FM Transmitters

FM Transmitters Family Names of the WIRED Line

  • SYNAPSE: Low Power FM Transmitter and Commercial FM Transmitter

  • AXON: High End Compact Low Power and Medium Power FM Transmitter

  • NEURAL: DDS Direct Digital synthesis Compact Low Power and Medium Power FM Transmitter

  • CORTEX: High Power Modular Architecture FM Transmitters

  • CELL: FM Amplifier module & RF Pulse Amplifier

  • GYRUS: High Power Modular Combined Architecture FM and RF Amplifiers

To better understand how the wide range of products are organized in our catalogue we can divide them by power levels and by architecture as follows

FM Transmitters Family Names by Power Level

The FM Products and Radio Station Equipment Portfolio are divided in the follows categories by power level:

  • Low Power FM Transmitters: SYNAPSE, AXON and NEURAL Series

  • High Power FM Transmitters: CORTEX Series

FM Transmitters Family Names by Architecture

The name of the products categorized but their architecture are:

  • Compact Architecture: SYNAPSE, AXON and NEURAL Series

  • Modular Combined: CORTEX Series

  • SYNAPSE: Low Power FM Transmitter and Commercial FM Transmitter

  • AXON: High End Compact Low Power and Medium Power FM Transmitter

Features constructive

criteria General of project is construction

There design is there construction from apparatuses is performed to rule art second the current regulations European is, in general, comply to the progress technical is technological for Systems Engineering, materials is components used.

The use of components active is passive, of manufacture is supply current, is rigorously compliant to specific provided come on their builders.

So far as are used transistors, circuits integrated, or anyway components of any guy that for the their guy of operation requiring of to be selected to pairs or to groups is indicated explicitly such need and it is guaranteed that these pairs or groups arenormally available on the market.

IS' declared there temperature of junction of semiconductors of amplification RF, measured with temperature air environment external equal to 45 ° C and to power par. this temperature not needs to overcome 80% of the value maximum declared by us .

It is furnished documentation inherent the test executed, in phase of approval internal, on semiconductors of amplification RF.

The apparatuses provide stadiums of amplification in full the state solid with cooling to air.

THE combiners RF interior to forms amplifiers not they are cooled from fans dedicated; is admitted the cooling down forced self the combiner is positioned in way from to be cold from the flow of air that passes through the whole amplifier. In every case the cooling down is entrusted to the transit of air on a sink. any transit of air forced not interested directly the RF section.

Not I'm present circulatory RF.

All the features radio, mechanical is functional Yes refer to cars belonging to any class of power is on any frequency of operation.

The interval of time average (MTBF), expected between two interruptions of operation row of the transmitter is between two failures consecutive, is greater or equal to 3 years.

In this headquarters, such as break of operation Yes It intends power RF of transmission lower of a threshold settable respect to the value nominal (with signals of entrance present is state of transmission enabled) and / or features of the signal in Exit differing from one in entrance to the transmitter. The criterion of decision Sara explicate in following. Such as breakdown It is intended the operation to the of out of the specific technical of specification (with signals of entrance present is state of transmission enabled). The interruption of service can he to be then caused from a only failure serious or from a set of Troubleshooting minor that Yes occur at the same time.

Ai ends of the determination of the MTBF, we can do reference to regulations inherent to evidence accelerated of life, to evidence weather is of quality on components used, a operating data of transmitters similar already in service etc.

The supply of the devices can be stand-alone or in the closet.

To exclusion of filters RF of reception and / or transmission, in any configuration of exercise the apparatuses work up all there band of frequency 87.5 - 108MHz without replacement or tuning of any component.

The single amplifier it works on all there band of membership (87.5 - 108MHz) without any regulation or intervention, to the end of can use the same module on installations with frequencies of operation different.

To the moment order, the components critics used Which devices RF, oscillators, display, FPGA etc. are in course of production.

The access from apparatuses is guaranteed accessing to equipment and to all the elements that the make up exclusively from the side front is rear closet. any tools needed for the drive of systems of restraint (screwdrivers, keys to Allen etc.) are provided and housed in proximity of the system.

The system of measure of the power RF (direct is Reflected), is of guy "Offset" in way from to guarantee, independent from frequency of operation of the transmitter is without need of adjustments manuals, values within ± 0.5dB throughout operating band.

