FM Transmitters

Air-Cooled ETLFM Series
New Technologies and innovative equipment manufacturing
FM Transmitters
High power, medium power, low power, low power integrated
www.eurotel.it
www.eurotel.it
EuroTel Air-Cooled ETLFM Transmitter Series Power Levels
High power FM Transmitters
ETLFM4E01
ETLFM4E02
ETLFM4E04
ETLFM4E08
Number of amplifiers
1
2
4
8
Number of cabinets
1
1
1
2
2.5 kW
5 kW
10 kW
20 kW
Output power *
Medium Power FM Transmitters
Low Power FM Transmitters
ETLFM2E01
ETLFM1E01
Number of amplifiers
1
Number of amplifiers
Number of cabinets
1
Number of cabinets
Output power *
1.4 kW
1
1
Output power *
0.7 kW
Low Power Integrated FM Transmitters
ETL3100FMG
ETL3100FMF
ETL3100FMI
ETL3100FME
Number of amplifiers
1
1
1
1
Mainframe units
3
3
2
2
Output power *
500W
250W
100W
50W
*Before bandpass filter.
Low Power FM Transmitter 3U Mainframe
ETLFM
Amplifier module
Features
Product details
• VHF FM power amplifier
• Fully broadband power amplifier modules — 87.5 to 108
MHz instantaneous band
• Air-Cooled
• LDMOS transistor based technology ensuring high output
power and efficiency
• Four board amplifier, with independent power supply unit
each
• Rugged, reliable and highly redundant design
• Final amplifiers voltage supply proportional to RF output
power and frequency dependent
• Multifunction metering and monitoring for main amplifier
parameters
Equipped with the latest high efficiency, high power gain
LDMOS technology, the ETLFM power amplifiers feature
excellent efficiency and reliability.
The ETLFM power amplifier module is Air-Cooled. The
module contains an optimized, highly efficient that ensures
an high cooling efficiency.
Supply voltage for the power transistors is adjusted as a
function of the output power and frequency significantly
improving efficiency.
Redundancy design and high quality components make
ETLFM amplifier module extremely rugged and reliable.
Metering and protection circuit is provided to monitor all the
amplifier parameter and manages potentially critical situation
as overtemperature, power failure, output reflection power
and many others.
Air-Cooled ETLFM Series
New Technologies and innovative equipment manufacturing
The new Air-Cooled EuroTel ETLFM transmitter generation features outstanding
technical parameters, an optimum cost/benefit ratio, plus maximum reliability and
ease of servicing. EuroTel ETLFM transmitters also feature high energy efficiency
and outstanding configuration flexibility.
The transmitter offers maximum on-air reliability and redundancy, and thanks to the
reduced number of subassembly and easy access to each module inside the
cabinets, offers simplicity in its operation and maintenance procedure.
New LDMOS device technology delivers a high increase in power density, ensuring
efficiency, compact design, high output power and lower operating costs that
makes EuroTel ETLFM transmitter ideal for all FM applications.
Exhaust fan
Supervisor and
switch-over logic
Exciter modules
Power Amplifiers
Mains isolation
transformers
Product details
High Power High Efficiency
The EuroTel ETLFM air-cooled series offers high power and
high efficiency due to design technology and power voltage
regulation circuit. This regulation mechanism in amplifier
modules yields a major increase in efficiency. The supply
voltage for the power transistors is adjusted as a function of
the output power and frequency significantly improving
efficiency.
Maximized Coverage with the ETL3100 Exciter
Utilizing the ETL3100 digital exciter, the benefits that
customers can realize are improved stereo signal-to-noise,
AM noise null, and the ability to synchronize to an external
reference for use in on-channel booster systems. The
ETL3100 exciter provides a flawless signal with complete
technical and regulatory compliance for solid-state
transmitters.
Both analog AF signals and digital signals in line with bitserial AES/EBU protocol can be processed. Left/Right,
MPX, RDS or SCA signals can be used as modulation
signals.
Monitoring, Web interface and remote control
Each power amplifier module has dedicated control and
monitoring to support on/off functionality warnings and
alarms for reflected power, temperature, power overdrive
and other measures.
The transmitter control unit handle both internal and external
communications and provides all control functions.
All transmitter, cooling system, exciters and amplifiers
parameters required for diagnostics can be retrieved locally
as well as remotely from anywhere in the world via a
standard (IP) protocol and standard software (web browser,
SNMP). This allows to accurately evaluate the transmitter
status of unattended stations.
GSM system
EuroTel ETLFM transmitters can be provided with internal
GSM monitoring and controlling system as requested
option. This feature allows the operator to monitor the
transmitter status via GSM command receiving SMS from
transmitter unit about status and eventually failure states.
Using GSM system, the operator can also send remote
control to the transmitter unit.
Enhanced Redundancy
The EuroTel transmitter supports a range of backup options
simplifying on-air servicing and eliminating costly
interruptions. In dual-drive systems, the integrated control
system monitors exciters and switches control of RF feed.
Conventional standby systems such as exciter standby,
(N+1) standby, passive standby can be implemented.
High redundant design in amplifier modules also makes the
EuroTel Air-Cooled series a very rugged, reliable transmitters
family.
