Crown Broadcast Ecreso FM 3kW Owner's manual

WorldCast Systems

web: www.worldcastsystems.com - e-mail: contact@worldcastsystems.com

ECRESO FM 3kW

ECRESO MANUAL

87.5 – 108 MHz

FM TRANSMITTER

Date: 2020/03/16

Version: 2.1.x

WorldCast Systems, hereby, certifies that ECRESO FM transmitters comply with the dispositions of applicable

European Community Directives.

A copy of the complete certificates of conformance can be found on the website www.worldcastsystems.com.

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TABLE OF CONTENTS 
INTRODUCTION ............................................................................................................................................ 8 
1.  About WorldCast Systems ....................................................................................................................... 8 
2.  Before you start ..................................................................................................................................... 10 
2.1.  Safety precautions ......................................................................................................................... 10 
2.2.  Factory guarantee .......................................................................................................................... 11 
3.  Licensing information ............................................................................................................................ 11 
DESCRIPTION .............................................................................................................................................. 12 
1. General description..................................................................................................................................... 12 
2. Accessories .................................................................................................................................................. 13 
3. ECRESO FM 3kW Description ...................................................................................................................... 13 
3.1. Front panel........................................................................................................................................... 13 
3.2. Rear panel ............................................................................................................................................ 14 
3.3. Synoptic diagram ................................................................................................................................. 15 
3.4. Power supply ....................................................................................................................................... 16 
3.5. 3U Rack ................................................................................................................................................ 19 
4. Protecting the transmitter .......................................................................................................................... 19 
4.1. Surge Protector .................................................................................................................................... 19 
4.2. Protection against VSWR ..................................................................................................................... 19 
4.3. Protection against high temperature .................................................................................................. 19 
4.4. Protections incorporated into the PSU ................................................................................................ 20 
TECHNICAL SPECIFICATIONS ....................................................................................................................... 21 
1. Environmental ............................................................................................................................................. 21 
2. Power supply .............................................................................................................................................. 21 
3. Physical ....................................................................................................................................................... 21 
4. Interface panel ............................................................................................................................................ 21 
5. RF section .................................................................................................................................................... 22 
6. Composite operation .................................................................................................................................. 22 
7. Stereo operation ......................................................................................................................................... 22 
8. Mono operation .......................................................................................................................................... 22 
9. AF inputs ..................................................................................................................................................... 22 
10. HF output .................................................................................................................................................. 23 
11. Miscellaneous ........................................................................................................................................... 23 
STARTING UP YOUR TRANSMITTER ............................................................................................................. 24 
1. Connecting the transmitter ........................................................................................................................ 24 
2. Using the front panel .................................................................................................................................. 25 
2.1. Setting the transmitter ........................................................................................................................ 25 
2.2. Input selection ..................................................................................................................................... 26 
2.3. Setting the MPX inputs ........................................................................................................................ 27 
2.4. MPX configuration ............................................................................................................................... 28 
2.5. Setting the analog or AES inputs .......................................................................................................... 29 
2.6. Getting on air ....................................................................................................................................... 29 
3. With the embedded web site ..................................................................................................................... 30 
3.1. Network configuration ......................................................................................................................... 30 

