Radio Activity S.r.l. Simulcast Networks Overview

Transcript

Radio Activity S.r.l.
Simulcast Networks Overview
Radio Activity S.r.l.
Head Office and Operational Headquarter: Via Ponte Nuovo, 8 - 20128 Milano - Italy
Phone: +39 0236 514 205 - FAX/Voicebox +39 1782 242 408
Registration CCIAA Milano No 1728248 - P.I./C.F. 04135130963
[email protected] - www.radioactivity-tlc.com
ENB18-Simulcast overview 1v1.doc
updated: 15/07/2009
Index
SIMULCAST NETWORK OPERATION (BY USER POINT OF VIEW)........................................................................................ 3
WHAT IS A SIMULCAST NETWORK? ............................................................................................................................................... 3
EXPANDABILITY ......................................................................................................................................................................... 4
SIMULCAST NETWORK OPERATION (BY SYSTEM INTEGRATOR POINT OF VIEW).............................................................. 5
TECHNICAL ASPECTS ................................................................................................................................................................... 5
FORGET THE PAST EXPERIENCES OF TROUBLE SIMULCAST ................................................................................................................... 5
TYPICAL NETWORK CONFIGURATIONS............................................................................................................................. 7
TCP-IP LAN BACKBONE ............................................................................................................................................................. 7
RF LINKED BACKBONE ................................................................................................................................................................ 9
WIRED/LEASED LINE SOLUTION (ANALOG ONLY) ............................................................................................................................ 12
OVERVIEW OF RADIO ACTIVITY BASE STATIONS ............................................................................................................ 15
REMOTE CONTROL................................................................................................................................................................... 16
ENGINEERING SPECIFICATIONS ...................................................................................................................................... 19
∞
Page 2 of 19
Version 1v1
updated: 15/07/2009
SIMULCAST NETWORK OPERATION (BY USER POINT OF VIEW)
What is a simulcast network?
Normally the public cellular system (GSM) doesn’t work in emergency because all access channel of the cells saturates
and the traffic reach zero communications. Due to this reason Civil Protection and emergency Entities have got a
proprietary radio communications network.
A simulcast network is a very powerful radio network in which all the repeaters are active on the same frequency and at
the same time.
Main advantages:
∞ Automatic and continuous roaming and handover => Easy to use
∞ Functioning like single “big repeater” =>
automatic and simple conference call operation
∞ All stations directly connected to the network =>
Integrated communication sys
fc
∞ The same RF channel over all Network => no
fc
change of channel in the coverage area, one
communication per channel
The simulcast network removes the need of scan on mobiles and portables, assures real time roaming and hand over
during the call and reduces frequency license costs.
The simulcast solution is the best in case of emergency due to easy and fast “open channel” mode of operation:
∞ all people involved in emergency can listen all communications so they are continuously informed about the
critical situations
∞ the regulation of network access is made by user, absolutely more intelligent and efficient than a trunking SW
logic
The communications may be:
∞ mobile to mobile in direct mode (short range). Normally they operate in the output frequency of the network so
they can speech among them and, at the same time, they can listen the communications coming from the
network
∞ mobile to mobile in repeater mode (long range). The mobile equipments use a frequency to access the network
and a second frequency to listen the communications coming from the network (semi-duplex). The network is
equal to a single “big” repeater.
∞ mobile to dispatcher in repeater mode. The communications are in semi-duplex mode as the previous case. The
dispatcher has the priority in the communication. All the communications from the mobile and from the
dispatcher could be listen by all equipments.
∞ mobile to dispatcher in exclusive mode. It is the same of previous case but the communications from the mobile
could are listen only by dispatcher.
∞
Page 3 of 19
Version 1v1
updated: 15/07/2009
1 CH simulcast mobile radio network
Repeater
communications
Direct mode
Dispatcher
center
The communications in the network are repeated in “transparent mode”. It means that no specific signaling is required by
the network to govern the mobile terminal. The only signaling required is the access key that could be a sub-audio tone
coded squelch (analog) or color code (digital DMR). Often the user requires some specific signaling like a digital (FFSK)
message, a super-audio tone (analog) or defined groups access, users filtering and similar in DMR environment.
The network is largely independent from the mobile radio vendors: e.g. Motorola, ICOM, Tait, Simoco, … analog
TM
terminals. Radio Actvity tested successfully the DMR protocol compatibility with Motorola Mototrbo terminals.
Selective calls are often used for alert a specific group of terminals. Rarely the terminals work in mute mode without
selective call alerting.
Expandability
Every channel of the system is independent from the other channel. The communications in one channel can be transfer
to another channel only by a junction at master/Central Office level.
A system with N channel is the easy overlap of N separated simulcast networks. Note that a channel may be a single
frequency (analog) or ½ of frequency (digital DMR). The following drawing explain this concept:
Dispatcher
center
CH1
CH2
CH3
CH4
Group 1
Group 2
Group 4
Group 3
Every group of users communicate in exclusive mode in the own channel. In every channel can operate more than 1
group but, normally, they should have similar operative functions.
Every new simulcast channel can be added (with the necessary RF branching operations) without modify the other
existing channel and without service interruptions.
There are virtually no limits in the number of channel of a system, the problem could be the branching system and the
number of antennas required on sites.
∞
Page 4 of 19
Version 1v1
updated: 15/07/2009
The area of coverage of every single simulcast channel could be expand easily by adding some simulcast base stations.
These simulcast base stations will be integrated in the network with few operations at network level only (nothing is
request on mobile terminals).
SIMULCAST NETWORK OPERATION (BY SYSTEM INTEGRATOR POINT OF VIEW)
Technical aspects
To perform a simulcast radio network it is not enough to set the same frequency over all the repeaters of a multisite
network. Due to the non-linear characteristic of the FM demodulator (extracts the arctangent of the arrival angle), it is
mandatory that the emissions from two or more repeaters must be exactly the same.
To work properly, an analog simulcast radio network requires:
∞
∞
∞
∞
∞
Frequency difference between RF carriers < 10Hz
Amplitude response between +/- 0.5 dB over all audio band
Signals band coherence (not guaranteed in case of FDM channels)
Absolute delay spread less than 20µs
Phase error less than 10deg
A digital simulcast system requires also:
∞ Bit exactness transmission
∞ Absolute delay spread less than 1/10 of symbol duration (20µs @4.8Ks/s for DMR)
The analog requirements are well known and the absolute symbol delay is similar to the analog one. It is important to
note that the bit exactness involves special attention on DMR protocol aspects. In fact DMR protocol is typically
asynchronous and the actual value of some bits depends of the previous history of the communication.
At the end, to build a digital (DMR) simulcast network, it is necessary a special design of the base stations that assures the
possibility of fine delay adjust (10µs step), perfect synchronization in frequency and timing, with special algorithms for
protocol alignment. It is very hard to obtain these features from a standard repeater.
Another essential function of a simulcast network is the voting process which is the method by which the best signal
received from the network is continuously selected. In analog the Master station is able to "extract the good" of each
signal received from RBS and to create a summary one with an improvement of input signal to noise ratio. In Digital mode
(DMR) every timeslot received from all the base stations is selected to found the error free timeslot or the maximum
likelihood one in absence of CRC (e.g. voice). A high performance, real time voting system performs a “very large diversity
reception” over all the base stations involved in the call. The global effect on quality compared with the multi-frequency
approach is superb.
The best signal (analog or digital) is sent back to all base stations in “multicast” mode. This procedure reduces significantly
the bandwidth required to the backbone interconnection network.
Forget the past experiences of trouble simulcast
The simulcast networks are not very popular in the entire world due to the difficulty in achieving the precise technical
requirements illustrated previous. A lot of system integrators tried to assemble simulcast network from conventional
repeaters adding synchronizer and (analog) delay line. The result was often a network with a lot of difficulties during setup operations, with frequent and onerous maintenance operations, and, at the end, with low customer satisfaction.
∞
Page 5 of 19
Version 1v1
updated: 15/07/2009
In Italy, like other countries, the geographical constitution and other factors forced the constructors and the system
integrators to find good simulcast solution. The revolution in simulcast performances was built in the 90’ with the use of
Digital Signal Processor (DSP) devices directly inserted in the analog base station. The performances of the network were
so good that the most part of professional mobile radio networks in Italy are simulcast one!
The latest challenge is digital simulcast network. Starting from analog experiences, Radio Activity modified its DSP based
software radio, to perform DMR protocol. All development was done to achieve optimum performance of digital
simulcast and the field confirms this design. Sophisticated algorithms recover accurate sync (time and frequency),
allowing (automatically) for adjustments of the delays and the alignment of the Protocol to achieve emissions at the bit
accuracy. DSP includes the real time voting system and the network base station control layer.
The digital communications has the advantage respect to the analog one of forward error correction and adaptive
filtering functions. These functionalities reduce the amount of bit error rate with a consistent improvement of audio and
data quality in the overlap areas.