On the coupler directional of Exit RF dedicated to measures through instrumentation outside, it is affixed the value of coupling for there specific frequency of operation. Integrated in monographs of the system, is reported there curve of coupling for all there band of operation 87.5 - 108MHz.

Type of operation

The apparatuses I'm designed is constructed for a operation in stations not policed.

In the apparatus pilot is the amplifier the final of power, to ends of the operation remote-controlled or automated, I'm available the information logics related the state of operation of the equipment themselves.

In particular, for how much it concerns the amplifier of power, the functions needed for the regular operation of the same I'm implemented from a system indoor of automatism is control that Report all the causes that can to determine the operation anomalous and / or the mass out service apparatus.

The transmitter is full of any organ necessary to the his operation.

The main adjustments operating for there mass to point apparatus I'm yields possible operating on the front of the same.

All the commands is the adjustments reported both on the panel front that inside of of the single unit modular, I'm armed of directions atte to identify the functions.

The identification of the single set off apparatus is possible to half of acronyms or numbers. For to ease there location of components of the single unit modular, is expected also the use of schemes Topographic.

C on the term Transmitter Yes It intends always all of following three functional blocks: Pilot, Amplifier the final RF is System of Management.

THE blocks functional modulator MF, amplifier the final RF is system of management, it is possible to supply them such as apparatuses separated. T ale solution, it is identified with there wording "Transmitter in version standard".

THE blocks functional modulator MF, amplifier the final RF is system of management, it is possible to supply them such as single apparatus inside of of single structure mechanics. T ale configuration it is identified with there wording "Transmitter in version compact ".

IS' possible also the only one integration of the system of management apparatus in the MF pilot

In case of transmitters in version standard, at the entrance RF amplifier the final is indicated clearly the level of pilotage for get there power nominal value of exercise in transmission.

The impedance of entrance is Exit RF of single forms I'm normalized to the value of 50 ohm.

The apparatus pilot is featured from performance of agility and the exchange of the frequency of operation, is implemented through there one setting of the modulator.

The transmitter is gifted of one tool indicator of the power live is of the power reflected. IS' possible the indication with instruments to needle or digital with value in W. In case of instruments to needle a power rated, there deflection indicator is including between the 50% is 80% of the background ladder.

For all the classes of power is through timely procedure, is possible make a declassifying of the power RF of transmission from -1 to 6dB reported a class of nominal power of the apparatus.

The cooling down of every single transmitter is to air, levied in environment and opportunely filtered. The air exhausted, it is expelled in environment is self explicitly required, ducted to the outside.

Protections apparatus

The apparatuses issuitable to the operation continued with or without signals at the entrance of any kind, without suffering damage.

All the protections I'm present both to level of system both to level of single module functional (pilot, amplifier etc.).

A possible break issuance RF, generated intervention of a circuit of protection of apparatus and / or of system, preve de the relative command, local is remote, of reset .

The apparatus is safe versus the damage that they might to derive inefficiency of the system of cooling down. L e protections adopted are declared in offer phase.

TO warranty of a adequate sizing of the system of dissipation of the temperatures on the transmitter working from at least 4 hours to power nominal is with a temperature environment of about 20 ° C, is possible inhibit the electric fans of cooling down of the module amplifier the final RF is of concerning power supplies; in these conditions, is guaranteed there continuity of operation of the transmitter, to nominal power is without Troubleshooting irreversible, for at least 180 seconds before intervention of the protections thermal (positioned on the heat sink RF is on feeders).

The Times are more long by 180 seconds a noteworthy feature .

During such interval of time, the heat sink of the module amplifier RF presents a increase thermal maximum average of 5 ºC / minute.

The amplifier the final of the transmitter in version standard (pilot + amplifier the final of power separated), in conditions of operation to power rated, runs without Troubleshooting irreversible variations sudden of the signal RF to the own entrance (absences,restoration and / or variations Snapshots).

The exit apparatus is protected versus any overload is mismatching. In particular the transistors amplifier the final not must suffer damage when the ROS of Exit exceeds the values allowed including the conditions of short circuit or circuit open.

Every single amplifier It has of protections autonomous for over - piloting, overcurrent, temperature is ROS. These protections I'm independent from those the entire transmitter. It is Moreover slaved to the circuit of interlock , opening of the which is interrupted immediately the issue RF.

in amplifiers final of power, consist from more forms connected in parallel, I'm provided opportune protections is related reports locals is remote for the failures partial amplifier RF the final such as: failure of a single module, high power dispelled over loads of displacement etc.