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3.2. Connecting to the web interface ......................................................................................................... 30 
3.3. Configuring the transmitter ................................................................................................................. 32 
3.4. Getting on air ....................................................................................................................................... 32 
OPERATION AND PARAMETERS DESCRIPTION ............................................................................................ 33 
1. Overview ..................................................................................................................................................... 33 
2. Local mode .................................................................................................................................................. 33 
3. How to set the inputs.................................................................................................................................. 34 
4. TX/RF parameters ....................................................................................................................................... 34 
5. SmartFM parameters .................................................................................................................................. 36 
6. Input switch parameters ............................................................................................................................. 38 
7. Line 1 (ANA) parameters ............................................................................................................................. 39 
8. Line 2 (AES) parameters .............................................................................................................................. 40 
9. MPX parameters ......................................................................................................................................... 41 
10. Player parameters (audio backup) ............................................................................................................ 42 
11. Audio generator parameters .................................................................................................................... 42 
12. Modulation parameters ............................................................................................................................ 43 
13. Stereo Encoder parameters ...................................................................................................................... 45 
14. RDS / SCA encoder parameters................................................................................................................. 46 
15. Sound process parameters ....................................................................................................................... 47 
16. RDS parameters ........................................................................................................................................ 48 
17. SD card parameters .................................................................................................................................. 54 
18. Date and Time parameters ....................................................................................................................... 54 
19. System parameters ................................................................................................................................... 54 
FRONT SCREEN USE..................................................................................................................................... 56 
1. Overview ..................................................................................................................................................... 56 
2. Working principle ........................................................................................................................................ 56 
3. Structure of the Ecreso FM menus ............................................................................................................. 58 
3.1. Overview .............................................................................................................................................. 58 
3.2. First level measurements ..................................................................................................................... 59 
3.3. First level menus .................................................................................................................................. 60 
3.4. TX PARAMETERS / RF PARAMETERS Menus ........................................................................................ 61 
3.5. SmartFM Menu .................................................................................................................................... 62 
3.6. ALARMS Menu ..................................................................................................................................... 62 
3.7. INPUT SWITCH Menu ........................................................................................................................... 63 
3.8. LINE1 Menu ......................................................................................................................................... 64 
3.9. MPX Ana Menu .................................................................................................................................... 65 
3.10. MPX Digi Menu .................................................................................................................................. 66 
3.11. Audio Gene Menu .............................................................................................................................. 67 
3.12. Modulation Menu .............................................................................................................................. 68 
3.13. Stereo encoder Menu ........................................................................................................................ 69 
3.14. RDS / SCA encoder Menu .................................................................................................................. 70 
3.15. Sound Process Menu ......................................................................................................................... 71 
3.16. RDS Menu .......................................................................................................................................... 71 
3.17. Network Menu ................................................................................................................................... 73 
3.18. COM Menu......................................................................................................................................... 74 
3.19. Power supply Menu ........................................................................................................................... 75 

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3.20. Temp/Fan Menu ................................................................................................................................ 76 
3.21. Time/Date Menu ............................................................................................................................... 77 
3.22. License Menu ..................................................................................................................................... 78 
3.23. SD Card Menu .................................................................................................................................... 79 
3.24. About / System Menu ........................................................................................................................ 80 
3.25. Easy/Expert Menu.............................................................................................................................. 81 
3.26. Exit Menu ........................................................................................................................................... 81 
SERIAL & TELNET COMMANDS .................................................................................................................... 82 
1. Working principle ........................................................................................................................................ 82 
2. Ecreso FM and Ecreso FM Amplifier serial commands ............................................................................... 84 
2.1. System commands ............................................................................................................................... 84 
2.2. Measurement commands .................................................................................................................... 86 
2.3. Transmitter commands........................................................................................................................ 88 
2.4. Configuration commands .................................................................................................................... 89 
2.5. Alarm commands ................................................................................................................................. 91 
2.6. Input commands .................................................................................................................................. 93 
2.7. Encoder commands ............................................................................................................................. 96 
2.8. RDS commands .................................................................................................................................... 97 
2.9. Status commands .............................................................................................................................. 100 
THE EMBEDDED WEBSITE ......................................................................................................................... 101 
1. Introduction .............................................................................................................................................. 101 
2. Connecting to the embedded web site ..................................................................................................... 101 
3. Viewing the Status .................................................................................................................................... 104 
3.1. Synoptic ............................................................................................................................................. 104 
3.2. Logbook/History ................................................................................................................................ 106 
3.3. Advanced measurements .................................................................................................................. 112 
4. Transmitter configuration ......................................................................................................................... 115 
4.1. Easy configuration ............................................................................................................................. 115 
4.2. Main configuration ............................................................................................................................ 116 
4.3. Maintenance ...................................................................................................................................... 121 
4.4. Modulation configuration .................................................................................................................. 124 
4.5. Input Selection ................................................................................................................................... 126 
4.6. Input Sources ..................................................................................................................................... 128 
4.7. Audio backup configuration ............................................................................................................... 131 
5. Setting the RDS data ................................................................................................................................. 132 
5.1. Static encoder .................................................................................................................................... 132 
5.2. Dynamic Encoder ............................................................................................................................... 134 
6. System configuration ................................................................................................................................ 137 
6.1. Product ID .......................................................................................................................................... 137 
6.2. Product configuration ........................................................................................................................ 138 
6.3. Product Backup .................................................................................................................................. 138 
6.4. Date / Time ........................................................................................................................................ 140 
6.5. Network ............................................................................................................................................. 141 
6.6. Communication ................................................................................................................................. 142 
6.7. Users .................................................................................................................................................. 143 
6.8. SNMP Agent ....................................................................................................................................... 144 