Digital or analog mode is automatically selected from the incoming signals modulation for facilitate a smooth transition
from analog to digital. A lot of base station configurations permit to realize simulcast networks with various backbone
Links: TCP/IP (also wireless one), E1/T1, twisted wires, narrowband radiofrequency link, and mixed also:
:
:
PSM
DSP
Vin_O K
Vin_KO
:
:
RX
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
Vout
Master
:
TX
BUSY N
UNLK 1
BUSY D
UNLK 2
POL
PWR RF HIGH
PWR FAIL
PWR RF LOW
ROS FAIL
DEVICE
CHANNEL
LINE
:
:
PSM
DSP
Vi n_OK
Vi n_KO
RADIO
Vout
SEL.
Slave IP
MUT E
ON
:
:
RX
TX
UNLK
RX
MT CH
TCS
SYNC
PPS
EEP
:
TX
BUSY N
UNLK 1
BUSY D
UNLK 2
POL
PWR RF HIGH
PWR F AIL
PWR RF LOW
ROS F AIL
:
BUSY N
UNLK 1
BUSY D
UNLK 2
:
:
:
:
:
:
:
DEVICE
Vin_OK
Vin_KO
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
Vout
UHF point-to –multipoint link
1 frequency from MST to SLV
N frequencies from SLVs to MST
BUSY N
UNLK 1
BUSY D
UNLK 2
PWR RF HIG H
PWR F AIL
PWR RF LOW
ROS F AIL
:
:
DSP
Vin_O K
Vin_KO
Vout
Sub-Master
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
:
TX
PWR RF HIGH
PWR FAIL
PWR RF LOW
ROS FAIL
DEVICE
SEL.
:
Vin_OK
Vin_KO
Vout
:
:
RX
TX
UNLK
RX
MT CH
TCS
SYNC
PPS
EEP
:
TX
BUSY N
UNLK 1
BUSY D
UNLK 2
POL
PWR RF HIGH
PWR F AIL
PWR RF LOW
ROS F AIL
DEVICE
CHANNEL
RADIO
SEL.
MUT E
ON
:
DSP
LINE
Vin _OK
Vin _KO
Vout
-
SEL.
+
-
:
:
PSM
DSP
Vi n_O K
Vi n_KO
Vout
TX
UNLK
RX
MTCH
T CS
SYNC
PPS
EEP
:
RX
:
TX
BUSY N
UNLK 1
BUSY D
UNLK 2
:
TX
UNLK
RX
MT CH
TCS
SYNC
PPS
EEP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
:
TX
PWR RF HIGH
PWR FAIL
PWR RF LO W
ROS FAIL
:
POL
DEVICE
PWR RF HIGH
PWR FAIL
PWR RF LOW
RO S FAIL
CHANNEL
:
:
PSM
DSP
Vin_OK
Vin_KO
LINE
RADIO
Vout
-
SEL.
MUTE
+
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
:
TX
PWR RF HIGH
PWR F AIL
PWR RF LOW
RO S FAIL
:
POL
DEVICE
DEVICE
RADIO
-
SEL.
ON
CHANNEL
LINE
+
+
+
MUT E
POL
CHANNEL
LINE
RADIO
-
SEL.
+
-
MUTE
ON
:
PSM
RADIO
+
IP
DMR+VoIP
Slave
-
DSP
+
Operative
Center
CHANNEL
ON
:
-
LINE
PSM
LINE
RADIO
MUTE
:
POL
CHANNEL
ON
UHF links
PSM
CHANNEL
RADIO
SEL.
:
BUSY N
UNLK 1
BUSY D
UNLK 2
DEVICE
LINE
MUT E
ON
+
+
MUTE
ON
:
:
PSM
DSP
Vin_O K
Vin_KO
Vout
Frequency 1
CH1+CH2 (TDMA)
UHF links
Slave IP
ON
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
:
TX
PWR RF HIG H
PWR F AIL
PWR RF LOW
RO S FAIL
:
POL
DEVICE
CHANNEL
LINE
RADIO
SEL.
MUTE
Slave
:
:
PSM
DSP
Vi n_O K
Vi n_KO
Vout
TX
UNLK
RX
MT CH
TCS
SYNC
PPS
EEP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
:
TX
PWR RF HIGH
PWR FAIL
PWR RF LOW
ROS FAIL
:
POL
DEVICE
:
:
PSM
DSP
Vin_OK
Vin_KO
RADIO
Vout
-
SEL.
ON
CHANNEL
LINE
MUT E
+
TX
UNLK
RX
MT CH
TCS
SYNC
PPS
EEP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
:
TX
PW R RF HIGH
PW R FAIL
PW R RF LO W
ROS FAIL
:
POL
DEVICE
RADIO
-
SEL.
ON
CHANNEL
LINE
+
+
+
MUTE
All necessary functions (synchronism, voting, VoIP, remote control, network management, call control, etc.) are
integrated in the base station without the need of external expensive and tedious to cabling devices.
The Radio Activity simulcast network is really “plug and play”.
∞
Page 6 of 19
Version 1v1
updated: 15/07/2009
TYPICAL NETWORK CONFIGURATIONS
Radio Activity has a very powerful product to make simulcast network. The networks are based on the standard radio
product RA-080 / RA-160 / RA-450. These radio implement all the necessary functions for high performance simulcast
networks (timing and synchronization recovery, delay and response equalization, voting system, …).
The Radio Activity base station is the ideal “basic block” to build simulcast or multicast radio networks based on the most
common media supports. The network will operate in analog or digital (DMR) or in both (dual) mode with automatic
selection.
It is configurable to work in simulcast network with different connection links (backbone network):
∞ TCP/IP (microwave, fibre optics, LAN, WAN, …)
∞ Radio links duplex (UHF/VHF)
∞ Leased lines with 4 Wire (possibly with E&M) audio interface (example: from multiplexer thought GHz T1-2Mb/
dedicated links or thought optical fiber)
∞ Mixed TCP-IP / radio link / wired
Simulcast
“big cell”
M
Master
base station
f1
f1
S
S
S
Slave
base station
f1
Overlap area
M
S
f1
S
f1
Single site cell
coverage
Backbone links
between base stations
The audio bandwidth available
from radio terminals is 300 to
3000 Hz in TCP-IP backbone
networks also.
In the following paragraphs it will
explain the basics about a
simulcast network. For simplicity
the descriptions are made for 1
channel network. The full system is
the sum of all desired channel.
See the Radio Activity technical
related
document
“ENB7Simulcast network 1v0.pdf“ for
more detailed descriptions about
the simulcast applications.
TCP-IP LAN backbone
This is the most common application of the Radio Activity base stations. Every base station has got an Ethernet port to
connect to a LAN backbone network. An important distinction between an over-IP system and a conventional (switchbased) one is that with a IP system there is no central switch, thus eliminating a critical point of potential failure. Instead,
full use is made of IP (Internet Protocol) network technology to provide reliable data routing between network
components. This combination of IP technology and the advanced DMR communication standard produces a feature-rich
solution with a surprising degree of flexibility and resilience.
One base station of the radio network works as “Master” station. It require a fixed IP address. The other base stations are
configured as “Slave” stations with an IP static or not.
Through the LAN, the Slave base stations search the Master one and then they log themselves to it. The master governs
the radio network sending timing and related information to the slaves.
∞
Page 7 of 19
Version 1v1
updated: 15/07/2009
The incoming signal from a terminal equipment is received from one or more base stations. All base stations receiving a
valid signal send it to the master station via the Ethernet interface through the LAN backbone. The master station waits
the arrival of all signals and then performs the selection of the best signal. The master selects the incoming signals
continuously on the basis of signal/noise (analog) or maximum likelihood (digital DMR).
The master station sends back the best signal to all the slaves via the Ethernet interface through the LAN backbone
utilizing a multicast IP protocol.
p.p.s.
p.p.s.
SLAVE
MASTER
4Wire
For timing
and sync
recovery
GPS
unavailable
IP
DMR+VoIP
p.p.s.
SLAVE
SLAVE
Frequency 1
CH1+CH2 (TDMA)
All the slaves synchronize the signals received from master on the local GPS signaling base. All the base stations
synchronize also their timing, protocol history and carrier frequency to the GPS. The synchronization procedure requires
less than 1-2 minutes to reach the requested precision after a “cold start up”. Thanks to the very high stability of internal
clock sources in conjunction with sophisticated network algorithms, the synchronism remains good enough up to 8 hours
after GPS missing.
Where the GSP signal is not available or it is “too evanescent”, it is possible to recover all precise synchronisms via a
twisted pair of copper or a 4Wire interface (e.g. from a fiber optics MUX). Radio Activity develops other methods for
synchronism recovery, contact Factory for details.
In the event of a radio site becoming isolated from the network it can continue to operate in standalone mode until such
time as normal network communications are restored. Any sites still able to communicate with each other can also
continue to work together whilst temporarily isolated from the main part of the network.
The GPS is not needed in the case of multicast (non simulcast) applications. In this case the algorithms based on the TCPIP time stamps, corrected by Radio Activity “fine timing over IP” methods, perform a sufficient synchronizations of the
base stations.
