User's Manual

AXELL CSR 3604-3304 UHF REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd
Document number: 3633B-UM
Page 19 of 67
26/10/2015
Revision. 4
 Install the donor antenna at a higher level (i.e. floor) than the mobile antenna.
4.2 Service Antenna Requirements
WARNING!!!
a. The installer is held accountable for implementing the rules required for deployment.
b. Good engineering practice must be used to avoid interference.
c. Output power should be reduced to solve any IMD interference issues”
The Service antenna type depends on the design of the DAS.
4.2.1 Required Antenna Information
The following antenna requirements, specifications and site considerations should be met:
 Type of installation – DAS/Radiating Cable
 Service area type and size
 Antenna type and characteristics
 Height
 Length and type of coaxial cable required for connecting the antenna to the Repeater and
the attenuation.
4.2.2 Indoor Installations
4.2.2.1 Recommended Antennas
The following describes the requirements for an omni-directional mobile used for indoor
applications.
Specifications:
 One or a combination of the following antennas can be used: Ceiling Mount Patch
antenna, Wall Mount Patch antenna, Corner Reflector.
 Choose an antenna with high side lobe attenuation which enables maximum isolation
from the service/ mobile antenna.
Equation (1) - Max SERVICE antenna gain
Max SERVICE antenna gain (dBi) = 39.1 – (37dBm - # of antennas in dB – cable losses in dB).
For example:
No. of Antennas
Cable Losses
Max Allowed Antenna Gain
4
3
39.1 - (37-6-3) = 11.1dBi
1
3
39.1- (37-0-3) = 5.1dBi
10
3
39.1- (37-10-3) = 15.1dBi
Typical Antenna Types: