Andrew Wireless Innovations Group BCP-TFAM26 Model TFAM26 Downlink Booster User Manual

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Date Submitted	2004-06-25 00:00:00
Date Available	2004-06-25 00:00:00
Creation Date	2004-06-24 14:55:43
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Document Lastmod	2004-06-24 14:56:20
Document Title	User Manual
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Document Author:	tekmar sistemi

PLU S
User Manual
MN024-04
MN024-04
 Copyright Tekmar Sistemi Srl
Tekmar Sistemi Srl
An Andrew Company
Via De Crescenzi 40
48018 Faenza RA
Tel: (+39) 0546 697111
Fax: (+39) 0546 682768
www.andrew.com
This publication is issued to provide outline information and is not aimed to
be part of any offer and contract.
The Company has a policy of continuous product development and
improvement and we therefore reserve the right to vary information quoted
without prior notice.
System and Customer care is available world-wide through our network of
Experts.
The company is certified ISO 9001 and ISO14000.
User Manual
INDEX
1.
Introducing Britecell Plus
1.1
The Features
1.2
Britecell Plus brief Description
1.3
Britecell Plus Features
1.4
Britecell Plus typical Applications
2.
Equipment Overview
10
2.1.
The Remote Unit TFAxxx and relevant TKA installation kit
11
2.2.
The Britecell Plus Master Unit
12
2.3.
Block diagrams
15
3.
Remote Unit TFAxxx
18
4.
Master Unit
32
4.1.
19” Subrack TPRNxy
33
4.2.
Local Unit TFLN
47
4.3.
2-way splitter TLCN2
57
4.4.
4-way splitter TLCN4
60
4.5.
RF diplexer TLDN
63
4.6.
RF triplexer TLTN
66
4.7.
RF duplexer THYN
69
4.8.
RF attenuator TBSI
72
4.9.
Digital RF attenuator TDI
75
Power limiter TMPx-10
79
4.10.
5.
Optional equipment and accessories
82
5.1.
WLAN interface TWLI
83
5.2.
Amplifier TWANx
86
5.3.
WLAN booster TFBWx
89
5.4.
Remote power supply TRS/TRSN
93
MN024-04
4
User Manual
1. Introducing
Britecell Plus
MN024-04
1.1 The Features
Britecell Plus is an innovative platform designed in order to provide an effective and flexible
coverage to a large variety of indoor scenarios.
Thanks to its high modularity, its low power consumption, and its full-transparency to protocols and
modulation formats, Britecell Plus is the perfect plug&play solution to distribute any wireless
standard (including GSM, GPRS, EDGE, CDMA, WCDMA, and WLAN IEEE 802.11b) to the inbuilding environments requiring reliable and interference-free communications, as well as high
traffic capacity and maximum flexibility about future expansions.
These unique features make the Britecell Plus platform suitable also for applications to critical areas
experiencing difficulties in establishing and keeping phone calls, while its compact design always
guarantees a minimum aesthetic impact.
1.2 Britecell Plus brief Description
Britecell Plus is a Distributed Antenna System (DAS) based on the Radio-over-Fibre (RoF)
technology, and capable of carrying wireless mobile signals through the 400 MHz- 2500 MHz
frequency range regardless of their protocol and their modulation format.
The system has two basic components, a Master Unit and a Remote Unit. The Master Unit is made
of one or more subracks typically connected to the BTS (Base Tranceiver Station) through either a
repeater (RF interface) or a coaxial cable.
Each Remote Unit is connected with a dedicated pair of single-mode optical fibres (one for UL and
one for DL) to the Master Unit. These optical fibres work on 1310 nm wavelenght and provide low
losses and almost unlimited bandwidth, available for future system developments.
Britecell Plus is a modular system whose basic components are:
•
one Master Unit made of one or more subracks, each providing 12 module slots. Each slot
can host either an active or a RF passive device (chosen among the wide range of Britecell
Plus options), in order to meet the planned design requirements;
•
a variable number of Remote Units (TFAxxx), whose function is feeding the antenna passive
network;
•
a proper number of indoor antennas, suitable to provide radio coverage to the area. Britecell
Plus is fully compatible with any type of indoor antennas;
•
the optical cables required to connect the 19” subracks to the TFAxxx.