The simulcast or multicast network can work in dual mode, that is, it can recognize if the incoming signal from a terminal
equipment is analogical or digital and configure itself as analogical or DMR simulcast network. In the first case the voice
will fill the entire channel (no other contemporary communication is allowed) and it will be compressed in quasi-linear
format to be exchanged between stations through Ethernet connection. In the latter case the network will support two
contemporary DMR communications (both data and voice) over the two timeslots. Full DMR features are supported.
∞
Page 8 of 19
Version 1v1
updated: 15/07/2009
If DMR terminals are programmed in scan mode, they can perform communication both with analogical terminals in
analogical mode and with DMR terminals in digital mode.
A special case should be describe when some link between the slaves is not available (it is difficult to have a LAN
connection). A Radio Activity IP modem model RA-MD-1 may be used to perform a LAN connection over a twisted pair of
wires or a 4Wire interface (e.g. from a fiber optics MUX). The resulting LAN may have a reduced bandwidth (e.g. 33.6Kb/s
or less) and introduces a significant delay (about 50-60 ms). Thanks to the low bandwidth requirements of the DMR Radio
Activity base stations, it is possible to use this solution but in digital mode only.
The following figure illustrates an example of DMR simulcast network full realized with wired lines.
Master
Phone Interf ace
Switch
2 Wire
:
Vin_ OK
Vin_ KO
Vout
:
:
TX 1
UNL K
TX 2
MTCH
L INK
BUSY N
UNL K 1
BUSY D
UNL K 2
:
PWR RF HIG H
PWR FAI L
PWR RF LO W
R OS FAIL
2 Wire
:
ALR 1
ALR 2
O UT 1
M ode m RA-D1
ACT
M ode m RA-D1
RX 1
SYNC
RX 2
PPS
ON
M ode m RA-D1
M ode m RA-D1
M ode m RA-D1
Modems
O UT 2
IN 2
IN 2
PPS
STAT
TX
L AN
Repeater
Repeater
2 Wire
Modem RA-MD1
Repeater
2 Wire
Modem RA-MD1
2 Wire
2 Wire
Repeater
2 Wire
2 Wire
Modem RA-MD1
Modem RA-MD1
Repeater
2 Wire
2 Wire
Modem RA-MD1
RF linked backbone
A lot of users need narrowband radiofrequency link to connect the base stations of the network. These links operate
typically in licensed UHF band, they can perform rugged and stable communications in “non visibility” conditions also.
Radio Activity base stations have got simple interfaces (Ethernet or 4Mb/s) to joint each other.
The “RF linked” solution has the following geometry:
Point-to –multipoint
link channels
CH1
Slave
Slave
CH1
Fixed station
CH1
Master
Slave
Slave
∞
Page 9 of 19
Version 1v1
updated: 15/07/2009
The operation of this type of network may be summarized as follows:
the radio signal emitted by a peripheral device is received by one or more receivers on the network, all tuned on the
same frequency, and sent via UHF links to a comparator, which is located on the master (or sub-master), which in turn
shall continuously select the best one in terms of signal/noise (analog) or maximum likelihood (digital DMR).
Selected signal is then sent back simultaneously on a frequency, obtained by the digital synchronism clock worked out by
DSP, to the various transmitters of the network which provide to broadcast to the area of coverage of the system. Radio
mobile coverage areas become in this way very wide, well beyond the capabilities of a single repeater, offering at the
same time to users of the network the same operational ease as a single repeater.
In more detailed view, it can be see the up-link signal path in the next example:
160MHz
450.025MHz
Slave
Receiver
450.050MHz
Receiver
450.000MHz
Receiver
450.025MHz
Slave
160.000MHz
Transmitter
460.000MHz
450.000MHz
Receiver
160MHz
Voter system
Radio Base Station MASTER
4W
Transmitter
450.000MHz
Receiver
160.000MHz
DSP
Transmitter
164.600MHz
Receiver
460.000MHz
Control Center
Radio Base Station SLAVE
The real – time DSP voting selector on the master station chooses the best signal (greater S/N for analog or maximum
likelihood for digital) incoming from the SLAVEs and sends it back to all the SLAVE stations. One different frequency is
needed in the links from every slave station. Only 1 frequency is needed from the master station to the slave ones (the
information is the same for all slaves) :
164.600MHz
460.000MHz
164.600MHz
Slave
Receiver
450.050MHz
Receiver
450.000MHz
Receiver
450.025MHz
Slave
164.600MHz
Transmitter
460.000MHz
Receiver
160MHz
Voter system
Radio Base Station MASTER
4W
Transmitter
450.000MHz
Receiver
160.000MHz
DSP
Transmitter
164.600MHz
Receiver
460.000MHz
Control Center
∞
Page 10 of 19
Version 1v1
updated: 15/07/2009
The DSP on the SLAVE stations perform automatic carrier and timing synchronization (it is recovered from a short digital
burst from the master station), delay compensation and audio equalization. The GPS receiver is not required in this
application due to the constant delay offered from the digital radio links.
The master station could be equipped up to 9 receivers (it can “see” up to 9 slave/secondary master stations).
A very integrated base station with two transceiver in the sample 19” rack is available for this applications.
Transmitter
450.000MHz
Receiver
160.000MHz
2xDSP
Transmitter
164.600MHz
Receiver
460.000MHz
Branching
Branching
It is available the sub-master station for very large coverage area:
CH1
Slave
Slave
CH1
CH1
Master
Slave
Sub
Master
CH1
Slave
CH1
∞
The sub-master station operates
like a master station with an
additional
transceiver
that
perform the link with the primary
master station. The sub-master
send the best signal selected
from its salves to the primary
master and it sends back to its
salves the signals receiving from
the primary master.
The sub-master recovers and
regenerates all synchronism and
signaling for correct simulcast
operation.
Slave
Page 11 of 19
Version 1v1
updated: 15/07/2009
Wired/leased line solution (analog only)
The “wired” solution for simulcast requires link connections between the base stations with 4 Wire balanced (possibly
with E&M) audio interface (example: from multiplexer thought GHz T1-2Mb/ dedicated links or thought optical fiber).
There are two main geometries for “wired” simulcast:
∞ Star network
∞ Pipeline network
The functioning is similar so we start the description with the “star” type.
The “star wired” solution has the following geometry:
:
PSM
Vi n_OK
Vi n_KO
Vou t
Slave 1
:
DSP
TX
UNL K
RX
M TCH
TCS
S YNC
P PS
E EP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
TX
:
PWR RF HIGH
PWR FA IL
PWR RF LOW
ROS FAIL
:
POL
DEVICE
CHANNEL
L INE
RADIO
SEL .
MUTE
ON
:
PSM
Vi n_OK
Vi n_KO
Vou t
Slave 2
4W+E/M
:
DSP
TX
UNL K
RX
M TCH
TCS
S YNC
P PS
E EP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
TX
:
PWR RF HIGH
PWR FA IL
PWR RF LOW
ROS FAIL
:
POL
DEVICE
CHANNEL
L INE
RADIO
SEL .
MUTE
ON
:
LINE
In1
Out1
:
:
PSM
Vi n_OK
Vi n_KO
Vout
In2
:
DSP
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
:
RX
BUS Y N
UNLK 1
BUS Y D
UNLK 2
TX
:
PWR RF HIGH
PWR FAIL
PWR RF LOW
ROS FAIL
:
POL
DEVICE
CHANNEL
:
:
PSM
DSP
Vi n_OK
Vi n_KO
LINE
RADIO
Vou t
SEL.
-
+
TX
UNL K
RX
M TCH
TCS
S YNC
P PS
E EP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
:
TX
PWR RF HIGH
PWR FA IL
PWR RF LOW
ROS FAIL
:
POL
DEVICE
CHANNEL
L INE
RADIO
SEL .
Out2
Master
-
Slave 3
+
M UTE
In3
ON
Out3
MUTE
ON
In4
Out4
:
PSM
Vi n_OK
Vi n_KO
Vou t
Slave 4
4W+E/M
:
DSP
TX
UNL K
RX
M TCH
TCS
S YNC
P PS
E EP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
TX
:
PWR RF HIGH
PWR FA IL
PWR RF LOW
ROS FAIL
:
POL
DEVICE
CHANNEL
L INE
RADIO
SEL .
MUTE
ON
:
PSM
Vi n_OK
Vi n_KO
Vout
Slave 5
:
DSP
TX
UNLK
RX
M TCH
TCS
S YNC
P PS
E EP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
TX
:
PWR RF HIGH
PWR FA IL
PWR RF LOW
ROS FAIL
:
POL
DEVICE
CHANNEL
LINE
RADIO
SEL.
MUTE
ON
Star network
Each slave station sends the received signal to the master one. The master station performs the selection of the best
signal (voting system) and send it back to all the slave stations.
The RF signal received by antennas is summed in phase (soft diversity) and then demodulated. This signal is then
compared with other signals coming from the lines of RBS downstream.
For each signal the quality is continuously calculated and the weight to give to each signal is extracted.
∞
Page 12 of 19
Version 1v1
updated: 15/07/2009
From upper nesting RBS
BF Line 1
BF Line 2
Adaptive
line
equalizer
Adaptive
line
equalizer
X
X
Σ
. . .
