User's Manual

Coaxial Cable Connections I P/N 709C011101 I Page 9
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2.3.2 RF Rules
• 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 SCU ports with a 50 ohm load
2.3.3 Coax Cable Lengths and Losses
Use coax ½”, 50ohm, male-to-male QMA type, for connecting to SCU broadband 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