12
BTS
RF interface
TFLN
Two F.O. per RU
REMOTE
UNIT
Fig. 1: Britecell Plus system block diagram.
User Manual
1.3 Britecell Plus Features
The following lines report a brief summary of Britecell Plus main features:
•
multiband 2G, 2.5G and 3G – 802.11b WLAN compatible: Britecell Plus is completely
transparent to any transmission protocol and modulation format, and it can distribute any 2G,
2.5G, 3G wireless standard. In addition, a special option allows to carry also the WLAN
(802.11b/g) service over the same infrastructure;
•
modular configuration for flexible design: by properly setting some parameters like the
amount of RUs and the antenna locations, the Britecell Plus architecture can follow the
environment specific features in order to obtain the most effective radio-coverage of the
indoor area. The modularity of the system allows easy modifications for future growth and
increasing traffic;
•
easy to install: the intelligent plug & play Britecell Plus system includes an Automatic Gain
Control (AGC), that eliminates system gain variations regardless of optical loss. This avoids
the need for field adjustments, thus reducing design, installation and optimization time.
•
low-power consumption: establishing a “quasi line-of-sight propagation” towards all
mobile phones inside the area, Britecell Plus works with extremely low power levels. Low
power levels have two great advantages: 1) allow mobile phones to work at lower power
levels, thus limiting the radiated emissions and increasing their battery life; 2) allow a better
control of interference effects between adiacent cells.
•
central supervision functions: all individual alarms of Britecell Plus system are stored in an
internal flash memory, and available to both local and remote connections. Detailed alarm
information is provided by special software (i.e. by Supervision or Maintenance software
tools) running on a locally connected host, as well as any information about alarm status and
alarm history is available to remote connections via TCP/IP protocols, SNMP agent, or
HTTP servers. This alarm information is visible also by means of LEDs present on the front
panels of both the MU and the RUs;
•
multiple-carriers system: there are no restrictions on the number of carriers that the
Britecell Plus can convey. Obviously, the more carriers per service, the less power per
carrier;
•
remote power supply: in case mains cannot be used for the Remote Units, Britecell Plus
offers a centralised power supply option, which distributes both a DC low-voltage (- 48)
power and the optical signals through a composite fibre optic/copper cable;
•
wide variety of RF passive devices: the connections between the DAS and the local BTSs
can be arranged so as to get the best fit for customers needs. Britecell Plus equipment
provides RF splitters/combiners, multi-band duplexer/triplexer, attenuators, couplers for
UL/DL paths, thus allowing the maximum design flexibility
•
high reliability: the MTBF (Mean Time Between Failure) is estimated to be 300000 hours.
MN024-04
1.4 Britecell Plus typical Applications
Thanks to its unique features Britecell Plus is the ideal solution to set up radio coverage in may
situations:
•
Multi operator shared infrastructure: each mobile operator has its own carriers, which
must be transported without affecting the others. Britecell Plus is capable of transmitting
multiple carriers simultaneously, while providing an independent level adjustment for each
of them, ensuring maximum performance and reducing infrastructure costs
•
High rise buildings: RF signals from surrounding macrocells or external BTSs are usually
quite strong inside high rise buildings, and cause so much interference that indoor mobile
communications often become impossible. By strategically placing antennas along the
exterior walls of the building, the signal to noise ratio can be optimised. This interference
control solves many problems, such as the “ping pong” effect that sometimes is experienced
when a mobile frequently changes from an indoor to an outdoor coverage.
•
Exhibition, conventions, and shopping centres: the critical point of these environments is
due to the high traffic loads, which are furthermore highly variable. Thus, the main goal to
achieve is setting up a radio coverage which could effectively manage these variable traffic
loads, with neither undervalued nor overvalued infrastructure expenses. A unique feature of
Britecell Plus is that RF frequencies can be allocated quickly when and where they are
needed, thus reducing the implementation cost. This makes Britecell Plus the proper solution
also for temporary or last minute requests (such as conferences).