BF Line N
RX
Main
Soft
diversity
RX
Diversity
To lower nesting RBS
Adaptive
line
equalizer
Nesting
delay
comp.
X
Noise
and
weigts estim.
weigting coefficients
RX enabled / forced
(from Remote Control)
Basic scheme of Soft Voting
The Voting implementation is based on a comparison of noise measured in real time on each input channel. The
measuring band is between 2700 and 3400 Hz in such a way to magnify the components of harmonic distortion and noise
2
of FM receivers, known to have a trend proportional to f .
The best signal between input lines and local receivers is selected and sent towards the master station upstream. A
"macro diversity" effect is obtained so the overall reception quality is better than a conventional network. The selection
process is repeated at every RBS until the master station who compares the signal from the whole network with the
signal received from the local RXs. The "Soft voted RX" signal of the network is sent to central office and to the stations
downstream to be transmitted. The Central Office is able to intercept the signal and has the priority over the signal to be
transmitted.
The signal from Central Office to be transmitted, is sent to the master station which forwards it to other RBS of the
network. In turn, each RBS receiving a signal from up-stream, forwards it to all lines towards RBS further downstream.
Before sending a signal to the transmitter every RBS equalizes the path in amplitude, phase and delay.
Line equalization is performed with an adaptive filtering algorithm. The Master station, when a signal to be transmitted is
not present, sends over the lines a particular digital signal, synchronized with the UTC clock, obtained from GPS receiver.
Every station measures the received signal spectral density and synthesizes the optimum filter to equalize the channel
amplitude/phase response (Adaptive line equalizer). The complete procedure requires few seconds.
The delay compensation is automatically performed from the DSP internal device together with a GPS receiver:
delay to be compensated
on the station
TX1 (more delayed)
TX2
The process is described in the following figure:
∞
Page 13 of 19
Version 1v1
updated: 15/07/2009
Line equalizer and
delay compensation
Line equalizer and
delay compensation
TX 2
TX1
Transmitter
Transmitter
Transit delay
The DSP line equalizer provides the necessary amplitude, phase and delay compensation. It extracts also the synchronism
for the RF carrier. After the equalization a delay block is inserted to compensate for Km in the RF carrier path before
reaching the planned equal field strength area.
This geometry is available also in “linear” structure where it is present a MUX (optical fiber or microwave) connection
between the base stations. In this case every base station uses a dedicated audio channel for the connection to the
Master station:
:
LI NE
:
:
P SM
:
DSP
:
:
RX
TX
:
:
P OL
DE
VI CE
V
i _
n OK
T X
BU S Y N
P WR
R F H IG H
V
i _
n KO
UNL K
RX
UN L K 1
BU S Y D
P WR
P WR
F
AI L
RF O
L W
MT C H
UN L K 2
R O S F A IL
I 1
n
O tu 1
P SM
C H AN N E L
Vn
i _
OK
Vn
i _
KO
L IN E
Vu
o t
R A D IO
:
DSP
:
:
:
RX
:
PO L
TX
D E IV C E
T X
UNK
L
BUY
S
UNK
L
N
1
P WR
P WR
F
R IH G H
F
AI L
RX
BUY
S
D
P WR
F
R
MT H
C
T S
C
UNK
L
2
R O S F A IL
Vu
o t
T CS
SYNC
P SM
C H A N NL
E
Vn
i _
OK
Vn
i _
KO
IL N E
O
L W
R A ID O
SEL .
-
:
:
:
:
RX
PO L
TX
D E IV C E
T X
UNK
L
BUS
Y
UNK
L
N
1
P WR
P WR
F
R IH G H
F
AI L
RX
BUS
Y
D
P WR
F
R
MT H
C
T S
C
UNK
L
2
R O S F A IL
C H A N NL
E
IL N E
O
L W
R A ID O
SN
YC
PS
P
EP
E
+
DSP
Vu
o t
SN
YC
PS
P
PPS
EEP
I 2
n
SEL .
EP
E
SEL .
O tu 2
Master
-
Slave 1
+
MU T E
I 3
n
ON
O tu 3
I 4
n
O tu 4
RS232
4W+E/M
MU T
E
ON
Nx
4W+E/M
RS232
4W+E/M
Nx
RS232
4W+E/M
Slave 2
MU T
E
ON
RS232
4W+E/M
N-1 x
N-2 x
4W+E/M
4W+E/M
RS232
RS232
N+1 x
RS232
Dispatcher
Control Center
In the drawing it is shown the typical connections of the base stations through a linear MUX support. Note the audio 4
wire + E/M interface for communication and the RS232 (optional) port for remote control purpose.
The slave station can also be equipped with one or more other line interfaces to realize “pipeline” or “tree” network
configuration.
∞
Page 14 of 19
Version 1v1
updated: 15/07/2009
To other
daisy chains
:
:
PSM
DSP
Vin_OK
Vin_KO
Vout
TX
UNLK
RX
MTCH
TCS
SYNC
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
:
TX
PWR RF HIGH
PWR FAIL
PWR RF LOW
ROS FAIL
:
POL
D EVICE
Slave 3
CHANNEL
:
:
PSM
DSP
Vin_OK
Vin_KO
LINE
RADIO
Vout
PPS
EEP
TX
UNLK
RX
MTCH
TCS
SYNC
:
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
TX
PWR RF HIGH
PWR FAIL
PWR RF LOW
ROS FAIL
:
POL
DEVICE
Slave 4
MUTE
ON
CH ANNEL
LINE
RADIO
PPS
EEP
SEL.
SEL.
MUTE
ON
:
LINE
In1
Out1
:
:
:
PSM
DSP
Vin_OK
Vin_KO
Vout
TX
UNLK
RX
MTC H
TC S
SYNC
:
RX
BU SY N
UNLK 1
BU SY D
UNLK 2
:
TX
:
POL
DEVIC E
PWR RF HIGH
PWR FAIL
LINE
PWR RF LOW
ROS FAIL
RADIO
PPS
EEP
In2
SEL.
CHANNEL
-
+
Out2
4W+E/ M
4W+E/ M
Master
-
+
MUTE
In3
ON
Out3
In4
Out4
:
PSM
Vin_OK
Vin_KO
Vout
Slave 2
ON
:
DSP
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
TX
:
PWR RF HIGH
PWR FAIL
PWR RF LOW
ROS FAIL
:
:
POL
D EVICE
PSM
CHANNEL
Vin_OK
Vin_KO
LINE
RADIO
Vout
SEL.
MUTE
Slave 1
:
DSP
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
:
RX
BUSY N
UNLK 1
BUSY D
UNLK 2
TX
:
PWR RF HIGH
PWR FAIL
PWR RF LOW
ROS FAIL
ON
:
POL
DEVICE
CH ANNEL
LINE
RADIO
SEL.
MUTE
Pipeline / Daisy chain network
In this case every base station performs a voting system that select the best signal from two source: the local receiver and
the signal coming from the previous (respect to the Master) base station. The best signal is sent to the following station in
the Master direction. The result is a distributed voting system.
This type of geometry is used typically where the link connection between the base stations are twisted copper pairs. The
typical applications are motorway, railway, gas/petroleum pipeline, electricity distribution, and similar ones.
OVERVIEW OF RADIO ACTIVITY BASE STATIONS
The base station family RA-XXX has been designed using the latest technologies in the Radio Frequencies and Digital
Signal Processing fields. The transceivers are “fully digital ” developed following the theory of “soft radio” in which the
modulation and demodulation processes are
performed by algorithms of
Digital Signal
Processing (DSP) .
The radio modularity, as well as the other functions
like remote control, self test, self calibration, over
temperature protection, etc, minimizes the
management and maintenance costs of the
equipment. The receiver section has excellent
linearity characteristics, which allow that more
radio stations work on the same frequency band.
These devices are fully programmable and easy to
configure both in Hw and SW, consequently this will
provide optimum solutions for any radio communication exigencies from a single fixed station to complex networks with
tens of base stations.
All DSP module have a AUDIO LAN connection bus that easy permits very flexible composition of system building blocks to
realize virtual infinite solutions.
The transceivers of RA-XXX family can support a wide set of options for analogical line interfaces (2/4wires +E&M,
telephone interfaces, echo canceller, tone decoder, …), digital audio matrix, signaling encoder/decoder (CCIR, ZVEI,
DTMF, … ), fast modem for data transmission, double receivers for “soft antenna diversity”, voting system, multi-mode
synchronism recovering and automatic phase and amplitude line equalization for simulcast application, etc.
Using a PC, via optional SW, it is possible to set-up most of the parameters (fine frequency adjust, corner frequency of
digital filters, RF deviation, audio level in/out, PTT pilot tone, …). This SW permits also a large view of the status of the
transceiver (audio loop test TX=>RX, current consumption, temperature, …) and a set of measurements (audio level,
frequency, distortion, delay, received field, RF power, …).
The radio electric functions of the device comply with the requests foreseen by the legislations ETS 300-086 e ETS 300113.
