Agilent Technologies N9010A - Manual (Page 187)

Chapter 20 187
802.16 OFDMA Measurement Application
Measurements
Description Specifications Supplemental Information
Adjacent Channel Power
Minimum power at RF Input
−36 dBm (nominal)
ACPR Accuracy
Radio BW Offset
MS 5 MHz 5 MHz
±0.10 dB
At ACPR
−24 dBc with optimum
mixer level
a
MS 5 MHz 10 MHz
±0.45 dB
At ACPR
−47 dBc with optimum
mixer level
b
MS 10 MHz 10 MHz
±0.17 dB
At ACPR
−24 dBc with optimum
mixer level
c
MS 10 MHz 20 MHz
±0.83 dB
At ACPR
−47 dBc with optimum
mixer level
b
BS 5 MHz 5 MHz
±0.90 dB
At ACPR
−45 dBc with optimum
mixer level
d
BS 5 MHz 10 MHz
±0.72 dB
At ACPR
−50 dBc with optimum
mixer level
b
BS 10 MHz 10 MHz
±1.22 dB
At ACPR
−45 dBc with optimum
mixer level
e
BS 10 MHz 20 MHz
±1.33 dB
At ACPR
−50 dBc with optimum
mixer level
b
a. To meet this specified accuracy when measuring mobile station (MS) at
−24 dBc ACPR, the mixer
level (ML) must be optimized for accuracy. This optimum mixer level is
−25 dBm, so the input attenu-
ation must be set as close as possible to the average input power. For example, if the average input
power is
−9 dBm, set the attenuation to 16 dB. Note that if the mixer level is set to optimize dynamic
range instead of accuracy, accuracy errors are nominally doubled.
b. ACPR accuracy for this case is warranted when the input attenuator is set to give an average mixer
level of
−14 dBm.
c. To meet this specified accuracy when measuring mobile station (MS) at
−24 dBc ACPR, the mixer
level (ML) must be optimized for accuracy. This optimum mixer level is
−24 dBm, so the input attenu-
ation must be set as close as possible to the average input power. For example, if the average input
power is
−4 dBm, set the attenuation to 20 dB. Note that if the mixer level is set to optimize dynamic
range instead of accuracy, accuracy errors are nominally doubled.
d. To meet this specified accuracy when measuring base station (BS) at
−45 dBc ACPR, the mixer level
(ML) must be optimized for accuracy. This optimum mixer level is
−20 dBm, so the input attenuation
must be set as close as possible to the average input power. For example, if the average input power is
−4 dBm, set the attenuation to 16 dB. Note that if the mixer level is set to optimize dynamic range
instead of accuracy, accuracy errors are nominally doubled.
e. To meet this specified accuracy when measuring base station (BS) at
−45 dBc ACPR, the mixer level
(ML) must be optimized for accuracy. This optimum mixer level is
−18 dBm, so the input attenuation
must be set as close as possible to the average input power. For example, if the average input power is
−2 dBm, set the attenuation to 16 dB. Note that if the mixer level is set to optimize dynamic range
instead of accuracy, accuracy errors are nominally doubled.