I'm provided opportune protections, realized with adequate switches, versus overloads e short circuits.

I'm provided protections for reduce to the minimum the damage deriving from inefficiency of one or more components of the transmitter or from maneuvers wrong.

The time of intervention of circuits of protection is there maxim current circulating during this time, I'm these from respect the limits imposed from the Supplier of the particular component on the which acts there protection.

The sizing of components, there their layout and the wiring apparatus, I'm these from to prevent damage due to Surge resulting to static weather. Such as examples Yes can quote:

wiring energy primary separate from other connections in way from to avoid the transfer for coupling of any Surge present on network

shielding of circuits particularly sensitive in way from to avoid pairings inductive or capacitive with set off that can to be concerned by Surge

filtering of supply voltages in entrance to circuits particularly delicates

The effectiveness of measures adopted it is verified through a test with pulses of the guy 1.2 / 50μS is with value of crest of 4kV (mode prescribed in publication CEI EN 61000-4-5 published October 2007 - classification CEI 110- 30 - dossier 9084 is later updates). Ai ends of the rating of this clause is produced , in seat of offer technique, there relative certification from part of a Third party notified.

IS' possible there presence of transformers insulation is supply, with screen electrostatic to mass, integrated into apparatuses or in drawer of distribution energia.I materials insulating, employees in transformers, I'm impregnated with paints these from make them non-flammable.

THE conductors of the wiring I'm constructed with material nonflammable; in particular the coating external responds a norm CEI 20-22 or:

not generate flame both for overheating that for exposure to flame

not propagate by its nature the process of combustion

the process of combustion both self-extinguishing to the to cease of the cause that the has caused.

THE cables I'm at least class of operation 85 ° C.

The load of system, self included in supply, is adequately oversized in way that can dissipate there power apparatus to it connected for a time indefinite.

Features mechanical " equipment "

The features mechanical from apparatuses expected in supply (pilot, amplifier, logic of commutation etc.) I'm suitable for mounting on wardrobe and / or rack guy frame of the dimensions of 19 " standard is fixing to concerning posts through screws from 6BUT.

Also if the realization of the mechanical structures of the apparatuses were suitable for the mounting to "Overhang" from themselves, such as accessory it is expected there supply of guides of support such as help for the mounting from themselves in wardrobes is frames customer standard .

There depth from apparatuses not exceeds the 500 mm is there projection on the front, including the handles, needs to It's contained within the 100 mm.

So far as the pilot come provided separately amplifier RF, not has height higher to 3 standard units.

It is a noteworthy feature self, the transmitters (version standard or compact) of all classes of power, have each a weight less than 25Kg.

Supply from network

The comply all the features radio of emission is the functionality specified in Specifications, when I'm fed from a network single phase having the following features:

  • Voltage 230 V ± 15%
  • Frequency 50 Hz ± 2%
  • Number phases single phase
  • Distortion of the form wave ≤ 10%

At the entrance of each of the individual supply lines equipment, it is added a having switch there function of switch

On the panel rear from apparatuses, is here I'm a terminal of section appropriate a power in game for the frank mass to land of the container.

each apparatus is accompanied of cables electrical steering wheels for power from network.

on all the lines of supply in Exit to the apparatuses (direct is commuted) appropriate switches thermal for the sectioning is there protection of all the equipment and elements active constituents the facility;

special connectors and / or terminal for the wiring with the various utilities;

Power absorbed

In the attachment 1 CG_Features General is layout installations, the values are indicated of the absorbed power from the network of power supply in ca

There current maximum, during the events transients, does not exceed 10 times there current nominal of work with the apparatus adjusted to full power. For current nominal of work Yes It intends there current absorbed from the system in conditions of operation and power of exercise.

For apparatuses of class of power RF ≤ 250W the factor of power, in all the conditions of operation apparatus provided from the specifications, is greater or equal to 0.80 to nominal power.

For apparatuses of class of power RF ≥ 500W the factor of power, in all the conditions of operation apparatus provided from the specifications, is greater or equal to 0.90 to nominal power.