Cooling system
The EuroTel ETLFM transmitters are air-cooled. Air cooling
system includes internal blowers, which pull cool air from
the front through a removable filter, and exhausts in the
rear. An exhaust air extractor is also present on the top of
the cabinet. Various air ducting configurations or external
system taking air from cleaning room is available as
option.
www.eurotel.it
Features
• High power and high efficiency due to modern design
technology
• Rugged, reliable and highly redundant design
• Final amplifiers voltage supply proportional to RF output
power
• Dedicated built-in power supply for each amplifier module
• ETL3100 EuroTel exciter digital based FM modulator
• Fully broadband power amplifier modules 87,5 –108 MHz
• Easy replacement of RF amplifier modules during
operation for simplified maintenance
• Internal GPS option for high frequency stability and
synchronous FM application
• Bidirectional interactive GSM monitoring and controlling
system (option)
• Built-in Radio Data System
• Built-in high quality digital stereo coder
• Modular central control system for straightforward
monitoring and in-depth diagnostics
• Web, SNMP remote control, and parallel commands
remote control interface
• Configurable in system N+1 controlled by ETL0800TA
Logic N+1 controller
Specifications
Specifications are subject to change without notice.
STEREO TRANSMISSION QUALITY
GENERAL
PRIMARY POWER
3-phase 50/60 Hz, 415/400/380/220V
single-phase 50/60 Hz,
240/230/208/127/115V
AC LINE VARIATION
MAX. INSTALLATION ALTITUDE
± 15%
OPERATING TEMPERATURE RANGE
PERMISSIBLE RELATIVE HUMIDITY
COOLING METHOD
2000 m above sea level (>2000 m on request)
-5 °C to +45 °C
95%, non-condensing
Forced Air
(Left / Right inputs, internal stereo coder function enabled)
DEVIATION
AMPLITUDE FREQUENCY RESPONSE
THD
± 75 kHz Nominal
< 0.4 dB, 20 Hz to 15 kHz
< 0.01%
THD+N
CROSSTALK (20HZ TO 15 KHZ)
S/N WEIGHTED
< 0.04%
> 65 dB
> 75 dB qpk
S/N UNWEIGHTED
> 85 dB rms, 80 dB qpk
(MPX Input, external stereo coder)
OUTPUT PARAMETERS
FM MODULATION MODES
OUTPUT FREQUENCY RANGE
TUNING RESOLUTION
OUTPUT IMPEDANCE
PERMISSIBLE VSWR
FREQUENCY DRIFT (PER YEAR)
FREQUENCY DRIFT (PER YEAR)
(WITH OPTIONAL GPS BOARD)
Stereo, Mono, MPX
87.5 to 108 MHz
1Hz
50 Ω, unbalanced
< 1.5
<1x10-6
<1x10-7
DEVIATION
AMPLITUDE FREQUENCY RESPONSE
THD
CROSSTALK (20HZ TO 15 KHZ)
CROSSTALK (40HZ TO 15KHZ)
S/N UNWEIGHTED
EXT. TIME AND REF. FREQUENCY
REFERENCE FREQUENCY
REFERENCE IMPEDANCE
REFERENCE CONNECTOR
TIME REF. INPUT FREQUENCY
10 MHz
50 Ω
BNC
1 PPS
INPUTS
ANALOG L/R INPUT
AES/EBU AUDIO INPUT
MPX INPUT
EXTERNAL 10 MHZ CLOCK INPUT
EXTERNAL 1 PPS CLOCK INPUT
XLR, 600 to 3kΩ balanced
BNC, 75 Ω
XLR 600 to 3kΩ balanced/unbalanced
BNC
BNC
< 0.05 dB, 40 Hz to 67 kHz
< 0.01%
THD+N
S/N WEIGHTED
± 75 kHz Nominal
< 0.04%
> 55 dB
> 45 dB
> 75 dB qpk
> 85 dB rms, 80 dB qpk
REMOTE CONTROL
SERIAL REMOTE
ETHERNET/SNMP
GSM MODEM (OPTIONAL)
RS232
RJ-45
Air-Cooled ETLFM Series
New Technologies and innovative equipment manufacturing
Air cooled block diagram
Amplifier
N.1
Air cooled drawer Amplifier 1
P.S. # 1
COMBINER
COMBINER
COMBINER
SPLITTER
S
P
L
I
T
T
E
R
P.S. # 4
SPLITTER
FM
Exciter 1
ETL3100
P.S. # 3
SPLITTER
DRIVE
L+R
MPX
AES/EBU
S
P
L
I
T
T
E
R
P.S. # 2
Drawer Amplifier 2
ETL0700TA
Transmitter supervisor
and switchover unit
C
O
M
B
I
N
E
R
C
O
M
B
I
N
E
R
Drawer Amplifier 3
Drawer Amplifier 4
RF OUTPUT
Directional
coupler
Drawer Amplifier 5
L+R
MPX
AES/EBU
FM
Exciter 2
ETL3100
S
P
L
I
T
T
E
R
Drawer Amplifier 6
Drawer Amplifier 7
C
O
M
B
I
N
E
R
Amplifier
N.2
Drawer Amplifier 8
FM Transmitters in N+1 Configuration
5KW FM Transmitter
10KW FM Transmitter
20KW FM Transmitter
comunicationlab_varese - 8240_Ed_09_2013
EuroTel Headquarters
in Lissone, Milan, Italy
Manufacturing plant
in Cuveglio, Varese, Italy
EuroTel S.p.A.
Viale Martiri della Libertà 4/4a - Ang. Via Beltrame, 1/3 - 20851 Lissone (MB) - Italy
Tel. +39 039 24361 - Fax +39 039 2436222 - www.eurotel.it - sales@eurotel.it