ZXG10 iBSC Hardware Installation Guide
Figure 7-1 Structure of Direct Feeder Scheme
From
, the direct feeder scheme contains GPS antenna, 1/2" or 1/4" feeder, GPS
feeder grounding clip, and GPS lightning protector / power divider.
The calculation formula of max feeder length is as follows.
Max feeder length = (antenna gain + GPS trunk amplifier gain (optional) + N connector
gain (or 7/16 cable connector gain) + cable gain outside rack + gain of dual-frequency
coaxial cable pro cable gain in rack - best gain required by the receiver / feeder
attenuation indicator (dB/m).
shows the gain description of direct feeder scheme.
Table 7-1 Gain Description of Direct Feeder Scheme
Name
Gain (dB)
Broad outband suppression, anti-interference,
and enhanced lightning protection GPS antenna
38
N-type male connector (1/2" or 1/4" feeder); or
7/16 cable plug (hole) connected to 7/8" feeder
-0.2
1/2" jumper
-0.6
GPS trunk amplifier (optional)
22
1/4" feeder (100 m)
-26
1/2" feeder (100 m)
-10
1/2" super-flexible feeder (100 m)
-10
7/8" feeder (100 m)
-610
Dual-frequency coaxial cable protector
-4
7-2
SJ-20110531095035-004|2011-10-28 (R2.0)
ZTE Proprietary and Confidential
Содержание ZXG10 iBSC
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