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6.9. SNMP Manager .................................................................................................................................. 145 
6.10. SMTP Client ...................................................................................................................................... 146 
6.11. IRT Traps .......................................................................................................................................... 147 
6.12. Traps / Emails................................................................................................................................... 148 
6.13. License ............................................................................................................................................. 149 
6.14. System ............................................................................................................................................. 149 
6.15. Advanced Logging ............................................................................................................................ 150 
7. About ........................................................................................................................................................ 152 
8. Chatting with other users ......................................................................................................................... 152 
SOUND PROCESS ....................................................................................................................................... 153 
1. Overview ................................................................................................................................................... 153 
2. Presets ...................................................................................................................................................... 153 
3. Management using the web interface ...................................................................................................... 155 
3.1. Saving a preset ................................................................................................................................... 155 
3.2. Import/Export .................................................................................................................................... 156 
3.3. Transmitter settings ........................................................................................................................... 156 
4. Sound process parameters ....................................................................................................................... 156 
REMOTE CONTROL AND MONITORING WITH THE GPIO BOARD ............................................................. 159 
1. Introduction ............................................................................................................................................ 159 
2. Standard GPIO board .............................................................................................................................. 159 
2.1. Description of control and monitoring functions ............................................................................ 159 
2.2. Remote control function pinout ...................................................................................................... 160 
2.3. Remote monitoring function pinout ................................................................................................ 160 
2.4. Physical representation of the GPIOs .............................................................................................. 162 
2.5. Management using serial commands .............................................................................................. 163 
3. Analog GPIO board.................................................................................................................................. 164 
3.1. Description of control and monitoring functions ............................................................................ 164 
3.2. Remote control function pinout ...................................................................................................... 165 
3.3. Remote analog monitoring function pinout .................................................................................... 165 
3.4. Remote monitoring function pinout (relays) ................................................................................... 166 
3.5. Physical representation of the analog GPIOs .................................................................................. 167 
3.6. Management using serial commands .............................................................................................. 168 
3.7. Specification of the analog GPIO board ........................................................................................... 168 
EMR ........................................................................................................................................................ 169 
1. Setting up ................................................................................................................................................ 169 
1.1. Connecting for the first time to EMR ............................................................................................... 169 
1.2. Retrieving your account ID .............................................................................................................. 170 
1.3. Setting up transmitters .................................................................................................................... 170 
2. Using EMR ............................................................................................................................................... 171 
2.1. Présentation .................................................................................................................................... 171 
2.2. Viewing the map .............................................................................................................................. 171 
2.3. Dashboard ........................................................................................................................................ 172 
2.4. Reporting ......................................................................................................................................... 175 
2.5. Configuration ................................................................................................................................... 176 
APPENDIX A: SOFTWARE OPTION MANAGEMENT ........................................................................................ 177 
A.1. Using the embedded web site .................................................................................................................. 178 

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A.2. Using the front panel application ............................................................................................................. 179 
A.3. Using serial commands ............................................................................................................................. 180 
APPENDIX B: ADJUSTING THE IMPEDANCE OF ANALOG INPUTS ................................................................... 181 
APPENDIX C: TROUBLESHOOTING ................................................................................................................ 182 
APPENDIX D: MAINTENANCE ........................................................................................................................ 184 
D.1. Installing the air filter ............................................................................................................................... 184 
APPENDIX E: TROUBLESHOOTING PROCEDURES........................................................................................... 185 
E.1. Complete Reset of the ECRESO FM ........................................................................................................... 185 
APPENDIX F: EMR & SECURITY ...................................................................................................................... 186 
F.1. Transmitter Notification Protocol ............................................................................................................. 186 
F.2. EMR Server Security .................................................................................................................................. 186 
FOR MORE INFORMATION ............................................................................................................................ 187 
 

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1. INTRODUCTION

1.1. About WorldCast Systems

WorldCast Group is a global player in media and Industrial Internet of Things (IIoT), with a deep expertise in Radio &

TV. The group is composed of two companies, WorldCast Systems and CONNECT, complementary in their expertise

and added value.