THE returns minimum for the single transmitters (pilot + RF amplifier + management system) I'm:

yield minimum Transmitter 100W: ≥ 60 %

yield minimum Transmitter 250W: ≥ 70 %

yield minimum Transmitter 1000W: ≥ 75 %

So far as the apparatus should work to power reduced till to -3dB, the deterioration of the yield is content within the 5% respect to the value reported to the operation at nominal power.

So far as the apparatus should work to power reduced till to -6 dB, the deterioration of the yield is content within the 10% respect to the value reported to the operation at nominal power.

System of cooling down

The system of cooling down plant transmitter is to air forced through fans fed in cc, of long duration, high efficiency is low noisiness

In point of withdrawal air for there ventilation, there is added a effective filter, enough dimensioned is realized through elements filtering to dry easily replaceable.

The elements filtering I'm self-extinguishing. They are supplied by us the features (efficiency, lost of load, capacity of restraint powders, etc.).

There difference between the temperature of entrance e of Exit apparatus is lower or equal to 15 ° C.

To the end of to prevent process corrosive on cards is components, invested or lapped from the flow of air of the system of cooling down that could cause deposits of humidity, powder or substances corrosive, are adopted the needed precautions estimates Which mechanical protections or treatments of tropicalization. To ours load any interventions, later installation, in sites with details issues environmental. The process of tropicalization expected is the one defined from IEC60721-3-3 standard class 3C2.

Retention of the features to the to vary of the conditions environmental

All the features radio of emission is the functionality specified in Specifications I'm maintained, for a whatever quote of installation till to 2500 m slm is for a degree of humidity relative till to the 90%, without interventions of the personnel.

The apparatus It keeps the features of emission requests for variations of temperature environment within the limits of -5 ° C + 45 ° C.

The apparatus not suffers damage or breakdowns, to character irreversible, when stored or done work in environments with temperatures including between -20 ° C

+ 60 ° C.

Resistance to shock and to vibration

The apparatus is suitable to the transport on roads rough without to lose there own functionality or mass to point.

microphonics

The apparatus, with particular reference to oscillators locals, it is free from microphonic. If yes ottoposto to noise acoustic product from a source mail a distance of 1m, with frequencies variables from 10Hz to 10kHz is with a level sonorous of 76dB (A), notoccurs worsening of the relationship signal disorder exit, such as indicated in paragraphs later.

Transmitter - specific technical General

Bands of frequency is exchange of channel

The transmitter works for every frequency of the band VHF in range 87.5MHz ÷ 108MHz.

The transmitter it is provided or on particular frequency indicated by the Principal at the time of the order or is can run the procedure of exchange rate using only the predisposition of the modulator.

Power of Exit

There stability of the power of Exit is maintained within ± 0.5dB respect to the level of nominal power.

The system of monitoring of the level of the power RF of Exit, It allows the setting of thresholds of measure is of alarm in basis a power of exercise set. TO title of example, a transmitter adjusted at first with level to 0dBr is threshold alarm power to -3dBr,subsequently to a possible lowering of the level of Exit to -1dBr, there new threshold needs to to be to -4dBr maintaining then the alarm to –3dB from transmitted level.

Connectors is Impedance from stadiums to radio frequency

The impedance feature of entrance is of Exit from stadiums to radio frequency is of the related lines of connection is normalized a 50 ohm unbalanced.

THE connectors of entrance is of Exit, dimensioned for there power in transit, I'm of the guy to connector or flange EIA / 50 ohm. I'm normalized the following types: N, 7/16 " 7/8 ".

Time of going to regime

In case of break power from network of duration indefinite, the transmitter it works to regime in full power within 60 seconds from the restoration energy electricity.

It is a noteworthy feature the achievement of the conditions of operation regulations in times lower than from restoration power.

Behavior working of the ROS of the load of exit

The transmitter can he work with values of Lost of return ≥ 15dB of the termination of Exit. Within such limit, the features of emission I'm e comply to how much required in present Specifications.

For values of Lost of return included between <15dB is ≥ 10dB, the transmitter can continue to work but to this end is allowed there reduction automatic is proportional of the power of Exit (protection ROS of guy linear). In such condition the features ofissue, to exception of the level of power RF of Exit, are comply to how much required in present specification.

