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Lucoro Broadcast TX-FMBR1, Technical Manual

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TX-FMBR1 

FM Broadcast Repeater with 

audio (MPX) and RDS back-up

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Index 

 

 

 

IMPORTANT! 

 

Do not misconstrue any Information as our recommendation to use any 

product, process, or equipment in conflict with any regulatory authority or 

patent. NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR 

IMPLIED, OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE 

OR OF ANY OTHER NATURE ARE MADE WITH RESPECT TO ANY 

PRODUCT. 

 

Ensure compliance with all applicable safety requirements when installing or 

using   this equipment, and operate in accordance with local laws governing 

the use of radio transmission equipment.  

 

            Technical Manual 

Summary of Contents for TX-FMBR1

Page 1: ...atory authority or patent NO REPRESENTATIONS OR WARRANTIES EITHER EXPRESS OR IMPLIED OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE OR OF ANY OTHER NATURE ARE MADE WITH RESPECT TO ANY PRODUCT Ensure compliance with all applicable safety requirements when installing or using this equipment and operate in accordance with local laws governing the use of radio transmission equipment Technical Man...

Page 2: ... 4 3 Operation 10 4 4 Settings 11 4 5 Co channel Operation 11 5 Internal Adjustments 5 1 Transmitter Carrier Frequency Trim 12 5 2 External Audio MPX Input Modulation Level 12 5 3 Internal RDS Encoder Injection Level 12 5 4 Receiver Modulation Level 12 5 5 Updating RDS Content 12 6 RS485 6 1 Protocol 14 6 2 Message Structure 14 6 3 CRC Cyclic Redundancy Check 15 6 4 Read Commands 15 6 5 Write Comm...

Page 3: ...ucoro Broadcast in the UK Lucoro Broadcast shall not be liable for any direct indirect incidental consequential or other damage or loss alleged in connection with the supply or use of this product The information contained in this document is subject to change without notice Lucoro Broadcast makes no warranty of any kind with respect to this information Lucoro Broadcast specifically disclaims the ...

Page 4: ...er has a sensitive Front End and high performance IF section ensuring a high quality MPX signal is recovered with low Signal to Noise levels thus providing an accurate rebroadcast of the parent station The unit can be controlled directly using the simple rear interface to control audio break in and muting and to provide basic telemetry alarm functions A more comprehensive remote control interface ...

Page 5: ...ot situated near or could fall onto any combustible surface Installation must adhere to safety regulations and the requirements of the relevant authorities We recommend that at least two people are present during installation Keep a file containing installation instructions and plans including details of the transmission system antennas feeders filters etc and operating instructions for all equipm...

Page 6: ...s not defeated Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them paying particular attention to cords and plugs and the point where they exit from the transmitter The unit should be cleaned only as recommended by the manufacturer The power cord of the transmitter should be unplugged from the outlet when left unused for a...

Page 7: ...and a 3 Amp fuse in the plug or at the distribution panel to this socket A 2 Amp time delay fuse is fitted in this connector MPX IN BNC Socket Unbalanced multiplex input Connect a 8dB For 75kHz deviation unbalanced MPX feed to this socket MPX OUT BNC Socket Unbalanced multiplex output This is a fully buffered loop output for feeding other transmitters with the same audio source The gain is set to ...

Page 8: ...N 8 GND PIN 9 GND Pins 1 2 and 3 are Open Collector outputs capable of operation up to 50V and sinking a current of 75mA maximum Outputs are high ie pull low when the condition is good provide inherent power failure or connector failure signalling possibilities for the user Pin 4 Ground this pin to AUX IN MPX input Break in mode Pin 5 Ground this pin to mute the RF Output if desired All signals mu...

Page 9: ...Lucoro Broadcast TX FMBR1 Technical Manual Page 8 ...

Page 10: ...Lucoro Broadcast TX FMBR1 Technical Manual Page 9 3 3 Display ...

Page 11: ...RANTY Upon power up the display will show the unit s firmware release number 4 3 Operation In Receiver Mode the unit will rebroadcast FM signals received via its integral tuner The display will show the signal strength icon and the received signal level If no signal is present on the selected frequency the RX alarm will be present on the CONTROL I O of the rear 9 way D I O CONTROL connector pin 4 ...

Page 12: ...o store The setting will be held in non volatile memory SET RECEIVER FREQ Once highlighted press OK Use the UP and DOWN push buttons to select the desired Receiver frequency Press OK to store The setting will be held in non volatile memory DATA BUS ADDRESS Once highlighted press OK Use the UP and DOWN push buttons to select the unit s desired RS485 Address Press OK to store The setting will be hel...