WorldCast Systems is an industry veteran with over 60 years of experience engineering advanced radio and tv

solutions for large network operators, regulation authorities, and media content providers. The company’s expertise

covers the entire broadcast chain from field contribution to audio transmission, FM transmission, RDS encoding, FM

and DAB signal monitoring, measurement, and telemetry.

Headquartered in Bordeaux-Mérignac, the group has offices in Belfast, Miami and Kuala Lumpur and over 85% of its

annual turnover is achieved internationally.

OUR OBJECTIVE

• improve the user experience

• leverage data and infrastructures for customer success

We are present in more than 100 countries to meet our customers’ local needs

WE VALUE

• 360° Innovation

o Collegial management

o Design thinking

o Future-ready designs

o Agile Method

Recognized by industry with 32 awards for innovation

• Enhancing Customer Experience

o Simplicity

o Reliability

o User Experience

o Quality (ISO 9001)

93% of our customers are satisfied or very satisfied

• Sustainable Growth

o Product efficiency

o Low consumption building

o Charitable foundation for local reforestation

7 000 000 kWh saved with new Ecreso FM transmitter range

OUR MISSION

• Keep your audience loyal

…by delivering them a great listening experience with content that is delivered continuously and with the

highest quality.

• Reduce your OPEX

…with broadcast solutions that are competitive at the time of purchase and that continue to drive savings

throughout our products’ lifespan.

• Protect your investment

…with tools that enable optimum operating conditions of your network infrastructure and maximum site

performance.

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KEY COMPANY FIGURES

• 105 employees

• 45% staff in R&D

• 60 years of RF expertise

• +15 000 monitoring systems installed

• + 20 000 audio codecs sold

• + 20 000 transmitters operational worldwide

• + 17 000 RDS encoders sold

• 3 patents

WORLDCAST SYSTEMS EXPERTISE

• Research & Development

• Production & testing

• Systems integration

• Project engineering & support

SERVICES throughout all project phases

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1.2. Before you start

1.2.1. Safety precautions

This equipment complies with international mechanical and electrical standards. To maintain this compliance, as well

as to ensure proper and safe working conditions and avoid electrical shocks and fire hazards, you must comply with

the following recommendations:

• The device should only be utilized in the conditions described in the user manual.

• The device is designed for industrial usage and must only be operated by qualified personnel.

• The device may be heavy; it must be lifted and handled with care, specifically during unpacking and set up.

• Rackable products must be set in cabinet with 19” rack mounting screws.

Electrical precautions

• Disconnect all sources of power before any intervention.

• Any maintenance, adjustment or repair must be carried out by personnel specifically trained by WorldCast

Systems.

• Before switching on the device, make sure the nominal voltage specified on the device matches the mains

nominal voltage.

• The device should only be operated on a stable electrical network. If the electrical network is not stable, a

power conditioner, such as a UPS, must be used

• The device must only be used with a plug that incorporates a protective ground contact.

• To avoid any risk of electrocution, the protective earthing conductor must not be cut, intentionally or

accidentally, either on the device or on the power cord.

• High quality shielded cables are mandatory.

Environmental precautions

• It is necessary to verify that environmental conditions comply with those recommended in the manual.

• Nothing must obstruct the ventilation.

• To avoid any electromagnetic interference, the device must only be used when it is closed, installed in a cabinet

and connected to the earth as per the instructions.

• The device should not be exposed to dripping or splashing and no objects filled with liquids, such as coffee

cups, should be placed on the equipment.

• Connectors may be hot on high power units.

Precautions regarding lithium batteries and beryllium components

This device includes a lithium battery.

If the battery is not correctly replaced, there is a risk of explosion.

• Only replace it with a battery of the same type. Contact us before attempting to use another type

• Do not puncture the battery

• Do not throw the battery in fire

• Do not immerse the battery in water

Beryllium is present in the load and transistor used inside the unit.

• It can be handled safely if unbroken and undamaged, but dust from broken, crushed, or scratched beryllium

can cause severe illness. Never cut or file beryllium.

• If broken beryllium is found, collect all particles carefully, being careful not to touch or breathe it. Package and

dispose of it properly, then wash thoroughly.

Perchlorate material – special handling may apply, see https://dtsc.ca.gov/perchlorate/

Do not throw away used components containing hazardous material, recycle them instead. You may send it back to

us if needed.

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1.2.2. Factory guarantee

WorldCast Systems offers a standard three-year warranty on parts and workmanship from the date the transmitter is

received; this warranty can be extended to five years. WorldCast Systems also offers on compact transmitters of the

range a ten-year warranty.

