VHF/FM - Transmitter Brochure

A SECURE INVESTMENT INTO THE FUTURE
FM-TRANSMITTERS
THE MODULAR VHF/FM TRANSMITTER FAMILY
LOW-POWER
HIGH-POWER
transmitter series 327X
transmitter series 325X
327X
series
Output
power
Power
range
T 3270
100 W
5 – 100 W
T 3256
2,5 kW
T 3271
250 W
50 – 250 W
T 3255
5 kW
1000 – 5000 W
T 3272
500 W
100 – 500 W
T 3254
10 kW
2000 – 10000 W
T 3273
1000 W
200 – 1000 W
T 3258/20
20 kW
4000 – 20000 W
T 3274
1250 W
250 – 1250 W
T 3258/30
30 kW
6000 – 30000 W
Transposer versions
Passive exciter standby
Upgrade with additional
passive exciter chassis
328X
series
327X
series
Passive exciter
standby
Output
power
TP 3280
100 W
T 3272
Yes
TP 3281
250 W
T 3273
Yes
TP 3282
500 W
T 3274
Yes
TP 3283
1000 W
TP 3284
1250 W
325X
series
Output
power
Transposer extension
Replacement of
the T 3270 exciter
with a TP 3280 transposer
Power
range
500 – 2500 W
Passive exciter standby
Upgrade with additional
second exciter T 3270
or transposer TP 3280
Passive transmitter standby, active transmitter reserve, (n+1) transmitter-standby (central-control unit CCU 7455/7456)
T
RANSRADIO VHF/FM transmitters cover the entire power
range from 5 W to 30 kW.
The different power classes comprise common standard modules,
which provide easy replacement, cost-efficient upgrade and
low cost of maintenance. All units fit into 19” racks. While single
low-power transmitter can be supplied in table racks, systems
of low-power transmitters as well as the high-power transmitters
are integrated in 2m racks. The flexible cooling system of the
TRANSRADIO transmitters allows individual adaptation to site
specific conditions, e. g. inlet cooling air taken from the outside
and warmed outlet air expelled into the building, external and
internal ventilators and ducted air systems.
TRANSRADIO delivers custom-tailored solutions for the needs
of their customers. The professional service of TRANSRADIO
ranges between the delivery of the transmitter and the
management of turnkey projects including all facilities to
operate a broadcasting station.
THE VHF/FM
TRANSMITTER FAMILY
Highlights
Block Diagram of a TRANSRADIO VHF/FM Transmitter T325X
❙ Proven MOS technology –
long-term reliability
and low-power loss
❙ Interfaces for remote control
(SNMP, HTML, Bitbus, RS 232C,
Parallel)
❙ Integrated deviation limiter
❙ All standby concepts can
be realized
❙ Compact design
❙ Site specific air-cooling
❙ Multilingual displays
❙ Direct modulated synthesizer
❙ Frequency adjustable
in steps of 10 kHz
❙ Integrated stereo encoder
❙ Easy maintenance as a result
of modular design
❙ 100% burn-in test
❙ After sales service of 20 years
Reliability
Built-in
Redundancy/Standby Systems (options)
❙ Power amplifier modules are
hot-pluggable, while the transmitter
remains on air (in case the number
of amplifier 2 )
All standby concepts can be realized.
❙ Excellent long-term reliability due
to low junction temperature (less than
90°C at 25°C air-temperature)
❙ Protection against over-temperature,
VSWR deviations, over-voltage and
over-current
❙ Fully automatic unmanned operation
even under extreme environmental
conditions. Continuity in full power
operation up to VSWR of 1:1.5. Above
this threshold, service continues
at reduced power
❙ Passive exciter standby
❙ Passive transmitter standby
❙ Active transmitter reserve
❙ (n+1) transmitter standby
Service-friendly Design
The modular concept of the family
of VHF/FM transmitters provides easy
replacement of all components.
T 3274
1250 W
LOW-POWER TRANSMITTERS T 327X
T 3273
1000 W
T 3272
500 W
Components in modular design
T 3271
250 W
T 3270
100 W
Low Power Systems T327X
❙ Apart from the transmitter T3270
with a 100W amplifier module, all
transmitters of the T327X family
employ 250W amplifier modules.
Furthermore, every amplifier module
has its own harmonic filter and
pre-amplifier.
❙ The integrated harmonic filter
attenuates the harmonics at the point
of origin. Consequently, the T327X
transmitter family exhibits a minimum
of power loss, EMV-radiation and
a maximum of signal quality.
❙ Due to the integrated pre-amplifier,
an extremely low input level of only
14 dBm (25mW) is required.