•
Airports: they require modular and flexible radio coverage, in order to meet present needs
while foreseeing future expansions. Britecell Plus can manage high traffic loads providing
high quality with minimum environmental impact, while its modularity allows future
extensibility.
•
Corporate Building: inside a corporate building, difficult mobile communications may limit
business transactions. These environments are often complex and densely populated with
specific requirements to be fulfilled: high traffic capacity, maximum expectations on Quality
of service, full compatibility with wireless standards and future expandability. Britecell Plus
guarantees high quality radio coverage under all conditions, while maintaining maximum
flexibility in managing any traffic condition.
•
Subways and Highly Dense Metropolitan Areas: These areas are distinguished by large
distances, and may require that RUs are placed far away from the BTSs. Britecell Plus
guarantees the signal integrity at distances up to 3 km, and through the wideband
interconnect link option distances of 20 km can be reached. Moreover, these environments
need gradual investments, because initially operators provide radio coverage only in the
busiest areas, and then extend it in order to reach complete coverage. The modularity of
Britecell Plus helps operators to gradually expand the system. Some large cities often need to
set up seamless and reliable radio systems for emergency services. The required RF
infrastructure needs to be unobstrusive and environmental friendly; this can be achieved
using a Britecell Plus DAS. When redundancy is required, two interleaved Britecell Plus
systems can be used, management and supervision for these systems can be remotely
established by means of an external modem and an open protocol such as SNMP.
1.5 Health and Safety Warnings
IMPORTANT NOTE: To comply with FCC RF exposure compliance requirements, the following
antenna installation and device operating configurations must be satisfied: A separation distance of
at least 35 cm must be maintained between the antenna of this device and all persons. RF exposure
compliance may need to be addressed at the time of licensing, as required by the responsible FCC
User Manual
Bureau(s), including antenna co-location requirements of 1.1307(b)(3). Maximum permissible
antenna gain is:
Britecell Plus TFAM Remotes: 10dBi.
1.6 Britecell Plus Operation with Multiple RF Channels
The Manufacturer's rated output power of this equipment is for single carrier operation. For situations
when multiple carrier signals are present, the rating would have to be reduced by 3.5 dB, especially
where the output signal is re-radiated and can cause interference to adjacent band users. This power
reduction is to be by means of input power or gain reduction and not by an attenuator at the output of
the device.
MN024-04
2. Equipment
Overview
10
User Manual
2.1. The Remote Unit TFAxxx and relevant TKA installation kit
The TFAxxx is a device providing optical-to-electrical downlink conversion and electrical-to-optical
uplink conversion, thus allowing a bidirectional transmission of signals between one TFLN and the
remote antennas. It is available in 3 versions (low-power, medium-power, and high-power), each
designed in order to support different output power levels on RF antenna ports.
Fig. 2: Different Remote Unit cases
In downlink each TFAxxx receives an optical signal from the TFLN, performs an optical-to-RF
conversion, and transmits the resulting signal to the 2 antenna ports.
In uplink it receives a RF signal from remote antennas, provides a RF-to-optical conversion, and
conveys the converted signal to the TFLN over the optical fibres.
Fig. 3: TKA mounting kit for low and medium power remote units
Each TFAxxx can be provided with an optional TKA installation kit, which contains a fibre optics
splice holder and a compact case for an easy installation of the TFAxxx on walls or poles.
Moreover, the TKA compact cases are able to provide the TFAxxx with the different IP protection
levels, depending on the specific environmental requirements.
MN024-04
11
2.2. The Britecell Plus Master Unit
Below are listed the Britecell Plus modules. For further details about these components, refer to the
next chapters of this manual.
The Sub-rack (TPRN) is a 19” subrack hosting
the Britecell Plus modules; it accommodates 12
slots, whose sizes are 7 TE x 4 HE. As each
Britecell Plus module takes up one or two slots,
each Master Unit can sustain up to 12 modules,
depending on design configuration and
requirements.
The Local Unit (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 TFAxxx. In uplink it
provides optical-to-RF conversion for 4 optical
signals coming from RUs, and it combines them
into a single RF output, while providing automatic
gain control in order to balance the fibre losses.
Module dimensions:
Width = 7TE, Height = 4HE (one slot in the
Master Unit).