If precautions listed section 1.2.1 are not followed, the guarantee will be void.

Using multiple captors, a µSD card records operating conditions which allow a precise and quick diagnostic for after

sale services. If missing or if recorded readings show proper operating conditions have not been respected, the factory

guarantee will be void, whether standard or extended depending on the contract subscribed by the client.

In case the client uses the µSD card for the optional audio backup or to retrieve saved configurations;

• the EMR directory must never be erased

• The µSD card must be quickly placed back in its reader. Absence of readings lasting over one week will lead to

the guarantee being void.

• No other µSD card can be used.

• In case of destruction of the µSD card, contact the support service as soon as possible.

! Please refer to section 5.17 if you need to remove the µSD card.

1.3. Licensing information

Use of OpenEmbedded Ångström V20110531, free license software (mainly GPL).

Use of GWT, licence Apache v2.0, free license software.

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2. DESCRIPTION

2.1. General description

The compact Ecreso FM 3kW transmitter includes a direct to channel digital modulator into its 3U chassis and offers a

wide range of on-board features in addition to its core structure of digital modulator, 6

th

generation MOSFET and up

to 76% efficiency. These include a dynamic RDS encoder, stereo encoder, 5-band sound processor, MPX over AES, and

GPIO support as well as Single Frequency Networking. With the launch of the Ecreso FM 3kW Transmitter, the power

range of the compact system is extended to now reach from 100W up to 3kW.

However, the new Ecreso 3kW FM does not only add additional power but also built-in redundancy on the system’s

power supplies, power amplifiers and fans as well as hot-swappable power supplies.

Options available with the current version are:

• SmartFM: developed over 3 years of intense research, this option makes it possible to enhance the listening

experience, reduce FM Operating Costs (Opex) and reduce CO

2

emissions.

• 5-band Sound Processor, which includes:

o Single digital processing from audio to RF (direct to frequency)

o Low Latency and Powerful DSP based algorithms

o Gated and predictive automatic gain control

o Equalization, Bass and Treble Enhancers

o Stereo Enhancer and Limiter

o 5 Band Processors

o 5 Band Limiters

o HF and Final Limiters

o Complete set of audio presets

o Intuitive and complete user interface with settings and vu meters (web based)

o Easy fine tuning of your sonic signature

• Dynamic RDS: the internal RDS encoder makes it possible to manage RDS parameters (PI, PS, TP, TA, PTY, MS,

DI, RT, PTYN, AF, CT) and includes 1 PSN and 2 DSN.

• SFN: this option includes a 10 MHz input to synchronize the RF sub-carrier to an external source and an

embedded memory on the digital modulator to configure the delays which will allow to the synchronization

between the various transmitters.

• GPIO: this additional board allows remote control and management of your transmitter. Available as standard

or analog board.

• Surge protector: to limit the surge caused by lightning, external module.

Please refer to Appendix A for more information on option management.

Project co-financed by the European Union, involved in the Aquitaine Area, through the

European Funds for local development.

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2.2. Accessories

The ECRESO FM is supplied with:

• 1 power cable kit: female insert connector + connector hood + cable gland + seal + connective wire + Allen

key

• 1 RF output inner connector

• 1 interlock plug + locks

• 1 ground strap

• 3 fuses 20 A + 1 fuse 1.6 A

• 1 air filter

• 1 folder including 1 quick start notice.

2.3. ECRESO FM 3kW Description

2.3.1. Front panel

RF monitoring output

Indicators: CPU, Fault,

Warning, RF (3 dB),

VSWR and Interlock

RS232 port

RF on/off and local

mode keys and LEDs

Navigation

keys

LCD display

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Description of indicator LEDs:

 As a rule, green LEDs indicate things are ok, orange LEDs indicate an issue requiring attention, red LEDs indicate a

possible loss of transmission.

• CPU: blinks to indicate CPU activity

• FAULT: major fault of the unit (3 dB, VSWR or audio fault)

• WARNING: minor fault of the unit (ambient temperature, heatsink temperature,

PSU temperature, fan, current, voltage, 1 dB, loss of signal, battery low on startup)

• RF (3dB) : 3 dB of the unit

• VSWR: VSWR of the unit

• INTERLOCK: indicates that internal or external safety links are not activated

• RF: indicates that the unit is on RF=ON. Associated to the RF button

• LOCAL: indicates that the unit is in local mode. Associated to the Local button

 The transmitter is working properly when: the CPU LED blinks, and both the RF LED and the interlock LED are green

2.3.2. Rear panel

1. The safety loops must be closed to ensure the transmitter will work. If nothing is connected to these

connectors, interlock plugs must be present to close the loop.