Integrating a pre-amplifier in every
amplifier module provides additional
redundancy.
T 3258/30
HIGH-POWER TRANSMITTERS T 325X
T 3258/20
30 kW
20 kW
T 3254
10 kW
T 3255
5 kW
T 3256
2,5 kW
High Power Systems T325X
❙ The T325X transmitter family employs
2.5 kW amplifier modules. Every
amplifier has its own power supply.
The power supply and the amplifier
modules are hot-pluggable.
❙ The transmitter T325X can be
delivered with an exciter T3270 or
a transposer TP 3280. Choosing a
transposer TP 3280 converts the transmitter into a high power transposer.
❙ In addition, a Double Transmitter Rack
Option and Mobile Container Option
are available.
❙ The Double Transmitter Rack Option
gives the ability to integrate two transmitters (T 3256 or T 3255) into one 19”
rack to minimise space requirements.
❙ A rack with a lower height is available
in order to integrate a transmitter
T325X into a mobile container.
TRANSPOSERS TP 328X
Transposer TP 3280
Haute Nandaz Switzerland
Transposer on top of a mountain
(
)
(
Block Diagram of the Transposer TP 3280
RF, receive frequency
RF, transmit frequency
Receiving section
Double SuperHeterdyne
Receiver
The VHF/FM transposers distribute
programmes to local areas or areas
which are difficult to access, for
instance, in valleys or behind mountains, without high investment in fixed
line connections for programme
delivery.
The exciter T 3270 is easily exchangeable with a transposer TP 3280 thus
converting every high-power transmitter
into a high-power transposer. A transposer version TP 328X is available based
on the low-power transmitter. Therefore
transposer from TRANSRADIO cover
the power range from 5W to 30KW.
Transmitting section
Baseband
treatment
and filtering
BasebandSignal
(Mono or
Composite /
Multiplex)
Synthesizer
87.5 to
108 MHz
100 W
Power
Amplifier
TP3280
The received signal of the transposer
is demodulated down to an MPX signal.
In the transmitter section this MPX signal modulates the new transmission
frequency.
ACTIVE
TRANSMITTER-RESERVE
REMOTE CONTROL
AND ERROR TRACKING
VIA SNMP AND HTML
Client with
standardwebbrowser
VHF/FMtransmitter
SMS-messages
Ethernet
10 kW Active TransmitterReserve System
ISDN/
PSTN
router
Block Diagram 10 kW active Transmitter-Reserve
Control Unit
(CCU7456)
Load
Balancing
Resistor
5KW Transmitter A1
( T3255 )
Ethernet
interface
card
3dB - Combiner
RF
10W
Mailserver
RF
5KW
Exciter A1 ( T3270 )
Antenna
RF
20W
AF
AF-Splitting
Amplifier
Dummy
Load
(Exciter)
RFSwitch
Panel 1
NTP-server for
time-synchronisation
RFSwitch
Panel 2
Power
Splitter
SNMPmanagement
system
RF
10KW
Dummy
Load
1:2
Exciter A2 ( T3270 )
RF
10W
Passive
Exciter
Standby
TRANSRADIO SenderSysteme Berlin plc
introduced a new VHF/FM active transmitter reserve system to the market in
2005. It successfully passed the acceptance test of T-Systems in Germany in
October 2005.
The active transmitter reserve system
combines high redundancy with costefficiency as the complete system
comprises only two 19 inch racks.
RF
5KW
Active
5KW Transmitter A2 Transmitter
( T3255 )
Reserve
The active transmitter reserve system is
available in 10 and 20 kW versions.
The new system consists of two independent transmitters with separate
power supplies and exciters. Consequently, for maximum redundancy, both
exciters are employed in a passive
standby configuration.
The transmitters can be switched either
individually or as a combined system to
the antenna or dummy load. Motordriven RF coaxial switches enable fully
automatic transmitter operation.
Optional manual switches with shorting
plugs are available.
A central control unit CCU7456 provides
all functions to monitor and to control the
operation of the reserve system. A block
schematic of the RF path is displayed on
the screen of the central control unit.
Web-interface for Remote Access
This function gives broadcast operators
the ability to control their equipment
from any place in the world.
Each transmitter is optionally accessible
via HTML and SNMP. The network
access can be via dial-in (PSTN, ISDN)
or Ethernet connection (TCP/IP).
The remote services are integrated
in the TCP/IP interface-card.
The web server and the SNMP based on
SNMP MIBs (management information
base) offer all necessary functions to
remotely control the transmitter and
to display status messages.
