User's Manual

19MN024-010

2.3. The ION-B Master Unit

The ION-B Master Unit is a widely-ﬂ exible system. Its modular feature allows it to be developed

both for simple installation-friendly, unobstrusive applications to complex installations, involving

a virtually unlimited number of subracks, and distributed through several ﬂ oors of a building or

through a 20km distance.

The following text presents a brief overview of the components of these units.

The TPRF31 Fast MiniRack is a 19” x 1HE fast-

MiniRack housing 2 slots: it can therefore

accommodate 2 of the single-slots (7TE x 4HE)

ION-B cards presented in the following. Thanks to

its turnable brackets, the TPRF31 is suitable both

for wall and rack-mounting, and can therefore be used both as a stand-alone unit (for simple

ION-B installations) and as an integration of a bigger and more complex ION-B system .

The TPRN sub-rack is a 19”x 4HE subrack with 12

slots, each one sized 7TE x 4HE. As each ION-B

module takes up one or two slots, each Master

Unit can host up to 12 modules, depending on

the design conﬁ guration and requirements.

The Master Optical TRX (TFLN): in downlink, it provides an RF-to-optical

conversion of the signal coming from the BTS, and transmits it to 4 optical

outputs, so as to feed 4 TFAx. In uplink, it provides optical-to-RF conversion for

4 optical signals coming from the RUs, and it combines them into a single RF

output, while providing automatic gain control in order to balance the ﬁ bre

losses. Module dimensions:

Width = 7TE, Height = 4HE (one slot in the master unit sub-rack).

The Duplexer (TDPN): it combines the downlink (DL) and the uplink (UL)

paths into a single one, while maintaining the required isolation. The module

dimensions are: Width = 7TE, Height = 4HE

Fig. 2.4 TPRN subrack

Fig. 2.5 TFLN card

Fig. 2.6 TDPN card

Fig. 2.3 TPRF31 subrack