2. The DIN port is used to reprogram the module (only to be used for maintenance).

3. The COM1 port is used to send serial commands, the COM2 port is used for dynamic PS tags.

4. The µSD card is an external storing device meant to mostly stay in place. Removing and setting it back triggers

error messages visible on the embedded web site; it should therefore only be done during maintenance

operation procedures. See section 5.15 for the µSD card removal procedure.

Mains

RF output

Interlock

1

Ground

RS232 ports COM1

and COM2

3

CAN port

GPIO slot

(option)

MPX/SCA1

MPX/SCA2

19 kHz

Audio input Line1

(Ana or AES)

Audio input Line2

(Ana or AES)

USB

port

Ethernet

port

µSD card

4

DIN

port

2

10 MHz input

(option SFN)

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2.3.3. Synoptic diagram

On transmitters, as standard:

• Line 1 is an analog audio input (Left and Right)

• Line 2 is a digital input (AES, 1 connector)

For an analog mono signal, use the left channel (Mono); for a digital mono signal use the AES input.

Line 1 is not necessarily the main audio channel. Depending on the desired configuration, use Line 2 or MPX inputs as

the main audio source (see section 5.3).

! Do not inject a digital signal on L and R channels, or an analog signal on the AES channel!

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2.3.4. Power supply

2.3.4.1. Power supply module

The ECRESO FM 3kW includes 2 hot-swappable power supply modules (or 3 with redundant configuration)

They providing input current and voltage to the power amplifiers.

They fit into the transmitter chassis.

They are connected in parallel: the loss of one power supply does not impact the RF coupling balance.

Four LEDs give the power supply status:

On: input ok

Blinking: input out of limits

On: output ok

Blinking: overload

On: overtemperature warning

On: fault

Power supplies module front view

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2.3.4.2. Primary distribution board

The primary distribution board is located in the

removable power drawer.

Three screws hold a polycarbonate shield. Remove

them to access fuses.

Auxiliary phase

5x20 1.6 A fuse

Phase 3

6.3x32 20 A fuse

Phase 2

6.3x32 20 A fuse

Phase 1

6.3x32 20 A fuse

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2.3.4.3. Power connector

The ECRESO FM 3kW is supplied with a power connector and accessories to be fitted to a cable for connection to the

mains.

! The cable must be compliant with the IEC 60228 standard, class 5 or 6.

A 2 mm Allen wrench (supplied) and a small flat screwdriver are required to assemble the connector.

! The safety loops must be closed to ensure the transmitter will work. If the safety contacts are not connected to

your security system, close the loop as described in step 1.

1. If the safety contacts are not connected to your security system: strip the supplied connective wire on both

ends and use it to bridge both safety contacts. Push the black levers with the screwdriver to lock the wire.

2. Strip 60 mm off the main cable and 10 mm off the small cables. Do not twist the fine stranded wires.

3. Slide the cable gland, the seal and the connector hood on your cable.

4. Insert cables in the female insert connector as shown on the connector rear view above. With single-phase,

the phase must be connected to all three inputs.

Neutral (3)

Phase 1 (4)

Phase 2 (2)

Phase 3 (1)

Ground

Safety

contact

Safety

contact

Female insert connector, rear view,

three-phase cabling

Phase (4)

Phase (2)

Phase (1)

Ground

Neutral (3)

Safety

contact

Safety

contact

Female insert connector, rear view,

single-phase cabling

Markers numbers

in parenthesis

Female insert connector

Connector hood

Cable gland

Allen wrench

Seal

Power connector assembly

See rear view below

ECRESO FM 3kW, user manual– 03/2020

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WorldCast Systems SAS - 20 avenue Neil Armstrong - 33700 Mérignac (Bordeaux Métropole) FRANCE

+33 (0)5 57 928 928 – www.worldcastsystems.com – contact@worldcastsystems.com

5. Screw the 5 cables firmly in place with a 2 mm Allen wrench on the front side.

! Make sure to not overtighten screws as they may break.

