Справочник Пользователя для Andrew Wireless Innovations Group RPT-NODEC1943

 

User’s Manual for Node C Network Elements

 

Page 62 

PRELIMINARY M0121A1A_uc.doc

 

 
b)  Typical Tuning Procedure (See example table below): 
 
1.  Point the donor antenna in the general direction of the donor base station. 
2. Start the AAA. 
3.  Verify that the reported DL Rx Power is above –90dBm.  If not, orient the antenna 

until the signal is above –90dBm. 

4.  Wait for Pilot RSCP results to be reported (indicating that a valid pilot has been 

found). 

5.  Verify that the ARFCN and frequency reported at the top of the table matches the 

ARFCN and frequency of the donor base station. 

6.  Orient the antenna to maximize the Pilot RSCP from the donor base station.  

Usually, the best method is to course-tune the antenna based on DL Rx Power 
measurements and then fine-tune based on Pilot RSCP measurements. 

 

However, if multiple pilots are present, then using the DL Rx Power 
measurements alone may not work well, and the user will have to rely on Pilot 
RSCP only. 

7.  If multiple rays are present, then it is usually best to orient the antenna to 

maximize the level of the first ray (the line-of-sight – or LOS – signal). However, if 
the first ray is not the strongest signal, then there is an obstruction in the LOS 
signal, and the strongest signal is a multipath component. This may mean that the 
donor signal is prone to fluctuation, resulting in sub-optimal performance of the 
unit.  

 

Multipath 

Componen

t 

1st Ray 

2nd Ray 

1st Ray 

1st Ray 

-80 

- - - - 

-80 

- - - - 

-80 

-91 -92 -93 -94 

-80 

- - - - 

-80 

- - - - 

-80 

- - - - 

-80 

-91 -92 -93 -94 

-80 

- - - - 

-80 

- - - - 

-80 

- - - - 

-80 

-90 -91 -92 -93 

-80 

- - - - 

-80 

- - - - 

-80 

- - - - 

-80 

-90 -91 -92 -93