Agilent Technologies N9010A - Manual (Page 301)

Chapter 34 301
Single Acquisition Combined Fixed WiMAX Measurement Application
Measurements
Description Specifications Supplemental Information
64QAM EVM
(ML
a
= –10 dBm
20 to 30°C)
10 MHz bandwidth profile.
Code Rate: 3/4
EQ Seq
Track Phase On
Track Amp Off
Track Timing Off
EVM
Operating range 0.1 to 8% (nominal)
Floor –45.0 dB (0.57%) (nominal)
Accuracy
b
from 0.5% to 2.0% ±0.30% (nominal)
from 2.0% to 8.0% ±0.10% (nominal)
I/Q Origin Offset
UUT Maximum Offset –10 dBc (nominal)
Analyzer Noise Floor –50 dBc (nominal)
Frequency
Range ±100 kHz (nominal)
Accuracy ±10 Hz+tfa
c
a. ML (mixer level) is RF input power minus attenuation
b. The accuracy specification applies when the EVM to be measured is well above the measurement
floor. When the EVM does not greatly exceed the floor, the errors due to the floor add to the accuracy
errors. The errors due to the floor are noise-like and add incoherently with the UUT EVM. The errors
depend on the EVM of the UUT and the floor as follows: error = sqrt(EVMUUT
2
+ EVMsa
2
) -
EVMUUT, where EVMUUT is the EVM of the UUT in percent, and EVMsa is the EVM floor of the
analyzer in percent.
c. tfa = transmitter frequency
× frequency reference accuracy.