For values of Lost of return <10dB, the transmitter it goes in stand-by is, over maximum time of 30sec, try to restart for three times. in conditions of stay of ROS high , will arise in stand-by permanent. The cycle of try again for there verification of the ROS you can remove it both from local both from remote. The counter of the retries ROS it is automatically reset every Now.

in systems from 250W is 1000W, with values of lost of return worse of 10dB of the load in Exit, is considered a noteworthy feature that the transmitter continues to work reducing automatically is proportionally there power of Exit (protection ROS of guy linear). In case of deterioration momentary of the ROS, the transmitter restores automatically the nominal operating conditions.

Transmitter - specific technical of operation

Premise

The transmitter ax signals is it works in ways specified in regulations recalled in chapter 1.2.

For the measures it is used a demodulator MF, with answer in frequency uniform up to 100 kHz, of which i am known distortions own.

For the measures related to features specific of the operation stereo it is used the codifier of apparatus and a decoder of measure of which I'm note their distortions.

The measures of parameters low frequency of the operation monaural are carried out with preenphasys in transmitter is deemphasis in demodulator including. Those of parameters low frequency in operation stereo is channels auxiliaries in subcarrier , arecarried out with preenphasys in encoders is deemphasis on decoders including. In conditions of normal exercise the circuits of preenphasys 50μs I'm inserted.

All the values minimum required I'm independent from frequency is from apparatus operating power .

Capacity of modulation and features input

The modulator is realized with technology digital to synthesis live accompanied of codifier stereo is codifier RDS dynamic within content.

There deviation nominal of frequency has the value of ± 75kHz. IS' possible over driving the transmitter till to get a deviation of at least ± 100kHz.

IS' available a entrance for signal multiplex stereo and any channels auxiliaries in subcarrier , with band from 40Hz to 100kHz, with a impedance greater or equal to 2000 ohm. The level of entrance is adjustable, to steps from 0.1dB, between 0dBu is + 12dBu for get a deviation of frequency of ± 75kHz. IS' granted that the here I'm entrance both balanced or unbalanced. The value nominal of exercise is + 6dBu.

In reference to the point previous one needs to to be possible to execute there regulation of the sensibility input, locally through commands front is from remote through web interface.

IS' available a entrance for signal monophonic, with band from 40Hz to 15kHz, impedance greater or equal to 2000 ohm and having inserted one network of preenphasys with constant of time of 50 μ s. There preenphasys is excludable locally or from remote through interface web. The level of entrance it is adjustable to steps from 0.1dB between 0dBu is + 12dBu, for get a deviation of frequency of ± 75kHz. On this entry is also inserted a low pass filter such from to insure one attenuation of at least 30dB a 19kHz e till to 100kHz. IS' possible that the here I'm entrance can coincide with one of two inputs of signals left is right required in points later. In such case will to hire the following States of operation: left or mono / left , right or mono / right. IS' possbile that entry for signal monaural both balanced or unbalanced. The level nominal of the signal in exercise is equivalent to + 6dBu for produce one deviation of 75 KHz .

In reference to the point previous one, is possible to execute there regulation of the sensibility input, locally through commands front is from remote through web interface.

IS' available a entrance for channels auxiliaries in subcarrier , with band from 21kHz to 100kHz, unbalanced with a impedance greater or equal to 2000 ohm. The level of entrance is adjustable, to steps from 0.1dB, between -12dBu is 3dBu for get one frequency deviation of ± 10 kHz.

In reference to the point previous one is possible to execute there regulation of the sensibility input locally, through commands front, is from remote through web interface.

The inputs of signals left is right Yes refer to the codifier stereo MF that it is integrated in modulator. These inputs I'm balanced with connectors guy XLR female, have a impedance greater or equal to 2000 ohm and a band passing from 40Hz to 15kHz. IS 'possible to insert or switch off a network of preenphasys with constant of time of 50μs through command front or from remote through interface web. The level of entrance is adjustable to steps from 0.1dB between 0dBu is + 12dBu, for get a detour of frequency of ± 75kHz. Every single entrance expected a system of limitation ( clipper) that avoids over modulation in case of over elongations ( overshoot ) of signals of entrance. this circuit expected the two following modality of operation: " Normal " is "Hard". The two modality of operation they differ between their for the times of intervention of the circuit of limitation. In modality " Normal ", the times of intervention I'm more slow giving priority in presence of phenomena of overshoot , there quality of the signal audio of entrance. In modality "Hard" the times of intervention I'm more rapid penalizing, in presence of phenomena overshoot , there quality of the signal audio with a result is sudden increase of the distortion of the signal audio of entrance. There management whole wheat of the functionality of present inputs is possible through commands front or from remote through interface web. The value nominal of exercise is + 6dBu.