The duplexer (THYN): it combines the downlink
(DL) and uplink (UL) paths into a single one,
while maintaining the required isolation. The
module dimensions are: Width = 7TE, Height =
4HE.
The variable RF attenuators (TBSI and TDI):
they provide independent attenuations (adjustable
from 0 to 30dB, with 1dB steps) on uplink and
downlink RF paths, and allow the designer to
optimize the signal level close to the BTSs. TBSI
is an override attenuator, while TDI is a digital
attenuator also providing 20dB gain on the UL
path. Their dimensions are:
12
User Manual
TBSI: Width = 7TE, Height = 4HE, i.e. a 1-slot
space
TDI: Width =14TE, Height= 4HE, i.e. a 2-slot
space
The RF diplexer (TLDN): in downlink it
combines a low band RF signal (800 to 1000
MHz) and a high band RF signal (1700 to 2500
MHz) into a common RF port; in uplink it splits a
composite signal between a low band RF port and
a high band RF port. Module dimensions: Width
= 7 TE, Height = 4 HE (one slot).
The RF triplexer (TLTN): in downlink it
combines the low band signals (800 or 900MHz),
the 1800MHz band signal and UMTS signal into
a common one; in uplink it splits the triple band
signal between three different RF single band
paths. Module dimensions: Width = 7 TE, Height
= 4 HE (one slot).
The RF splitters/combiners (TLCN2 and
TLCN4): TLCN2 is a 2-way splitter/combiner.
TLCN4 is a 4-way splitter/combiner. They can
be used in a variety of different situations, such
as:
• To connect a BTS with several LUs. In
uplink the TLCN2 (or TLCN4) combines 2
(4) RF signals coming from different LUs
onto a common RF signal, entering the BTS.
In downlink the TLCN2 (or TLCN4) splits
the downlink composite RF signal coming
from the BTS onto 2 (4) RF ports, entering
different Local Units;
• To connect several BTSs to a LU. In
downlink the TLCN2 (TLCN4) combines
the RF signals coming from different BTSs
onto a common RF signal, entering the LU.
MN024-04
13
In uplink TLCN2 (TLCN4) splits the
composite RF signal coming from a LU into
2 (4) RF signals entering different BTSs.
The WLAN interface board (TWLI):.it connects
3 WLAN Access Points to each TFLN, and it is
necessary when 802.11b WLAN distribution
through the DAS is required. Dimensions: Width
= 14 TE, Height = 4HE (2 slots).
The wideband amplifier (TWANxx): it is an
amplifier used to interface low power base
stations to Britecell system. Its purpose is to
amplify both DL and UL signals in order to
compensate losses of passive combiners and
splitters. Dimensions: Width = 7 TE, Height =
4HE.
The power limiters (TMPx-10): it monitors the
DL power coming from the BTS, and attenuates
it by 10 dB in case of overcoming of a
programmable threshold level.
TMP2-10 Power Limiter is for 2G and 2.5G
signals, working at 900 MHz and 1800 MHz.
TMP3-10 Power Limiter is for 3G signals.
Both modules are 7TE wide and 4HE high.
The SNMP agent (TSUNx): it is able to control
up to 14 master units. It is available both as a
plug-in module (Width = 14 TE, Height = 4HE,
2 slots) and as stand alone device (Width= 19”,
Height=1HE). It consists in a CPU, a flash
memory and an Interface Board.
14
User Manual
2.3. Block diagrams
To better understand the functions of the different units and modules, two block diagrams of the
Britecell Plus system are reported here.
The first diagram (Fig. 4) refers to the case of duplexed BTSs, ie. BTS conveying both the downlink
and uplink signals on a single RF port. In this case, a THYN module is required to combine the
uplink and downlink paths on a single RF port. The second diagram (Fig. 5) refers to the case of notduplexed BTSs, ie BTSs conveying the uplink and the downlink connections on separate RF ports.
Table 2.1 shows an overview of Britecell Plus equipment, including all the modules and the units
stated above.
For more information about the single units and/or the single modules, please refer to the following
sections.