∞
Page 15 of 19
Version 1v1
updated: 15/07/2009
The transceiver RA-XXX has a compact structure, is made up by single modular units inside metallic shielded modules so
called EUROCARD with 220 mm format, assembled in SUBRACK 19”. The dimensions of the sub-rack are : 3HEx84TE,
width 280 mm.
The function units are implemented as plug-in modules which are interconnected on the back plane located at the rear of
the unit. It consists in some PCB (depend of use) provided with signal and supply connectors.
The shielding system is very efficient and allows a quick access to the PCB, removing the slipping cover without screws.
The standard power supply of the device is by battery at 13,5Vcc, 5A negative grounding. In case of functioning with
other energy fonts are available more types of isolated DC/DC or AC/DC converters with battery charger.
Remote control
The base station has a first useful level of remote control: it sends automatically alarm messages to the terminals directly.
Every base station sends to the selected “maintenance group” of terminals a short message to inform in real time the
user about the major failure happened (low power supply, IP connection fail, synchronism fail, etc.). In most cases this
feature is enough to survey the correct functioning of the network by the final users.
In addition, Radio Activity had developed a powerful tools for Network Management and remote surveillance and control
based on Windows (XP/VISTA). A lot of functions are implemented: software download, RX/TX disable, alarms report,
audio level control, radio measurements, RF power, telephone to radio setup, and much more …
All the parameters setup are remotely modifiable by the user through the remote control SW pakage.
The transceiver has a serial port RS232 for control purpose. It can be optionally remote controlled by the “RA_MANAGER”
(analog) or “DMR_MANAGER ” (digital) SW packages, using internal or external modem (typical a GSM data module).
∞
Page 16 of 19
Version 1v1
updated: 15/07/2009
These package supports the remote controlling functions for the supervision of network made by transceivers RA-XXX.
This software includes the package for local TRX parameters set-up and diagnostic.
The main functions of the remote control are:
∞
∞
∞
∞
∞
∞
Transceiver calibration and self test
Full transceiver control (RF Channel, RF Power, equalization parameters, …)
Audio lines supervision (nominal level monitoring, break detect, audio quality analysis, equalization control, … )
Robust software down-load capability on all microcontrollers and DSP of the base station
Mobile modulation analysis
Interference monitoring
The following windows explain few remote control operation.
The Remote control facility permits the remote connections with some different way:
∞ Local serial port
∞ TCP/IP with specific interface
∞ through GSM / PSTN modem directly connected to the stations. In this case the remote control doesn’t disturb
the current communications and is available also when the main connection links are out of service.
∞ through the internal audio modem FSK in the same audio channel of the simulcast network
∞ in mixed mode, through GSM / PSTN modem or through serial port or through TCP/IP and, from that, bouncing
with the internal FSK modem to the desired station.
The following drawings explains some of the most common remote control configurations.
∞
Page 17 of 19
Version 1v1
updated: 15/07/2009
GSM on master station
:
:
:
:
:
:
DEVI CE
V n
i _OK
V n
i _KO
Vout
TX
UNLK
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
RX
MTC H
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
:
:
-
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
TCS
SYNC
PPS
EEP
+
FFSK internal modems
:
D EVIC E
V u
ot
-
S EL.
:
CHAN NEL
Vi n_OK
Vi n_KO
TCS
SYN C
PPS
EEP
C HANNE L
-
SEL.
+
-
M UTE
+
+
MU TE
ON
ON
:
:
:
:
:
:
DEVI CE
V n
i _OK
V n
i _KO
Vout
TX
UNLK
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
RX
MTC H
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
:
:
:
D EVIC E
V u
ot
-
S EL.
:
CHAN NEL
Vi n_OK
Vi n_KO
TCS
SYN C
PPS
EEP
-
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
TCS
SYNC
PPS
EEP
+
:
:
:
:
:
DEVI CE
Vout
TX
UNLK
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
RX
MTC H
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
:
:
-
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
TCS
SYNC
PPS
EEP
+
-
on narrowband radio linlks
+
+
MU TE
ON
:
:
:
:
:
:
DEVI CE
V n
i _OK
V n
i _KO
Vout
TX
UNLK
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
RX
MTC H
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
:
:
:
D EVIC E
V u
ot
-
S EL.
:
CHAN NEL
Vi n_OK
Vi n_KO
TCS
SYN C
PPS
EEP
-
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
TCS
SYNC
PPS
EEP
+
:
:
:
:
:
:
DEVI CE
Vout
TX
UNLK
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
RX
MTC H
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
:
:
-
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
TCS
SYNC
PPS
EEP
+
:
-
:
:
:
:
:
+
DEVI CE
V n
i _OK
V n
i _KO
+
Vout
MU TE
ON
TX
UNLK
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
RX
MTC H
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
TCS
SYN C
PPS
EEP
:
:
:
:
:
DEVI CE
Vout
:
:
DEVI CE
Vout
LI NE
RX
MTC H
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
TCS
SYN C
PPS
EEP
-
S EL.
:
:
:
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
D EVIC E
Vi n_OK
Vi n_KO
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
V u
ot
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
-
C HANNE L
:
:
D EVIC E
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
-
:
:
:
V n
i _OK
V n
i _KO
Vout
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
:
I n1
In1
I n1
V n
i _OK
V n
i _KO
O ut1
Out 1
:
O ut1
:
Vout
:
:
:
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
:
:
:
V u
ot
In2
I n2
Out 2
O ut2
In3
I n3
Out 3
In3
O ut3
Out 3
V u
ot
-
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
+
In4
I n4
Out 4
O ut4
:
:
:
-
:
DEVI CE
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
RX
MTC H
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
:
:
:
-
D EVIC E
Vi n_OK
Vi n_KO
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
V u
ot
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
TCS
SYNC
PPS
EEP
+
:
Base station
(SLAVE)
:
:
:
:
DEVI CE
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
:
:
-
D EVIC E
Vi n_OK
Vi n_KO
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
V u
ot
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
TCS
SYNC
PPS
EEP
+
Vout
:
:
:
:
PW RR FHI GH
PW RFAI L
LI NE
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
:
:
LI NE
PW RR FLOW
ROS FAI L
RA DIO
-
:
:
:
V u
ot
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
TCS
SYNC
PPS
EEP
+
V u
ot
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
M UTE
+
MU TE
ON
:
:
I n1
In1
O ut1
:
Out 1
:
In1
I n1
Out 1
Out1
I n2
In2
O ut2
Out 2
In2
I n2
Out 2
Out2
I n3
In3
In3
I n3
O ut3
Out 3
Out 3
Out3
I n4
In4
In4
I n4
O ut4
Out 4
Out 4
Out4
:
:
Vin _OK
Vin _KO
Vout
:
+
:
:
:
-
:
:
:
:
:
DEVI CE
TX
UNLK
RX
MTC H
TCS
SYN C
PPS
EEP
BUSY N
UNLK 1
BUSY D
UNLK 2
PW RR FHI GH
PW RFAI L
PW RR FLOW
ROS FAI L
:
:
:
Vi n_OK
Vi n_KO
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
BU SYN
U NLK1
BU SYD
U NLK2
V u
ot
-
+
I n4
Out4
:
TX
UNLK
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
RX
MTC H
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
Vout
ON
PWR RF HI GH
PWR FAI L
PWR RF LOW
ROS FAIL
:
:
:
C HANNE L
LIN E
D EVIC E
Vi n_OK
Vi n_KO
V u
ot
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
TCS
SYNC
PPS
EEP
+
:
:
PW RR FHI GH
PW RFAI L
LI NE
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
:
:
:
:
D EVIC E
V u
ot
-
S EL.
-
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
TCS
SYNC
PPS
EEP
+
-
SEL.
-
:
+
V n
i _OK
V n
i _KO
+
Vout
:
TX
UNLK
RX
MTC H
TCS
SYN C
:
BUSY N
UNLK 1
BUSY D
UNLK 2
:
PW RR FHI GH
PW RFAI L
PW RR FLOW
ROS FAI L
:
:
:
:
Vi n_OK
Vi n_KO
TX
UNLK
RX
MTCH
TCS
SYNC
BU SYN
U NLK1
BU SYD
U NLK2
:
D EVIC E
V u
ot
-
S EL.
:
CHAN NEL
RA DIO
-
PWR RF HI GH
PWR FAI L
PWR RF LOW
ROS FAIL
RAD IO
Vout
PWR RF HI GH
PWR FAI L
PWR RF LOW
ROS FAIL
RAD IO
:
PPS
EEP
+
-
SEL.
+
-
:
:
:
:
:
DEVI CE
+
V n
i _OK
V n
i _KO
-
+
Vout
MU TE
TX
UNLK
BUSY N
UNLK 1
PW RR FHI GH
PW RFAI L
LI NE
RX
MTC H
BUSY D
UNLK 2
PW RR FLOW
ROS FAI L
RA DIO
-
:
:
:
D EVIC E
V u
ot
-
S EL.