Entrance digital AES3 / EBU impedance 110 ohm balanced connector XLR female. There sensibility of entrance It allows there management of signals from 0.0dBFs to -24dBFS with regulation in 0.1dB steps.

In reference to inputs of which over it (MPX, L / R is AES3 / EBU) locally through commands front is from remote through interface web, I'm available the commands is the predispositions for allow there management of the inputs:

modality MANUAL for to select manually entry helpful;

modality AUTOMATIC for handle automatically the exchange from inputs (L / R - MPX - AES3 / EBU) preparing there Preferentiality is there modality of return input chosen such as preferential after a commutation input set to such as reserve.

There commutation automatic from inputs happens for absence signal modulating defined PREFERENTIAL with criteria described in points later.

For activation of the cycle of commutation is of the relative alarm of absence signal modulating, is possible setting up a level of threshold from -20 to -50dB, to steps of 1dB, reported a relative sensibility input set. The level of threshold typical is

-45dB.

For activation of the cycle of commutation is of the relative alarm of absence signal modulating, it is possible setting up a time of delay from 10 to 120sec to steps of 1sec. The value nominal of exercise is 60sec.

TO following of a commutation automatic, the return on line preferential is subordinate a presence constant of the line preferential for a time, settable by interface graphics to steps of a second, from 0 to 5min.

THE signals present on inputs not used not are disturbing to the signal of the active input; the decoupling between the inputs is of at least 70dB.

For every entrance, of which to points over it described, is expected a alarm of absence signal Modulating. this alarm generates relative reporting local, remote and d is verifiable also on web interface.

For each single entry, referred to in points described above, is can activate or to exclude the alarm of absence signal modulating through commands front is, from remote, through interface web.

The modulator allows the Mono operation - RDS.

The modulator It allows the setting of the deviation maxim of peak. this regulation It allows of to select values from 50 to 100KHz to steps of 1 KHz. There deviation maxim set is bound to settings of following values: sensibility of entrance, level of the subcarrier 19KHz is level under load-bearing RDS 57KHz.

The modulator worn the transmission in BII 87.5-108MHz. IS' can set the frequency of transmission to steps away from 25KHz.

There frequency of transmission set is verifiable on interface web is from front panel.

The modulator It allows of setting up a delay static between the signals of entrance is those of Exit from 0 to 900,00μsec. this delay is settable to steps of 0,1μsec.

The modulator digital, in her entirety, is manageable Street Ethernet. There management therefore includes all the functionality of the codifier stereo is of the codifier RDS.

The modulator digital expected there possibility of export, Street Ethernet, a file of configuration. The file of configuration It contains all the functionality audio, RF and RDS set.

Reference of frequency

The entrance of reference of frequency external presents the following features:

  • Connector BNC;
  • form wave sinusoidal;
  • frequency 10 MHz ;
  • level approved 0.5-2V;
  • impedance 50  ;
  • return loss best of 28dB.

Reference of time

The entrance of reference of time external has the following features:

  • Connector BNC;
  • form wave rectangular;
  • frequency 1 pps;
  • level approved TTL;
  • amplitude pulse 100us  10µs;
  • triggers on the front of climb;
  • impedance 50  ;
  • return loss best of 28dB.

Stability of frequency of the load-bearing

The greater deviation of frequency of the load-bearing from the value nominal in absence of modulation not exceeds ± 10 Hz in the absence of reference external 10MHz.

The greater deviation of frequency of the load-bearing from the value nominal in absence of modulation not exceeds ± 1Hz in presence of reference external 10MHz.

In agreement with the previous points, the tolerances these I'm respected within 5 minutes from power of the transmitter.

In absence of the reference external 10MHz the modulator passes automatically on the reference indoor.

Deviation of the frequency central of the load-bearing under modulation

For a deviation of frequency of ± 75kHz, the deviation of the frequency central of the load-bearing not exceeds ± 20Hz in absence of reference external 10MHz.

For a deviation of frequency of ± 75kHz, the deviation of the frequency central of the load-bearing not exceeds ± 1Hz in presence of reference external 10MHz.

