Stereo System User Manual

Chapter 8 115
802.16 OFDMA Measurement Application
Measurement Specifications
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 −dBm, set the attenuation to 16 dB. This specification applies for the normal 3.5 dB
peak-to-average ratio. 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. This specification applies for the normal 3.5 dB
peak-to-average ratio. 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. This specification applies for the normal 10 dB peak-to-average
ratio (at 0.01
% probability). Note that if the mixer level is set to optimize dynamic range instead of
accuracy, accuracy errors are nominally doubled.
Description Specifications Supplemental Information