TFAx
TFAx
TFLN
TFAx
Triple-band system – duplexed BTSs – 8 TFLN
TFAx
TFLN
GSM
900
BTS
Fixed
Atten
THYN
91
TFAx
TFAx
TFAx
TFAx
TFAx
TBSI
TLCN4
TFAx
TFLN
TFAx
TFAx
TFAx
TFAx
TFLN
GSM
1800
BTS
Fixed
Atten
THYN
18
TFAx
TFAx
TBSI
TLTN
TLCN2
TFAx
TFAx
TFLN
TFAx
TFAx
TFAx
TFAx
TFLN
UMTS
BTS
Fixed
Atten
THYN
20
TFAx
TBSI
TFAx
TFAx
TLCN4
TFAx
TFLN
TFAx
TFAx
TFAx
TFAx
TFLN
TFAx
TFAx
DL - UL
splitting /
combining
Level
adjustment
Services
combining /
splitting
Signal splitting /
combining
Electrical / optical
conversion
3 km max
optical link
Optical/electrical
conversion
Fig. 4: Block diagram for a triple band system with 8 TFLN fully populated of TFAxxx, and
duplexed base stations.
MN024-04
15
TFAx
TFAx
TFLN
TFAx
Triple-band system – not duplexed BTSs – 8 TFLN local units
TFAx
TFAx
TFAx
TFLN
GSM
900
BTS
TFAx
Fixed
Atten.
TFAx
TFAx
TLCN
TBSI
TFAx
TFLN
TFAx
TFAx
TFAx
TFAx
TFLN
GSM
1800
BTS
TFAx
Fixed
Atten.
TFAx
TBSI
TLTN
TFAx
TLCN
TFAx
TFLN
TFAx
TFAx
TFAx
UMTS
BTS
TFAx
TFLN
Fixed
Atten.
TFAx
TBSI
TFAx
TFAx
TLCN
TFAx
TFLN
TFAx
TFAx
TFAx
TFAx
TFLN
TFAx
TFAx
Level
adjustment
Services
combining /
splitting
Signal splitting /
combining
Electrical / optical
conversion
3 km max
optical link
Optical / electrical
conversion
Fig. 5: block diagram for a triple band system with 8 TFLN fully populated, and nonduplexed base stations.
16
User Manual
Unit or
Module name
Description
Dimensions
TFAxxx case-A
TFAxxx case-B
TFAxxx case-F
Remote unit
Remote unit
Remote unit
240 x 200 x 38
240 x 240 x 38
445 x 255 x 167
TKA01
TKA02
TKA04
RU installation kit
RU installation kit
RU installation kit
280 x 240 x 55
305 x 270 x 58
340 x 240 x 55
TPRN04
TPRNx4
passive subrack
active subrack
19” x 4HE
19” x 4HE
TFLNx
Local unit
7TE x 4HE
TLCN2/4
2/4-way splitter
7TE x 4HE
TBSI2-30
adjustable attenuator
7TE x 4HE
TDI2-30
digital adjustable attenuator
14TEx4HE
THYNx
UL/DL duplexer
7TE x 4HE
TLDNx
diplexer
7TE x 4HE
TLTNx
triplexer
7TE x 4HE
TMPx-10
10 dB power limiter
7TE x 4HE
TWLI
WLAN interface
14TE x 4HE
TFBW
WLAN booster
240 x 200 x 38
TSUN1 or TSUN3 SNMP agent standalone
TSUN6
SNMP agent plug in
19” x 1HE
14TE x 4HE
Tab. 1: Overview of all Britecell Plus available modules and units
MN024-04
17
3. Remote Unit
TFAxxx
18
User Manual
Main processes carried out by the TFAxxx:
Module name:
Remote Unit
TFAxxx
Case A
• In Downlink (DL) operations:
Optical-to-RF conversion of the input optical signal
Automatic Gain Control (AGC) of each converted signal, in order to
compensate optical losses (provided they are < 4dB);
RF amplification: the converted RF signal is boosted in order to
maintain a good signal-to-noise ratio
RF filtering: a proper filter rejects the spurious emissions which lie
out of the Downlink band
RF duplexing and splitting: the boosted RF signal is conveyed to 2
antenna ports
• In Uplink (UL) operations:
RF amplification: a low noise amplifier boosts the signal received
from antennas so as to maintain a good signal-to-noise ratio
RF filtering: the boosted signal is cleaned from the spurious
emissions which lie out of the Uplink band
Automatic Level Control (ALC): the RF signal level is adjusted
according to the blocking requirements
RF-to-optical conversion of the signal, which is finally conveyed to
the output optical port.
