Installation Guidelines
Coaxial Cable Connections
MA2000 Installation and Configuration Guide
24
3.3.2
RF Rules
•
Use coax RG223, 50ohm, male-to-male N-type for RF connections from the BUs to the
BTS/RBS and to the RIU.
•
When using the MobileAccess system in an environment in which other indoor coverage
systems are installed, it is recommended (where possible) that the antennas are placed
at least two meters apart
•
When bending coax cables, verify that the bending radius does not exceed the coax
specifications.
•
Use wideband antennas supporting a range of 800Mhz to 2500Mhz
•
Use a VSWR meter (i.e. Site Master or equivalent) for checking coax cables, including
the antennas. (<2). The VSWR must be measured prior to terminating the RUs in the
remote communication rooms
•
Terminate all unused RU and RIU ports with a 50 ohm load
3.3.3
Coax Cable Lengths and Losses
Use coax ½”, 50ohm, male-to-male N-type, for connecting to RHU and antenna ports.
NOTE: The required distance between the antennas (installed in the ceiling) depends on the infrastructure
and calculated path-loss. For example, if there is free space-loss between the antennas, a minimum
distance of 100 ft is required; if there are partitions (loss) between the antennas, a distance of less than
100 ft between them is allowed.
Coax Length coax Loss (900Mhz) connector loss Total Loss
30
0.7
1.5
2.2
40
0.9
1.5
2.4
50
1.1
1.5
2.6
60
1.3
1.5
2.8
70
1.5
1.5
3
80
1.7
1.5
3.2
90
1.9
1.5
3.4
100
2.1
1.5
3.6
110
2.3
1.5
3.8
120
2.5
1.5
4
130
2.7
1.5
4.2
140
2.9
1.5
4.4
150
3.1
1.5
4.6
160
3.3
1.5
4.8
170
3.5
1.5
5
180
3.7
1.5
5.2
190
3.9
1.5
5.4
200
4.1
1.5
5.6
