Andrew Wireless Innovations Group RPT-MR803P-TR Manual Do Utilizador

U

SER

´

S MANUAL FOR BAND SELECTIVE REPEATERS 

MR

X

03P 

 

 

User'sManual.doc 

Id.-No.:154999 

Page 29 

22-Jan-01 

 

 
Please read the description carefully to avoid mistakes and proceed step by step as 
described. The repeater must not be operated with open antenna ports. This means 
that each antenna port has to be terminated with either a 50

Ω

 resistor, a dummy load 

or a connected antenna. The repeater could be damaged when operated without any 
50

Ω

 terminations. 

 
When opening the repeater, do not damage the seals on the devices inside the 
repeater. Warranty void if the seals are broken! 
 

 
Apart from the antenna isolation measurement described in chapter  5.1.3, it is also 
necessary to measure the BCCH level (BCCH=Broadcast Control Channel). The 
resulting max. allowed repeater gain of the antenna isolation must be compared with 
the resulting max. allowed repeater gain of the measured BCCH channel. The lower 
gain has to be set for the repeater. 
 
The following example clarifies how to set the correct gain: 
 
Antenna isolation: 

Antenna isolation: 

 

   100  dB 

Safety Gain Margin (SGM)*:   15  dB 

 

 

------------- 

Allowed max. gain:   

     85  dB 

 
BCCH channel: 

Power out**:   

 

   +30  dBm 

Received level of BCCH: 

 -(-40) dBm 

 

 

---------------- 

Allowed max. gain:   

     70  dB 

 

* Refer to chapter 5.1.3 Antenna Isolation for further information about SGM. 
** Max. P

out

 required by customer, but not higher than the rated P

out

 per channel stated for this 

repeater at the required number of channels. 

 
In this case, 70 dB gain has to be set for the repeater. 
 
∗ Note: