Remote GPS Head Installation
– continued
JAN 2002
3-17
SC
300 1X BTS Hardware Installation, ATP, and FRU Procedures
DRAFT
The RGPS head is rated for ambient air temperatures from –40
°
C
(–40
°
F) to 80
°
C (176
°
F), and has ratings for humidity, shock,
waterproof, UV light resistance, vibrations, salt fog, ESD, EMI, and
altitude.
If you are designing a system to support a maximum of 12
daisy–chained BTS sites, the maximum cable length between the
RGPS head and the first BTS is 600m (1968 ft.). The maximum cable
length between each subsequent BTS in the chain is also 600m (1968
ft.). If a long cable run needs to be broken into pieces, minimize the
number of breaks in the cable.
If you are designing a system to support a maximum of 7
daisy–chained BTS sites, the maximum cable length between the
RGPS head and the first BTS is 1km (3280 ft.). The maximum cable
length between each subsequent BTS in the chain is also 1km (3280
ft). If a long cable run needs to be broken into pieces, minimize the
number of breaks in the cable.
Procedure to Install the RGPS
Head
Table 3-9, Figure 3-7, and Figure 3-8 show the procedure for installing
the RGPS head.
The RGPS head must not make contact with any metal
surface other than the provided hardware. Use only the
equipment provided to mount the RGPS head. Failure to
do so could damage the RGPS head.
CAUTION
Table 3-9: Procedure to Install the RGPS Head
Step
Action
1
Determine the mounting location.
2
n
WARNING
The structure of the wall should be verified by a qualified structural engineer.
Mounting the RGPS head and hardware to an inadequate wall structure and/or using inadequate
installment methods can result in serious personal injury.
Use the appropriate mounting bolts for the mounting surface and install the two wall mounting
brackets. Refer to Figure 3-7.
3
Insert the RGPS cable (cable M) into the pipe.
4
Connect the 12 pin Deutsch connector of the RGPS unit cable to cable M. Refer to Figure 3-8.
Tighten the spinning flange on the connector a quarter turn to secure the connection.
5
Insert the pipe into the threaded mount in the RGPS unit and carefully hand–tighten.
6
Place the assembly into the mounting brackets. Refer to Figure 3-7. Tighten the U–bolt clamps
to secure the assembly.
3
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