RF ports:
•
2 RF antenna ports,
transmitting/receiving
signals to/from
distributed antennas.
RF antenna ports are
duplexed N-female
connectors. These RF
ports can be connected
to distributed antennas
either directly (i.e.
through RF jumper
cables) or through
external TLCN passive
splitters, thus allowing
more antennas to be
fed. Unused RF ports
are to be terminated
with a 50 Ω load.
• 1 RF auxiliary input
and 1 auxiliary output
(designed to receive
and transmit additional
signals like WLAN by
means of proper
booster TWBA).
Auxiliary input and
output ports are SMAfemale connectors.
Warm side
Green LED = power on
Red LED = major alarm
Power
Supply
(ext.adapter)
External
alarm
inputs
RF
antenna
port (N-f)
RF auxiliary
channel output
(SMA-f)
UL optical
port
(SC-APC)
DL optical
port
(SC-APC)
RF
antenna
port (N-f)
RF auxiliary
channel input
(SMA-f)
Optical ports:
•
•
MN024-04
1 optical output port, transmitting UL signals to TFLN local unit
1 optical input port, receiving DL signals from TFLN local unit
19
Main processes carried out by the TFAxxx:
Module name:
Remote Unit
TFAxxx
Case B
• In Downlink (DL) operations:
Optical-to-RF conversion of the input optical signal
Automatic Gain Control (AGC) of each converted signal, in order to
compensate optical losses (provided they are < 4dB);
RF amplification: the converted RF signal is boosted in order to
maintain a good signal-to-noise ratio
RF filtering: a proper filter rejects the spurious emissions which lie
out of the Downlink band
RF duplexing and splitting: the boosted RF signal is conveyed to 2
antenna ports
• In Uplink (UL) operations:
RF amplification: a low noise amplifier boosts the signal received
from antennas so as to maintain a good signal-to-noise ratio
RF filtering: the boosted signal is cleaned from the spurious
emissions which lie out of the Uplink band
Automatic Level Control (ALC): the RF signal level is adjusted
according to the blocking requirements
RF-to-optical conversion of the signal, which is finally conveyed to
the output optical port.
RF ports:
•
2 RF antenna ports,
transmitting/receiving
signals to/from
Warm side
distributed antennas.
RF antenna ports are
Green LED = power ON
duplexed N-female
Red LED = major alarm
connectors. These RF
ports can be connected
to distributed antennas
either directly (ie.
through RF jumper
cables) or through
external TLCN passive
splitters, thus allowing
Power
more antennas to be
Supply
fed. Unused RF ports
+5 VDC
are to be terminated
External
RF TRx
Alarm
with a 50 Ω load.
RF auxiliary channel
Port (N-f)
DL optical port
inputs
Input (SMA-f)
• 1 RF auxiliary input
(SC-APC)
and 1 auxiliary output
RF TRx
RF auxiliary channel
UL optical port
(designed to receive
Port (N-f)
Input (SMA-f)
(SC-APC)
and transmit additional
signals like WLAN by
means of proper
booster TWBA).
Auxiliary input and
Optical ports:
output ports are SMA• 1 optical output port, transmitting UL signals to TFLN local unit
female connectors.
• 1 optical input port, receiving DL signals from TFLN local unit
20
User Manual
Visual alarms:
Two control LEDs are
provided on the TFAxxx
front side.
The green LED describes
the power supply status,
while
the
red
LED
describes the major Remote
Unit failures.
TFAxxx LED
Led colour
Red
Green
Meaning
Low optical power at DL input
and/or RF amplifier failure
Power supply status
dry contacts
Dry contact alarms:
TFAxxx is provided with
two dry contacts inputs,
which can be connected
(through .062” MOLEX
plugs) to any external
device (ie. the TFBW
booster). In such a way, the
alarm information about
this external device can be
signalled through the red
LED of TFAxxx LED panel
stated above.
