & Schwarz R&S ® CMW500 Wideband Radio Communication Tester
Error vector magnitude (EVM)
Inherent EVM 24 DSSS, IEEE 802.11b/g < 5 %, peak
< 2 %, RMS
OFDM, IEEE 802.11g < –40 dB, RMS
OFDM, IEEE 802.11a
–18 dBm ≤ input level ≤ +42 dBm 25 ,
RMS
< –40 dB, RMS 26
Measurement length DSSS 1000 samples
OFDM entire PPDU
Center frequency error
Frequency measurement uncertainty DSSS, IEEE 802.11b/g < 20 Hz + drift of timebase,
see general technical specifications
OFDM, IEEE 802.11g, for ≥ 100 symbol
(400 μs) < 20 Hz + drift of timebase,
see general technical specifications
OFDM, IEEE 802.11a, for ≥ 100 symbol
(400 μs) < 35 Hz + drift of timebase,
see general technical specifications
Chip clock error DSSS
Uncertainty < 1 ppm
Symbol clock error OFDM
Uncertainty < 1 ppm
I/Q offset
Inherent I/Q offset DSSS, for average ≥ 10 measurements < –50 dB
OFDM, for average ≥ 10 measurements < –45 dB
Spectrum flatness
Level uncertainty OFDM, IEEE 802.11g (2.4 GHz band) < 0.5 dB
OFDM, IEEE 802.11a (5 GHz band) < 0.8 dB
Spectrum measurements
Transmit spectrum mask
Frequency span 80 MHz
Dynamic range DSSS in line with IEEE 802.11b
OFDM in line with IEEE 802.11a/g
Expected nominal power setting for full
dynamic range RF1 COM, RF2 COM
IEEE 802.11g (2.4 GHz band) +2 dBm to +42 dBm 25
IEEE 802.11a (5 GHz band) +12 dBm to +42 dBm 25
WLAN N RF analyzer (R&S
®
CMW-KM651 option)
Frequency range WLAN IEEE 802.11n (2.4 GHz band) 2412 MHz to 2484 MHz
WLAN IEEE 802.11n (5 GHz band),
prerequisite: R&S
® CMW-KB036 option
5000 MHz to 6000 MHz,
for frequency exceptions for inherent
spurious response, see general technical
specifications
Statistics
Statistical count 1 to 1000
Values current, average, maximum, standard
deviation
Trigger
Trigger sources WLAN: free run,
WLAN: IF power
24 Measured with channel estimation based on payload.
25 The maximum permissible continuous power is +34 dBm due to thermal limits.
26 3 dB less with R&S ® CMW-H590D RF frontend (ADV.).