User's Manual

Corning Optical Communications User Manual
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CMA-601-AEN
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Page 10
1.2.2 GX Interface Box (IFB) to ONE
Headend
The IFB is a combiner/splitter interface box which supports
connections to two HEUs, combines the RF services and routes
them through optical central hub (OCH) modules towards the
GX remotes.
The IFB includes an integrated intermediate frequency (IF) clock
module for generating a 2970 MHz pilot signal required for
synchronizing the TDD band.
The IFB enables deploying a GX high-power WCS/2.5 GHz TDD
(dual-band) remote alongside a GX quad-band remote where it
supports connections to two OCH optical modules per service
group (i.e., three OCH-8 or six OCH-4 units).
Block Diagram of IFB System Description | Figure 1.3
1.2.3 GX Deployed with MA1K/MA2K
Platform
Figure 1.4 illustrates a GX dual-band remote MIMO scenario
deployed with an MA1000/2000 headend alongside two GX
quad-band remotes providing MIMO coverage for the
CELL/ESMR, PCS, EAWS, and 700 LTE bands..
Note: GX quad-band models GX-E17E85P19L70-40-AC and
GX-E17E85P19L70-40-DC do not support coexistence with other GX
models. The quad-band services must be routed through separate
RF paths (i.e., different RIU-12 sector and optical module).
The MIMO1 and MIMO2 services are conditioned via two
independent sectors in the RIU-12 units, ensuring a constant RF
level for each MIMO stream. The conditioned MIMO1 and
MIMO2 signals are routed through separate optical modules in
the OCH. Each optical module converts the RF signal to an
optical signal for transport over low-loss fiber cabling to/from
connected GX remote, where they are converted to high-level
RF signals.
The GX dual-band remote includes an internal combiner so that
both WCS and 2.5 GHz TDD bands services are transmitted via a
single output port (SISO) or two for MIMO. In addition, an
external low-loss combiner is used to combine the dual-band
GX with the quad-band GX to support six bands services on a
single output port.