:
CHAN NEL
Vi n_OK
Vi n_KO
TCS
SYN C
PPS
EEP
ON
TX
UNLK
BU SYN
U NLK1
PWR RF HI GH
PWR FAI L
LIN E
RX
MTCH
BU SYD
U NLK2
PWR RF LOW
ROS FAIL
RAD IO
TCS
SYNC
PPS
EEP
+
-
:
:
O ut1
In1
In2
In3
Out 3
In4
Out 4
I n1
I n2
O ut2
I n3
O ut3
I n4
O ut4
:
In1
Out 1
In2
Out 2
In3
Out 3
In4
Out 4
:
I n1
O ut1
:
+
ON
:
V n
i _OK
V n
i _KO
Vout
:
GSM modem
I n2
O ut2
I n3
+
MU TE
ON
Out 2
C HANNE L
-
SEL.
+
M UTE
Out 1
+
C HANNE L
LIN E
M UTE
ON
+
MU TE
ON
:
D EVIC E
V u
ot
-
S EL.
:
CHAN NEL
RA DIO
PPS
EEP
:
BU SYN
U NLK1
BU SYD
U NLK2
-
SEL.
+
:
TX
UNLK
RX
MTCH
TCS
SYNC
C HANNE L
LIN E
PPS
EEP
+
M UTE
:
Vi n_OK
Vi n_KO
+
LI NE
DEVI CE
+
MU TE
ON
MU TE
:
LI NE
C HANNE L
-
SEL.
+
M UTE
PPS
EEP
:
PW RR FHI GH
PW RFAI L
PW RR FLOW
ROS FAI L
+
:
CHAN NEL
Vi n_OK
Vi n_KO
BUSY N
UNLK 1
TCS
SYN C
PPS
EEP
ON
:
BUSY N
UNLK 1
BUSY D
UNLK 2
+
MU TE
:
TX
UNLK
RX
MTC H
ON
ON
:
TX
UNLK
RX
MTC H
TCS
SYN C
C HANNE L
-
SEL.
+
ON
:
DEVI CE
Vout
RAD IO
+
M UTE
:
V n
i _OK
V n
i _KO
The control signals coming through GSM / PSTN
modem and, from that, bouncing with the internal FSK
modem to the desired station. The control signals from
Master to slave are audible on the mobile terminals as
short (300-500 ms) data telegrams. The telegrams
appear only when the remote control poll the stations
(for example every 6/8 hours).
Mobile assistance or (if required) Factory can directly
access the base station control port via telephone line.
Software downloading is available on master station
only.
:
CHAN NEL
-
S EL.
-
:
V n
i _OK
V n
i _KO
DEVI CE
-
Out3
:
D EVIC E
RA DIO
S EL.
:
CHAN NEL
LI NE
I n3
M UTE
+
ON
Out2
In 4
Out 4
ON
Base station
(MASTER)
+
MU TE
ON
Vout
I n2
In 3
Out 3
In 4
Out 4
:
DEVI CE
V n
i _OK
V n
i _KO
1xRS232
C HANNE L
-
SEL.
+
M UTE
V n
i _OK
V n
i _KO
Out1
In 2
Out 2
In 3
Out 3
I n4
O ut4
ON
Vout
TCS
SYNC
PPS
EEP
+
Out 1
In 2
Out 2
I n3
O ut3
Base station
(SLAVE)
+
-
+
D EVIC E
Vi n_OK
Vi n_KO
-
Out 1
I n2
O ut2
C HANNE L
-
SEL.
+
ON
:
CHAN NEL
-
S EL.
O ut1
+
+
:
D EVIC E
Vi n_OK
Vi n_KO
-
:
DEVI CE
PW RR FHI GH
PW RFAI L
BUSY D
UNLK 2
:
Vin_OK
Vin_KO
C HANNE L
-
:
CHAN NEL
-
S EL.
MU TE
:
BUSY N
UNLK 1
TCS
SYN C
PPS
EEP
:
:
BUSY N
UNLK 1
TCS
SYN C
PPS
EEP
TCS
SYN C
PPS
EEP
:
TX
UNLK
RX
MTC H
ON
I n1
MU TE
:
TX
UNLK
RX
MTC H
ON
:
Vout
:
In 1
C HANNE L
-
SEL.
+
M UTE
ON
V n
i _OK
V n
i _KO
:
In 1
:
CHAN NEL
-
S EL.
:
:
I n1
ON
:
DEVI CE
V n
i _OK
V n
i _KO
-
SEL.
+
:
+
+
:
CHAN NEL
-
S EL.
M UTE
TCS
SYN C
PPS
EEP
+
-
:
TX
UNLK
TCS
SYN C
PPS
EEP
TX
UNLK
C HANNE L
-
SEL.
ON
:
RX
MTC H
RAD IO
MU TE
:
Vout
:
LIN E
PWR RF LOW
ROS FAIL
ON
ON
Vout
Typical star network “RF LINKED” controlled via one
GSM Modem placed on Master station.
:
PWR RF HI GH
PWR FAI L
BU SYD
U NLK2
ON
+
MU TE
ON
V n
i _OK
V n
i _KO
V n
i _OK
V n
i _KO
-
SEL.
I n3
I n4
O ut4
:
BU SYN
U NLK1
+
C HANNE L
TCS
SYNC
PPS
EEP
+
O ut3
In4
Out 4
:
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
+
ON
:
D EVIC E
Vi n_OK
Vi n_KO
:
:
CHAN NEL
-
S EL.
M UTE
I n2
O ut2
+
+
D EVIC E
Vi n_OK
Vi n_KO
-
:
TX
UNLK
RX
MTC H
TCS
SYN C
PPS
EEP
:
:
CHAN NEL
-
S EL.
M UTE
:
DEVI CE
Vout
C HANNE L
-
SEL.
-
:
TX
UNLK
RX
MTC H
TCS
SYN C
PPS
EEP
:
V n
i _OK
V n
i _KO
In2
RAD IO
DEVI CE
In1
LIN E
PWR RF LOW
ROS FAIL
MU TE
:
+
+
MU TE
Out 2
D EVIC E
PWR RF HI GH
PWR FAI L
BU SYD
U NLK2
TCS
SYNC
PPS
EEP
+
ON
Out 1
:
BU SYN
U NLK1
RX
MTCH
ON
+
MU TE
ON
:
-
SEL.
+
:
TX
UNLK
V u
ot
C HANNE L
-
SEL.
+
M UTE
ON
:
Vi n_OK
Vi n_KO
+
:
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
+
M UTE
ON
TCS
SYNC
PPS
EEP
+
:
V u
ot
-
S EL.
:
CHAN NEL
CHAN NEL
Vi n_OK
Vi n_KO
TX
UNLK
RX
MTC H
TCS
SYN C
PPS
EEP
:
PW RR FHI GH
PW RFAI L
+
M UTE
ON
:
V n
i _OK
V n
i _KO
:
BUSY N
UNLK 1
:
CHAN NEL
-
S EL.
-
:
TX
UNLK
+
C HANNE L
-
SEL.
+
M UTE
:
+
MU TE
ON
:
D EVIC E
V u
ot
-
S EL.
:
CHAN NEL
Vi n_OK
Vi n_KO
TCS
SYN C
PPS
EEP
ON
C HANNE L
-
SEL.
+
M UTE
ON
V n
i _OK
V n
i _KO
+
+
C HANNE L
-
SEL.
+
M UTE
V n
i _OK
V n
i _KO
C HANNE L
MU TE
ON
:
D EVIC E
V u
ot
-
S EL.
:
CHAN NEL
Vi n_OK
Vi n_KO
TCS
SYN C
PPS
EEP
ON
-
SEL.
+
M UTE
ON
:
V n
i _OK
V n
i _KO
ON
O ut3
I n4
O ut4
Base station
(SLAVE)
:
:
I n1
In1
O ut1
Out 1
:
In1
I n1
Out 1
Out1
I n2
In2
O ut2
Out 2
In2
I n2
Out 2
Out2
I n3
In3
In3
I n3
O ut3
Out 3
Out 3
Out3
I n4
In4
In4
I n4
O ut4
Out 4
Out 4
Out4
:
:
Vin_OK
Vin_KO
Vout
ON
Base station
(SLAVE)
PSTN
Control
∞
Center
Factory
Mobile
Assistance
Wired station on MUX links
Base station
(SLAVE)
:
:
:
:
:
:
DEVICE
Vi n_OK
Vi n_KO
Vou
t
TX
UN K
L
BUSY N
UNLK 1
PW R RFHI GH
PW R FAIL
RX
M TCH
BUSY D
UNLK 2
PW R RFLOW
R OSFAI L
:
:
:
DEVI CE
Vin _OK
Vin _KO
RADIO
Vout
TX
UNLK
B USYN
U NLK1
PWR RF HIG H
PWR FAI L
LINE
RX
MTCH
B USYD
U NLK2
PWR RF LOW
ROS FAIL
RADI O
-
SEL.
