K-Best Technology Inc. 5111R 사용자 설명서

                                                                                                                                                  E1 Spread Spectrum Radios

           

9-21

The received signal level (RSL) can be estimated using the following formula: 

RSL (dBm) = P

out

 – FL

1

 + G

1

 + G

2

 – FL

2

 – L

P

where: P

out

 is the transmitter output power (in dBm) 

FL

1

 is the feeder loss of the transmit side (in dBm) 

G

1

 is the gain of the transmit antenna (in dB) 

G

2

 is the gain of the receive antenna (in dB) 

FL

2

 is the feeder loss of the receive side (in dB) 

L

P

 is the Path loss, defined by: 

L

P

 (dB) = 96.6 + 20 log

10

F + 20 log

10

D

where: F = Frequency in GHz (1.5, 2.4 or 5.8) 

D = Distance of path in km 

This link budget is very important for determining any potential problems during installation. If you have 

calculated the expected RSL, you can see if it has been achieved during installation, and troubleshoot if 

necessary. 

Figure 9-8 RSL and Link Budget