Irradiation frequencies spurious

THE products harmonic measured exit RF of the transmitter do not exceed - 60dB respect a power nominal of Exit of the carrier. In no case is exceeded the limit maximum of 1mW.

THE products of intermodulation ( ad exception of products harmonic of which to the point previous one) measured exit RF of the transmitter not exceed the limit maximum of 1μW within there band of frequency between 87.5 MHz to 108 MHz, is 10μW to the of out of said band of frequency.

Encoder stereo

The codifier stereo is part integral of the modulator digital MF

IS' possible handle in full the codifier stereo both through commands local and by commands remote available on interface web.

over a management whole wheat from inputs, from the codifier stereo is possible to insert is switch off there subcarrier 19KHz is to vary the level from -15 to -25dB respect to the level maximum of the signal multiplex Modulating. There regulation is to stepsof 0.1dB. The value nominal of exercise is -15dB.

Such as required there regulation of the subcarrier 19KHz is of guy relative is of result unity of measure used for the alignment is the dB.

In reference a aforementioned subcarrier 19KHz is possible view, from front panel e on web interface, the values set.

The unit of measure of regulation of sensibility from inputs left is right is the dBu .

The value of the sensibility from inputs left is right set corresponds to the level of the signal audio of entrance that determines the 100% of the deviation. In the calculation of the deviation maxim are considered automatically also the contributions of the levels set for the subcarriers 19 is 57KHz.

A level of the signal audio of entrance higher to the value of the relative sensibility set, leads surgery of the circuit of clipper. this intervention is reported on interface web is from front panel.

THE circuits of clipper provide the three following States: OFF, Normal , Hard. In conditions of normal exercise the circuits of clipper will to be set in modality " Normal ".

On interface web is from panel front is possible view the measure of peak or RMS of the level of the signal audio present at inputs.

Encoder RDS

The codifier RDS is part integral of the modulator digital MF

IS' possible handle in full the codifier RDS both through commands locals both through commands remote available on interface web.

IS' possible to insert is switch off there subcarrier 57KHz RDS is to vary the level from -20 to -35dB respect to the level maximum of the signal multiplex Modulating. There regulation is to steps of 0.1dB. The level nominal of exercise of the subcarrier RDS isequal to -25,5dB respect to the level maximum of the signal multiplex Modulating.

In reference a aforementioned subcarrier 57KHz is possible view, from front panel e on web interface , the values set.

There regulation of the subcarrier 57KHz is of guy relative is of result unity of measure used for the alignment is the dB.

The signal RDS generated responds a norm CENELEC EN 50067 is subsequent updates.

The codifier RDS supports the services dynamic and it's in full compatible with how much expected from recommendation EBU SPB490 is later updates.

The codifier RDS It has of connector RS232 DB9 pin F for entrance data dynamic on protocol UECP (EBU - SPB 490).

IS' allowed there programming of service PS variable. IS' possible to broadcast a only PS static or the alternation of two or more (maximum 5) PS. There frequency of alternation is settable from 2 to 10 sec.

The codifier RDS It allows there retention of # 5 distinct data sets.

The codifier RDS It allows there commutation of date set through command UECP is through command parallel.

The codifier RDS It allows there management of the service TA through command UECP.

The setting from addresses UECP "site address " is “ Encoder address " is possible via interface web.

It is guaranteed there perfect compatibility with the flow UECP of which Yes attach file type (Attachment 5CG).

Features out in operation stereo using MPX inputs or L / R

Feature amplitude frequency (entrance MPX)

there feature amplitude frequency, detected a deviation of frequency constant of

± 75kHz, has a trend uniform from 40Hz to 100kHz, with the following tolerances:

  • from 40Hz till to 43kHz: within ± 0,2dB
  • from over 43 kHz till to 53 kHz: within ± 0.3dB
  • from over 53 kHz till to 100 kHz: within ± 0.5dB

Distortion not linear (entrance MPX)

There distortion harmonica total range of frequency between 40Hz is 15kHz, with a deviation of frequency of ± 75kHz, not exceeds it 0.3%. With a deviation of ± 100kHz there distortion harmonica does not exceed the double of the limit indicated above.There measure it is carried out through a distorsiometro having a band passing till to 100kHz.

