MBF-40 SMR900 PS REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
Cobham Wireless
–
Coverage
Date: 31-May-18
www.cobham.com/wireless
Doc. No. 00141UM
Rev. 1.0
Page |
6
2 INSTALLATION REQUIREMENTS AND PROCEDURE
This chapter provides information on the service antenna requirements, general installation requirements
and the installation procedure.
2.1 Service Antenna Requirements
ATTENTION!
•
The installer is held accountable for implementing the rules required for deployment.
•
Good engineering practice must be used to avoid interference.
•
Output power should be reduced to solve any IMD interference issues
This section provides information on the specifications of the service antennas suitable for operation with
this repeater, on the installation requirements of the antennas and on the Repeater installation site and
cable requirements.
2.1.1 Required Antenna Information
The following antenna requirements, specifications and site considerations should be met.
•
Type of installation – indoor
•
Service area type and size
•
Antenna type and characteristics
•
Height
•
Length and type of coaxial cable required for connecting the Service antenna to the remote and the
attenuation.
2.1.2 Recommended Antennas
The Service antenna is installed indoors, where the type of antenna depends on the application.
Specifications:
•
One or a combination of the following antennas can be used: Ceiling-mount patch antenna, wallmount
patch antenna, corner reflector.
•
Choose an antenna with high side lobe attenuation which enables maximum isolation from other service/
mobile antennas.
Equation (1) — Max service antenna gain
Maximum service antenna gain (dBi) = 39.1 – (37 dBm - # 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
Содержание MBF-40 Americas
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