Dry contacts are open under
non-alarm condition
Power supply:
TFAxxx can be powered by universal mains (85/265 Vac) and by negative supply (-72/-36 Vdc).
Power supply adapter is included in the remote unit and can be external or internal according to the
different models and part numbers:
Case A: internal for all models with only exception of TFAN20 that has external adapter
Case B: always external adapter for all models
Case A Remote Unit (except TFAN20)
These Remote Units are provided with internal power supply both for the 220VAC option and for the
-48VDC option. As shown in the figure below different power supply connectors are provided for the
two versions:
220VAC version
(IEC connector)
MN024-04
-48VDC version
(4 poles connector)
21
Case B Remote Unit and TFAN20
These Remote Units are provided with external power supply both for the 220VAC option and for the
-48VDC option. As shown in the figure below different power supply are provided for the different
versions each one providing to the remote units the +5VDC power supply through a 3 poles
connector:
220Vac Power Supply
Ground 0 V
Positive +5 VDC
-48Vdc Power Supply
Two versions are available providing
different currents:
25W to be used for low power
remote units and TFAN20
30W to be used for medium power
and tri-band remote units
Warnings (to be read before remote units are installed)
Dealing with optical output ports
The TFAxxx remote unit contains semiconductor lasers. Invisible laser beams may be emitted from
the optical output ports. Do not look towards the optical ports while equipment is switched on.
Choosing a proper installation site for the remote units
1. TFAxxx Remote Units are to be installed as close as possible to the radiating antennas, in order to
minimize coaxial cable length, thus reducing the downlink power losses and the uplink noise
figure.
• When positioning the TFAxxx remote unit, consider that the placing of the relating antennas
should be decided in order to minimize the Minimum Coupling Loss (MLC),
so as to avoid blocking
• The TFAxxx remote unit is intended to be fixed on walls, false ceilings or other flat vertical
surfaces (TKA installation kits are available, in order to provide a protective cover for TFAxxx
Remote Unit, while making the TFAxxx installation easier and faster).
Handling optical connections
•
•
•
•
22
When inserting an optical connector, take care to handle it so smoothly that the optical fibre is not
damaged. Optical fibres are to be single-mode (SM) 9.5/125µm.
Typically, Britecell Plus equipment is provided with SC-APC optical connectors (other
connectors may be provided on request). Inserting any other connectors will result in severe
damages.
Do not force or stretch the fibre pigtail with radius of curvature less than 5 cm. See rightward
figure for optimal fibre cabling.
Remove the adapter caps only just before making connections. Do not leave any SC-APC adapter
open, as they attract dirt. Unused optical connectors must always be covered with their caps.
User Manual
•
Do not touch the connector tip. Clean it with a proper tissue before inserting each connector into
the sleeve. In case connector tips need to be cleaned, use pure ethyl alcohol.
WRONG
OPTIMAL
TFAxxx installation instructions
The TFAxxx kit includes:
A. 1 remote unit TFAxxx
B. a 50 Ω load
and according to the chosen model
C. an external power supply adapter (85-264 Vac or -48 VDC)
D. mains plug or -48 plug
First, drill into the wall so as to install four M4 screw anchors (not included) according to the
dimensions indicated by the installation drawing in fig. 6, 7.
Fix the TFAxxx remote unit to the wall by firmly screwing the anchors.
In case you have purchased a TKA installation kit
so as to preserve your TFAxxx remote unit, a splice
holder is provided with the kit:
1. Fix the splice holder inside the splice tray.
2. Splice the optical fibres and close the splice tray.
3. Take care not to bend the fibres too much.
4. Fix the splice tray inside the splice box.
Note:
If you use your own splice box fix the splice box beside the
TFAxxx
Connect the TFAxxx unit to mains, through a power supply
cable and itsexternal adapter.
MN024-04
23
Fig. 6: CASE A layout with quote for wall anchors
24
User Manual
Fig. 7: CASE B layout with quote for wall anchors
MN024-04
25

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