LTE交流资料(2)

看驻波

一，需要开的参数，feature： 1，激活以下feature VSWR

72 Licensing=1,OptionalFeatures=1,VswrSupervision=1 featureStateVswrSupervision 1 (ACTIVATED)

72 Licensing=1,OptionalFeatures=1,VswrSupervision=1 licenseStateVswrSupervision 1 (ENABLED)

72 Licensing=1,OptionalFeatures=1,VswrSupervision=1 serviceStateVswrSupervision 1 (OPERABLE) 2，设置参数：

vswrSupervisionActive 设置为true， 默认为false

vswrSupervisionSensitivity 设置为100，意为门限1.5；默认为1，门限3

对于RRUL81，请将port A, B, C, D, E, F, G, H设置为 true，请不要将port I 设置为true 对于RRUL62，请将port A, B 设置为 true，请不要将port R 设置为true 因为对于RRUL81，只有A到H才有VSWR监控的功能，I口是没有的 同样对于RRUL62，只有AB口有VSWR监控的功能，R口是没有的

3， 参数含义

vswrSupervisionSensitivity = 1 { 1..100 }

The sensitivity of Voltage Standing Wave Ratio (VSWR) supervision.

A high value enables detection of a low reflected power (high return loss). A low value requires a high reflected power (low return loss) to cause an alarm.

VSWR = (1+10^(-RL/20))/(1-10^(-RL/20))

Where RL is Return Loss

The relation between the sensitivity and return loss on the RU is defined as:

RL = 6 + vswrSupervisionSensitivity [%]*0.08 dB

This gives VSWR=1.5 for 100% sensitivity and VSWR=3 for 1% sensitivity.