SPECIFICATIONS
Transposer-Receiver Specifications
Frequency range
Number of presets (remotely selectable frequency settings)
Center frequency drift
Intermediate frequencies
Antenna input connector
87.5 ... 108 MHz,
adjustable in 1 kHz steps
6
< ± 300 Hz (3 months)
10.7 MHz and 700kHz
BNC 50 ⍀
Selectivity, immunity towards one disturbing interferer
(max. permissible level of one modulated offset interferer,
in order to maintain a weighted S/N-ratio of 54dB,
for a 1mVeff = 43 dB(pW) input signal level)
± 6 kHz offset
± 100 kHz offset
± 200 kHz offset
± 300 kHz offset
> – 60 dBc
> – 60 dBc
>
0 dBc
> + 25 dBc
(stereo)
(stereo)
(stereo)
(stereo)
Large-signal performance, immunity towards
two disturbing interferers
(max. permissible level of two interferers, symmetrically offset
by 1.5 MHz, one of them modulated, in order to maintain a weighted
S/N-ratio of 54 dB, for a 1mVeff = 43 dB(pW) input signal level)
> + 30 dBc (stereo)
Unweighted signal-to-noise ratio, for input level:
1mVeff = 43 dB(pW)
10mVeff = 63 dB(pW)
> 67 dB (stereo)
> 70 dB (stereo)
Weighted signal-to-noise ratio, for input level:
1mVeff = 43 dB(pW)
10mVeff = 63 dB(pW)
> 63 dB (stereo)
> 65 dB (stereo)
Linear distortion (MPX)
40 Hz – 43 kHz
43 kHz – 65 kHz
65 kHz – 76 kHz
± 0.1 dB
± 0.3 dB
± 0.4 dB
Non-linear distortion
40 Hz – 5 kHz
5 kHz – 15 kHz
< – 49 dB (stereo)
< – 43 dB (stereo)
The transmitting section of the transposer TP 328X is based on the transmitter
family 327X. As a result the specifications of the transmitter family also apply to
the transmitter part of the transposer.
VHF/FM Transmitter Specifications
TYPE
Output power range
Power supply
Number of amplifiers
RF-connector
Family specification
Power reduction at
Suppression of RF harmonics
Suppression of reverse intermodulation
Noise power relative to carrier (>2MHz offset)
Frequency range
Frequency stability within 3 month
Modulation system
Operation modes
AF-input impedance frequency
Input level for 40kHz deviation
Frequency deviation sensibility stability
AF amplitude response between 40Hz and
100kHz at 40kHz frequency deviation
Signal-to-noise ratio
AF harmonic distortion (THD)
Stereo crosstalk attenuation
Cooling system
Operation after mains failure, recovery time
Temperature range
rel. humidity
Remote control
Number of presets
VHF/FM LOW-POWER TRANSMITTER FAMILY
VHF/FM HIGH-POWER TRANSMITTER FAMILY
T 3270
T 3271
T 3272
T 3273
T 3274
T 3256
T 3255
T 3254
T 3258/20
T 3258/30
5 – 100W
50 – 250W 100 – 500W 200 – 1000W 250 – 1250W 500 – 2500W
1 – 5kW
2 – 10kW
4 – 20kW
6 – 30kW
1/N/PE/115/230 V AC ±15%
3/N/PE 400V AC ±10%
1
1
2
4
5
1
2
4
8
12
N
7/16”
1 5/8”
3 1/8”
VSWR > 1.5
> 85dB
> 15dB
<- 150dB/Hz
87.5MHz to 108MHz in 10KHz steps
< 300Hz
F3E
mono, stereo, MPX, (L+R)/2, SCA, RDS
> 2.000 Ohm or 600 Ohm
–5.25dBm to +12.5dBm in 0.25 dB steps
better than ±1%
< 0.1dB
> 70dB at fmod = 500Hz and 40kHz frequency deviation (CCIR weighted)
< 0.1dB between 40Hz and 100kHz at 40kHz deviation
> 55dB between 40Hz and 15kHz
forced air (internal or external blower)
< 2sec.
–10°C to +45°C
95%
RS232 standard, Bitbus, SNMP, HTTP or parallel interface optional
6
Data not binding for delivery
TRANSRADIO
SenderSysteme Berlin AG
Mertensstraße 63
13587 Berlin
Germany
tel.:
fax:
e-mail:
internet:
+49-30-3 39 78-0
+49-30-3 39 78-599
[email protected]
www.tsb-ag.com
design: HUSS-MEDIEN GmbH
photos: Transradio SenderSysteme AG, Wolfgang Korall