6. Put the connector hood over the connector and fix it with the provided screws.

7. Tighten the cable gland.

2.3.5. 3U Rack

The aluminum rack structure and the structure of the monoblock front panel reinforce the device. The rectangular

outline of the front panel has an LCD display. The transport handles are mechanically interchangeable and can be

removed. The cover is fixed by a set of M3 POZIDRIV screws and can be easily removed. The user has access to every

module to set the parameters of the device.

2.4. Protecting the transmitter

To ensure the transmitter will work with no risk of damage, a series of protections has been set.

2.4.1. Surge Protector

An optional surge protector module can be added to the transmitter. The goal of this module is to limit the surge

caused by lightning. It works after the main protector usually located in the electrical board and before the power

supply protector, thus offering an optimal level of protection. The protector principle is to capture the surge and

divert it to the ground so as to protect the transmitter and its power supplies.

The surge protector used by WorldCast Systems includes multi-MOV technology and a gas discharge tube (GDT) giving

a very high protection and very low parasitic capacitance and leakage currents.

2.4.2. Protection against VSWR

Several systems coexist to offer the optimal protection against VSWR:

• Hardware protection:

In case of open circuit or short-circuit, the RF is cut. When the situation returns to normal, it is automatically

reset. The protection is triggered in case of an overshoot of the reflected power over:

Transmitter power

3 kW

5 kW

10 kW

Threshold

300 W

600 W

• Software protection:

The software protection prevents the transmitter to reach a given reflected power value by blocking the

control or by lowering the power.

Transmitter power

3 kW

5 kW

10 kW

Threshold

150 W

200 W

400 W

• Software settings for the reflected power security management: if the VSWR is greater than 3 in a recurring

way, enabling the VSWR Trip parameter allows disabling then cutting the RF (see VSWR Trip, section 5.4).

2.4.3. Protection against high temperature

The Power Supply module includes its own protector against high temperature: the protector cuts off the power

supply output voltage if the temperature is abnormally high. When the situation returns to normal, it is automatically

reset. The temperature threshold value varies depending on the PSU.

The ambient temperature and the heatsink temperature are monitored.

ECRESO FM 3kW, user manual– 03/2020

Page 20

WorldCast Systems SAS - 20 avenue Neil Armstrong - 33700 Mérignac (Bordeaux Métropole) FRANCE

+33 (0)5 57 928 928 – www.worldcastsystems.com – contact@worldcastsystems.com

• The max ambient temperature is set by software (see menu Temp/Fan, section 6.3.20 or serial command

CONF.AMB.MAX, section 7.2.4), default value is 50°C. In case of overshoot, a Warning alarm is triggered (Alarm

Amb). The default value works when the room temperature is controlled. In case the room temperature is

likely to be greater than 35°C, the value should be increased accordingly, but should not exceed 70°C.

• The max heatsink temperature is set by serial command (see serial command CONF.HEAT.MAX, section 7.2.4).

Default value is 70°C for all power transmitters except 5/10kW and 80°C for ECRESO FM5/10kW. In case of

overshoot, a Warning alarm is triggered (Alarm Heat).

• If the heatsink temperature exceeds 90°C, the RF is cut off and a fault alarm is triggered (Alarm Temp).

2.4.4. Protections incorporated into the PSU

Ecreso FM transmitters have an auxiliary power block and a power block, each having its own protections:

• Against overloads: protects by limiting the current. For auxiliary power supplies, it is a protection against

shorts circuits.

• Against overvoltage.

• Against high temperatures (see previous section).

The main power supply voltage and the auxiliary power supply voltage are monitored as follows:

• Main power supply:

if the difference between the measured voltage and the expected voltage is greater than 10%, a Warning

alarm is triggered (Alarm Volt1). Expected voltage is automatically computed.

• Auxiliary power supply:

Voltage should be either 5, 12 or -12 V. if the difference between the measured voltage and the nominal

voltage is greater than 10%, a Warning alarm is triggered (Alarm Volt Aux).

 For both power supplies, we are monitoring the output voltage (DC); the input is not monitored.

The current is also measured and monitored. The threshold varies depending of the power of the Ecreso FM. In case

of overshoot, a Warning alarm is triggered (Alarm Cur) and the nominal power is reduced.

The system’s PSU are also fully protected against heat, over-voltage and current.

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Crown Broadcast Ecreso FM 3kW Owner's manual

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