User Manual

15741-1000 Rev. 0.09 03/31/00
AirStar User Guide for Release 2.1.4
AirStar User Guide for Release 2.1.4 AirStar User Guide for Release 2.1.4
AirStar User Guide for Release 2.1.4
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Figure Error! No text of specified style in document.-2 Installing the BRU onto Mounting Plate
(Rear View)
Figure Error! No text of specified style in document.-3 Installed BRU on Mounting Plate (Rear
View)
Figure Error! No text of specified style in document.-4 Installed 26 GHz or 39 GHz BRU (Front
View)
4.1.3
4.1.34.1.3
4.1.3 Connecting the BRU Coaxial Cable
Connecting the BRU Coaxial CableConnecting the BRU Coaxial Cable
Connecting the BRU Coaxial Cable
Use the following procedure for connecting the coaxial cable to the BRU.
1.
Install the right-angle TNC-TNC adapter onto the coaxial connector. Ensure
that the connector is dry and free of corrosion. Even a small amount of
corrosion or dampness can cause signal degradation.
2.
Connect the coaxial cable to the TNC connector on the BRU. When an LMR400
coaxial cable is used, a one meter section of LMR240 coaxial cable with a male
TNC and female N-type connector is required.
3.
Wrap the connector and the junction between the TNC and the N-type junction
with self-amalgamating weather proof tape (MOX-TAPE part number 620-.75,
Fujipoly™ part number Flat-STV-20-.75, or equivalent).
4.
Tie wrap the cable to the pole, leaving a minimum 18 inch service loop with
a 6 inch drop. This loop will be longer for LMR400 cable; be sure to observe
the minimum bend radius given earlier in this chapter. Be sure the loop points
down so that water drains away from the connector. Figure Error! No text of
specified style in document.-5 shows the coaxial cable service loop for the
BRU.
5.
Multiple BRUs may be installed on a single pole. Allow 0.5 meter separation
between BRUs on the pole. The RF radiation path expands outward from its
point of origin - be sure that one BRU does not block another’s radiation path.