PW R RFHI GH
PW R FAIL
PW R RFLOW
R OSFAI L
:
:
:
Vout
+
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
B USYN
U NLK1
B USYD
U NLK2
PWR RF HIG H
PWR FAI L
PWR RF LOW
ROS FAIL
:
:
BUSY N
UNLK 1
BUSY D
UNLK 2
:
PW R RFHI GH
PW R FAIL
PW R RFLOW
R OSFAI L
-
:
:
Vout
+
-
:
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
:
:
B USYN
U NLK1
B USYD
U NLK2
:
:
:
:
:
TX
UN K
L
BUSY N
UNLK 1
PW R RFHI GH
PW R FAIL
IL NE
RX
M TCH
BUSY D
UNLK 2
PW R RFLOW
R OSFAI L
RADIO
:
Vou
t
-
SEL.
+
-
SEL.
-
:
:
:
:
BUSY N
UNLK 1
BUSY D
UNLK 2
:
PW R RFHI GH
PW R FAIL
PW R RFLOW
R OSFAI L
:
DEVI CE
TX
UNLK
B USYN
U NLK1
PWR RF HIG H
PWR FAI L
LINE
Vout
RX
MTCH
B USYD
U NLK2
PWR RF LOW
ROS FAIL
RADI O
:
:
:
I n1
In 1
Out1
Out1
Out 1
I n2
I n2
In 2
Out2
Out2
Out 2
I n3
I n3
:
In 3
Out3
:
:
:
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
B USYN
U NLK1
B USYD
U NLK2
:
:
Out 3
I n4
I n4
In 4
Out4
Out4
Out 4
:
In 1
Out1
IL NE
PW R RFLOW
R OSFAI L
RADIO
:
:
:
:
:
Vout
1xRS232
:
BUSY N
UNLK 1
BUSY D
UNLK 2
:
PW R RFHI GH
PW R FAIL
PW R RFLOW
R OSFAI L
:
DEVI CE
B USYN
U NLK1
PWR RF HIG H
PWR FAI L
LINE
RX
MTCH
B USYD
U NLK2
PWR RF LOW
ROS FAIL
RADI O
:
:
:
:
:
:
:
:
:
In 1
In 1
In 1
In 1
Out 1
Out 1
O tu 1
Out 1
In 2
In 2
In 2
In 2
Out 2
Out 2
O tu 2
Out 2
In 3
In 3
Out 3
O tu 3
In 3
:
:
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
:
:
B USYN
U NLK1
B USYD
U NLK2
PW R RFHI GH
PW R FAIL
IL NE
BUSY D
UNLK 2
PW R RFLOW
R OSFAI L
RADIO
:
:
:
Vout
PWR RF HIG H
PWR FAI L
LINE
B USYD
U NLK2
PWR RF LOW
ROS FAIL
RADI O
:
TX
UN K
L
RX
M TCH
TCS
SYN C
PPS
EEP
:
BUSY N
UNLK 1
BUSY D
UNLK 2
:
PW R RFHI GH
PW R FAIL
PW R RFLOW
R OSFAI L
:
:
:
:
:
In 1
In 1
In 1
In 1
Out 1
O tu 1
Out 1
In 2
In 2
In 2
In 2
Out 2
Out 2
O tu 2
Out 2
In 3
Out 3
:
:
:
In 3
O tu 3
In 3
:
:
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
:
:
B USYN
U NLK1
B USYD
U NLK2
PW R RFHI GH
PW R FAIL
IL NE
BUSY D
UNLK 2
PW R RFLOW
R OSFAI L
RADIO
-
:
:
:
TX
UNLK
B USYN
U NLK1
PWR RF HIG H
PWR FAI L
LINE
Vout
RX
MTCH
B USYD
U NLK2
PWR RF LOW
ROS FAIL
RADI O
PPS
EEP
-
:
:
:
:
In 1
In 1
In 1
In 1
Out 1
Out 1
O tu 1
Out 1
In 2
In 2
In 2
In 2
Out 2
Out 2
O tu 2
Out 2
In 3
Out 3
In 3
Out 3
In 3
O tu 3
In 3
In 4
In 4
In 4
In 4
In 4
In 4
In 4
In 4
In 4
Out 4
Out 4
Out 4
O tu 4
Out 4
Out 4
Out 4
O tu 4
Out 4
Link+MUX
:
+
:
Vin _OK
Vin _KO
Vout
ON
Out 3
In 4
O tu 4
Microwave/optical f iber
+
In 4
Link+MUX
-
SEL.
MUTE
ON
Out 4
C HANNEL
TCS
SYNC
+
In 4
1xRS232
+
DEVI CE
Vin _OK
Vin _KO
+
:
Vout
+
:
CHAN NEL
-
-
ON
-
SEL.
MUTE
Out 4
Link+MUX
RADI O
MUTE
Vin _OK
Vin _KO
C HANNEL
LINE
SEL.
+
Out 3
+
:
PWR RF HIG H
PWR FAI L
PWR RF LOW
ROS FAIL
ON
:
BUSY N
UNLK 1
RX
M TCH
+
MUTE
+
:
TX
UN K
L
PPS
EEP
+
-
SEL.
DEVI CE
Vout
+
ON
Out 1
Out 3
:
Vin _OK
Vin _KO
-
SEL.
MUTE
TCS
SYN C
-
+
C HANNEL
RADI O
CHAN NEL
RADIO
DEVICE
Vou
t
-
SEL.
MUTE
+
:
LINE
-
IL NE
C HANNEL
Vi n_OK
Vi n_KO
PPS
EEP
In 3
ON
:
DEVI CE
B USYN
U NLK1
RX
MTCH
:
PWR RF HIG H
PWR FAI L
PWR RF LOW
ROS FAIL
-
:
TX
UNLK
Vout
:
B USYN
U NLK1
B USYD
U NLK2
ON
+
ON
C HANNEL
-
SEL.
-
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
+
:
Vin _OK
Vin _KO
RADI O
:
DEVI CE
MUTE
ON
Vin _OK
Vin _KO
+
LINE
PWR RF LOW
ROS FAIL
Vout
+
+
DEVICE
Vou
t
+
-
TCS
SYNC
-
Out 3
:
Vi n_OK
Vi n_KO
-
SEL.
CHAN NEL
-
SEL.
:
PWR RF HIG H
PWR FAI L
B USYD
U NLK2
MUTE
:
Vin _OK
Vin _KO
-
SEL.
C HANNEL
RADI O
:
B USYN
U NLK1
PPS
EEP
ON
RADIO
LINE
MUTE
:
TX
UNLK
RX
MTCH
TCS
SYNC
+
CHAN NEL
IL NE
-
MUTE
:
BUSY N
UNLK 1
RX
M TCH
Vout
+
:
DEVICE
:
PWR RF HIG H
PWR FAI L
PWR RF LOW
ROS FAIL
:
DEVI CE
Vin _OK
Vin _KO
-
-
:
PW R RFHI GH
PW R FAIL
PW R RFLOW
R OSFAI L
ON
:
CHAN NEL
RADIO
SEL.
:
BUSY N
UNLK 1
BUSY D
UNLK 2
ON
+
ON
+
:
IL NE
:
TX
UN K
L
RX
M TCH
TCS
SYN C
PPS
EEP
+
DEVI CE
Vout
+
:
TX
UN K
L
PW R RFLOW
R OSFAI L
MUTE
Vou
t
+
MUTE
Vin _OK
Vin _KO
PPS
EEP
+
PW R RFHI GH
PW R FAIL
BUSY D
UNLK 2
PPS
EEP
Vi n_OK
Vi n_KO
-
SEL.
CHAN NEL
-
SEL.
MUTE
TCS
SYN C
-
BUSY N
UNLK 1
TCS
SYN C
:
C HANNEL
RADI O
-
RADIO
DEVICE
Vou
t
-
SEL.
MUTE
:
TX
UN K
L
RX
M TCH
ON
DEVI CE
IL NE
C HANNEL
Vi n_OK
Vi n_KO
PPS
EEP
Vou
t
+
:
LINE
-
:
TX
UNLK
Vout
:
DEVICE
Vi n_OK
Vi n_KO
+
-
:
PWR RF HIG H
PWR FAI L
PWR RF LOW
ROS FAIL
ON
+
ON
Out 3
:
TX
UN K
L
RX
M TCH
TCS
SYN C
PPS
EEP
:
C HANNEL
-
SEL.
:
B USYN
U NLK1
B USYD
U NLK2
+
In 3
ON
In 4
RADI O
:
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
+
DEVICE
Vou
t
+
:
LINE
PWR RF LOW
ROS FAIL
Vout
+
MUTE
ON
Vin _OK
Vin _KO
+
:
Vin _OK
Vin _KO
In 2
Out3
Out4
:
Vi n_OK
Vi n_KO
-
TCS
SYNC
-
:
PWR RF HIG H
PWR FAI L
B USYD
U NLK2
MUTE
:
Vin _OK
Vin _KO
-
SEL.
C HANNEL
-
SEL.
MUTE
CHAN NEL
-
SEL.
