Fusion INTELPage IP 5 Manual Do Utilizador

Fusion Intelpage IP 

 

Manual 

Page 

50

 

 

© Commtech

Wireless

 

Thick steel and concrete, large magnetic and electric fields, and terrain and weather 
conditions will affect transmitter efficiency, so you will need to test the coverage of your 
local area transmitter at some stage of installation. 

When you perform the test you should pay particular attention to the quality of the 
messages that you receive on the test pager. If you receive corrupted messages then it is 
possible that you will have problems sending messages to that region. 

If you find that you are receiving corrupted messages then you should consider the 
following methods for improving transmission quality: 

•  Move the antenna to a position that gives it a clear line of site to all areas you wish to 

cover. 

•  Reduce the length of the cable connecting the aerial to transmitter. 
•  Use the appropriate coaxial cable to connect the aerial to transmitter which will suit 

the length of the cable run. For example use RG213 for runs up to 20 meters and use 
LDF440 for runs over 20 meters. 

•  Choose another type of antenna for the transmitter. 
•  Position the antenna in a higher location or use an antenna with a higher gain. 

Increase the transmitter power. There are a number of objections to this method, such as 
local restrictions on aerial power.  In addition, doubling the transmitter power to the 
aerial only gives an increase in range of a factor of 1:19  (fourth root).  

For buildings in an area with good field strength outside but weak reception within, 
possibly caused by shielding due to reinforcement in suspended slabs, metal plating and 
other building materials: 
•  The supply lead to the aerial can serve as a radiator, effectively providing a 5 meter 

(yard) range form the cable. 

•  The supply from open (leaky) coaxial cable as a line radiator lead to a 50 Ω terminator 

(the cable is in effect the aerial).