There distortion not linear range of frequency between 5 kHz is 100 kHz it is carried out with the method of two tone of equal amplitude (F1 is F2) distant in frequency 1 kHz, whose sum give rise to a frequency deviation of ± 75 kHz.

For half of a demodulator of measure connected to a voltmeter selective, Yes needs to to evaluate there percentage of the product of intermodulation of second order (d2) to frequency difference (F2 - F1) is there sum of two products of third order (d3) to frequency difference (2F2 - F1 is 2F1 - F2). In reporting the percentages a sum of the amplitudes of two tone exit of the demodulator of measure are worth the following limits:

  • from 5 kHz till to 15 kHz: d2   0.1%; d3  0.3%
  • from over 15 kHz till to 100 kHz: d2   0.3%; d3  0.5%

With a deviation of frequency of  100kHz the factors of tone differential not exceed the double of limits indicated above.

Modulation synchronous BUT (entrance MPX)

By modulating the transmitter with a frequency of 400Hz with a deviation of frequency of   75kHz, the value of the modulation of amplitude synchronous resultant It's contained within -45dB reported a modulation of amplitude 100% of the carrier.

Noise of background BUT (entrance MPX)

The noise of background BUT not weighed is contained within -55dB. It is expressed from the value effective of the noise BUT, reported a modulation of amplitude 100% of the carrier. There measure it is carried out with the transmitter not modulated withthe entrance to modulation closed with a resistor shielded of 2000 ohm.

Relationship noise signal on channels TO is B encoded (L / R inputs)

The relationship signal-to-noise not weighed on channels TO is B encoded not needs to to be lower to 65dB. It is expressed from the relationship between the level obtainable in Exit to the decoder, when the transmitter come modulated with a sine curve of400 Hz of amplitude such from to produce a deviation of  75kHz, is the value effective of the noise.

There measure of the noise it is carried out with the transmitter not modulated is with the inputs of the codifier closed with a resistor shielded of 600 ohm.

Non-linear distortion on channels A and B encoded (L / R inputs)

There distortion harmonica total range of frequency between 40Hz is 7.5kHz, modulating the channels TO is B separately for get a deviation of frequency of

 75kHz, not exceeds it 0.3%.

THE products not harmonics, range of frequency over 7.5kHz till to 15kHz, expressed come on factors of tone differential, not exceed it 0.5%.

There measure it is carried out modulating separately the channels TO is B with a deviation of frequency   of 75kHz.

Linear crosstalk between channels TO and B encoded (L / R inputs)

There crosstalk linear between the channels TO is B encoded, measured modulating said channels separately with a deviation of frequency of + 75kHz is recourse use of a voltmeter selective, needs to respect the following limits:

  • from 40 Hz till to 120 Hz:   -40dB
  • from over 120 Hz till to 10 kHz:   -43dB
  • from over 10 kHz till to 15 kHz:   -40dB

Crosstalk not linear between the channels A and B encoded (L / R inputs)

There crosstalk not linear, measured modulating the channels TO is B separately with a deviation of frequency of   75 kHz is recourse use of a distorsiometer for remove there crosstalk linear, respects the following limits:

  • from 40 Hz till to 10 kHz:   -55dB
  • from over 10 kHz till to 15 kHz:   -50dB

Features out in operation monophonic using entrance mono

Feature amplitude-frequency

There feature amplitude-frequency has a trend corresponding to a preenphasys with a constant of time of 50μs, with a tolerance of  0.5dB between 40Hz is 15kHz. that feature needs to to be detected a deviation of frequency constant of   75kHz.

Distortion not linear

There distortion harmonica total range of frequency between 40Hz is 15kHz, with a deviation of frequency of  75kHz, not exceeds it 0.3%. With a deviation of frequency of  100kHz there distortion harmonica exceeds the double of the limit indicated above.

Signal-to-noise ratio

The relationship signal-to-noise not weighed reported a frequency of 400Hz with a deviation of  75kHz not is inferior to 68dB.

Features exit in working with auxiliary channels

There feature amplitude-frequency input AUX has a trend uniform from 21kHz to 100 kHz, with there tolerance of   1dB.

The entrance AUX allows insertion of a signal RDS to 57KHz without altering the features.

There sensibility input is adjustable to steps of 0.1dB is allows , with a signal of entrance of 233mVp.p., a deviation from 2 to 6kHz of the load-bearing main.