:
B USYN
U NLK1
+
CHAN NEL
RADIO
RADI O
:
TX
UNLK
RX
MTCH
PPS
EEP
+
:
IL NE
:
PW R RFHI GH
PW R FAIL
BUSY D
UNLK 2
Vout
TCS
SYNC
:
PW R RFHI GH
PW R FAIL
PW R RFLOW
R OSFAI L
-
LINE
MUTE
Out2
In 3
:
PWR RF HIG H
PWR FAI L
PWR RF LOW
ROS FAIL
ON
:
DEVI CE
Vin _OK
Vin _KO
-
SEL.
:
BUSY N
UNLK 1
BUSY D
UNLK 2
ON
+
:
BUSY N
UNLK 1
RX
M TCH
:
CHAN NEL
RADIO
Base station
(SLAVE)
ON
TX
UN K
L
RX
M TCH
TCS
SYN C
PPS
EEP
+
DEVI CE
+
ON
I n1
Out3
:
TX
UN K
L
+
MUTE
Vin _OK
Vin _KO
Vout
-
SEL.
MUTE
+
:
IL NE
-
:
DEVICE
Vou
t
-
SEL.
CHAN NEL
RADIO
PPS
EEP
+
PW R RFLOW
R OSFAI L
Vi n_OK
Vi n_KO
RADI O
-
TCS
SYN C
-
PW R RFHI GH
PW R FAIL
BUSY D
UNLK 2
MUTE
:
C HANNEL
LINE
DEVICE
Vou
t
-
SEL.
MUTE
ON
BUSY N
UNLK 1
PPS
EEP
+
:
DEVI CE
IL NE
C HANNEL
Vi n_OK
Vi n_KO
PPS
EEP
+
:
TX
UN K
L
RX
M TCH
TCS
SYN C
:
PWR RF HIG H
PWR FAI L
PWR RF LOW
ROS FAIL
ON
-
:
Vin _OK
Vin _KO
+
MUTE
Vou
t
+
ON
:
B USYN
U NLK1
B USYD
U NLK2
TCS
SYNC
PPS
EEP
:
TX
UN K
L
RX
M TCH
TCS
SYN C
PPS
EEP
:
DEVICE
Vi n_OK
Vi n_KO
-
MUTE
ON
:
C HANNEL
-
SEL.
MUTE
+
MUTE
CHAN NEL
TCS
SYN C
RADI O
:
TX
UNLK
RX
MTCH
TCS
SYNC
PPS
EEP
+
+
DEVICE
Vi n_OK
Vi n_KO
RADI O
:
LINE
PWR RF LOW
ROS FAIL
:
Vin _OK
Vin _KO
Vout
-
SEL.
C HANNEL
LINE
-
:
DEVICE
Vou
t
:
PWR RF HIG H
PWR FAI L
B USYD
U NLK2
+
CHAN NEL
RADIO
ON
:
B USYN
U NLK1
PPS
EEP
+
:
IL NE
-
:
PWR RF HIG H
PWR FAI L
PWR RF LOW
ROS FAIL
+
ON
:
TX
UNLK
RX
MTCH
TCS
SYNC
:
PW R RFHI GH
PW R FAIL
PW R RFLOW
R OSFAI L
DEVI CE
Vin _OK
Vin _KO
-
SEL.
MUTE
Vout
-
SEL.
:
BUSY N
UNLK 1
BUSY D
UNLK 2
ON
CHAN NEL
RADIO
:
DEVI CE
Vin _OK
Vin _KO
Base station
(MASTER)
ON
TX
UN K
L
RX
M TCH
TCS
SYN C
PPS
EEP
+
MUTE
Vi n_OK
Vi n_KO
+
IL NE
:
CHAN NEL
RADIO
-
Vou
t
-
SEL.
:
DEVICE
Vi n_OK
Vi n_KO
RADI O
ON
DEVICE
TX
UN K
L
RX
M TCH
TCS
SYN C
PPS
EEP
:
IL NE
:
C HANNEL
LINE
+
:
PW R RFLOW
R OSFAI L
MUTE
:
DEVI CE
Vin _OK
Vin _KO
-
MUTE
ON
PW R RFHI GH
PW R FAIL
BUSY D
UNLK 2
+
ON
:
CHAN NEL
RADIO
-
Vou
t
BUSY N
UNLK 1
PPS
EEP
+
:
IL NE
SEL.
ON
:
TX
UN K
L
RX
M TCH
TCS
SYN C
MUTE
ON
:
DEVICE
Vi n_OK
Vi n_KO
Vou
t
-
SEL.
+
:
BUSY N
UNLK 1
BUSY D
UNLK 2
:
DEVICE
Vi n_OK
Vi n_KO
PPS
EEP
+
MUTE
:
TX
UN K
L
RX
M TCH
TCS
SYN C
PPS
EEP
:
C HANNEL
TCS
SYNC
PPS
EEP
:
Vou
t
:
:
CHAN NEL
IL NE
TCS
SYN C
ON
Vi n_OK
Vi n_KO
Base station
(SLAVE)
NxRS232
Serial to
Ethernet
converter
TCP/IP LAN
Control
Center
Radio Activity
∞ RA-MD1
TCP/IP modem
∞
Factory
Mobile
Assistance
PSTN
Typical simulcast analog network “WIRED” controlled via serial ports carried out by MUX.
The serial port control signals coming through the MUX link to the master (or another) station. A serial to Ethernet
converter connects the serial ports to the LAN /TCP-IP internal network. The PC with remote control package is connected
via LAN to the serial converter and, from that, it can test the desired station. The control signals are not audible on the
mobile terminals. Mobile assistance or (if required) Factory can directly access the base station control port via telephone
line with the benefit of Radio Activity TCP-IP modem RA-MD1.
Software downloading is available on all stations.
∞
Page 18 of 19
Version 1v1
updated: 15/07/2009
ENGINEERING SPECIFICATIONS
Tone generator and audio analyzer for audio lines test
Frequency bands
UHF – HH
865-925 MHz
UHF – H
410-440 MHz
UHF – L
440-470 MHz
VHF – H
146-174 MHz
VHF – L
68-88 MHz
Channels managements
Bandwidth
12,5/20/25 KHz
Number of channels
199
Commutation band (without duplexer)
Band
TX
Transmitter
Module output power
RF final transistor
protection to high
temperature
1/5/10/15/20/25 W
85°C +/- 5°C
progressively reducing the RF
power
Possible modulation
Modulation bandwidth
Synthesis step
Transmitting duty cycle
ROS protection
FM, PM, GFSK,4FSK
300 .. 3400 Hz
6,25 KHz
Continued 100%
Min.10’ in short circuit as well
as in open circuit
Adjacent channel noise
-75 dBc @25KHz
-65 dBc @12.5KHz
FM distortion
Noise
< 1.5 %
-56 dBp @25KHz
-50 dBp @12.5KHz
RX
UHF – H
30 MHz
14 MHz
UHF – L
30 MHz
12 MHz
VHF – H
28 MHz
28 MHz
VHF – L
20 MHz
20 MHz
Receiver
Climatic conditions
Functioning temp.
-20 / +55° C
Storage temp.
-40 / +70° C
Power supply
Nominal voltage
Protections
Transmission consumption
Reception consumption
12/24/48 Vcc
Reverse Voltage
Over Voltage
Under Voltage
Short circuit
55 W @20W RF
8W
Dimension
128 x 426 x 280 mm
Rack
Maximum sensitivity
Operating maximum input
Maximum input without
permanent damages
Reception mode
Received signal band
Synthesis step
Co-channel protection
Adjacent channel selectivity
Blocking protection
Intermodulation protection
Intercept 3° order IP3in
Distortion
19” x 84 TE x 280 mm
Single transceiver
½ Rack 19”
Noise
-113 dBm @20 dBp SINAD
-121dBm @5% BER (with
diversity)
-10 dBm
+20 dBm
Vectorial I e Q
0..3400 Hz +/- 1 dB
6,25 KHz
8 dB @25 KHz
12 dB @12.5KHz
73 dB @25 KHz
62 dB @12.5 KHz
80 dB
75 dB
+15 dBm
<2 %
-53 dBp @25 KHz
-47 dBp @12.5 KHz
-60 dBp (with voice search
option)
Special functions
Frequency synchronism recovery from many source: audio
tone, GPS, digital, external source
Time synchronism recovery from GPS (pps) for automatic
adaptive line equalization
Multi-channels audio voting system
Multi-receivers assembly
Radio to telephone automatic interface via selective call
Audio line interface 2/4 wire + E&M
Echo cancellation on audio line
Telephone interface user or line side
Digital diversity receiver with soft diversity reception
Internal remote control modem FFSK 2Kb/s
Start up auto calibration and internal test
∞
Remote control connections
through local RS232 V.24 serial port
through TCP/IP port
through GSM / PSTN modem directly connected to the
stations
through the internal audio modem FSK in the same audio
channel of the simulcast network
in mixed mode, through GSM / PSTN modem or through
serial port or through TCP/IP and, from that, bouncing with
the internal FSK/4FSK modems to the desired station
Page 19 of 19
Version 1v1

Radio Activity S.r.l. Simulcast Networks Overview

Transcript

Documenti analoghi

Reactive Oxygen Species: Friends and Foes of Signal Transduction