Page 13: ...ment connected to the unit 5 3 Internal RDS Encoder Injection Level Connect a Deviation Meter to the front panel RF MON BNC socket Adjust VR2 on the PCB for desired deviation 5 4 Receiver Modulation Level Connect a Deviation Meter to the front panel RF MON BNC socket Adjust VR3 on the PCB for desired deviation normally 1 1 equal to the parent station 5 5 Updating RDS Content The RDS can be updated...

Page 14: ...Lucoro Broadcast TX FMBR1 Technical Manual Page 13 Load the Windows USB RDS program and enter the required RDS content ...

Page 15: ...nt byte is sent first The protocol is ASCII oriented For the transmission of a message each byte is ASCII coded meaning that two ASCII characters are used to transmit one useful byte For example the message byte 0xF3 will be transmitted as 0x46 F ASCII code plus 0x33 3 ASCII code A Complete message is AD ID DATA CRC SUFFIX CR LF CR LF is the 2 ASCII characters Carriage Return 0x0D and Line Feed 0x...

Page 16: ... reply in the same way Reply AD XOR ID XOR DATA XOR DATA CRC Byte 6 4 Read Commands TXFMBR1 Command Set Identifier Decimal Identifier Hex Data field Byte Size Get TX Frequency Setting 101 0x65 0 Get RX Frequency Setting 102 0x66 0 Get TX Power Setting 103 0x67 0 Get Voice Break in Control Setting 104 0x68 0 Get Mute TX RF Control Setting 105 0x69 0 ALARM RX Signal Loss 201 0xC9 0 ALARM TX Forward ...

Page 17: ...1 Command Description This command is used to set the Transmission Frequency Byte 1 to 2 Value of the centre Frequency expressed in NNNN x100kHz 875 to 1080 Default 980 Byte 1 is the MSB and Byte 2 is the LSB For example 98 0 should be coded as 0x03 0xD4 Notes Further communication will be inhibited whilst the unit reboots Allow the process to complete before sending any more data Set RX Frequency...

Page 18: ... Write Identifier 4 0x04 Command Description This command is used to activate or deactivate the Voice Break in feature Byte 1 to 2 0 Off or 1 On Default 0 Off Byte 1 is the MSB and Byte 2 is the LSB For example activation of the voice break in should be coded as 0x00 0x01 Notes RS485 cannot turn off a TLL ON Control I O command Mute RF Output Power Command Type Write Identifier 5 0x05 Command Desc...

Page 19: ...requency Command Type Request Identifier 102 0x66 Command Description This command is used to get the current Receive Frequency setting Byte 1 to 2 Value of the Frequency expressed in NNNN x100kHz 875 to 1080 Default 980 Byte 1 is the MSB and Byte 2 is the LSB For example 98 0 should be coded as 0x03 0xD4 Notes Read RF Output Power Command Type Request Identifier 103 0x67 Command Description This ...

Page 20: ...nt status of the RX mute alarm Receiver signal loss Byte 1 to 2 0 Off or 1 Alarm On Byte 1 is the MSB and Byte 2 is the LSB Notes Read Forward Power Status ALARM Command Type Request Identifier 202 0xCA Command Description This command is used to get the current status of the Transmitter RF alarm TX fail Byte 1 to 2 0 Off or 1 Alarm On Byte 1 is the MSB and Byte 2 is the LSB Notes Read RF Mute Sta...

Page 21: ... used to get the current status of the reflected RF power alarm Byte 1 to 2 0 Off or 1 On Byte 1 is the MSB and Byte 2 is the LSB Notes Read Alarm TX PLL Status ALARM Command Type Request Identifier 204 0xCC Command Description This command is used to get the current status PLL alarm TX fail Byte 1 to 2 0 Off or 1 On Byte 1 is the MSB and Byte 2 is the LSB Notes ...

Page 22: ...ntrol ON 01 05 00 01 05 0D 0A Reply 01 05 00 01 05 0D 0A Set Mute TX RF Control OFF 01 05 00 00 04 0D 0A Reply 01 05 00 00 04 0D 0A Command Address Identifier Message Message CRC Suffix Suffix Get TX Frequency 01 65 64 0D 0A Reply example 98 0MHz 01 65 03 D4 B3 0D 0A Get RX Frequency 01 66 67 0D 0A Reply example 103 0MHz 01 66 04 06 65 0D 0A Get TX Output Power 01 67 66 0D 0A Reply example 990mW 0...

Page 23: ...R1 Technical Manual Page 22 The image below shows communication using HyperTerminal TM on a Windows TM PC The request is to change the Receiver s frequency to 98 0MHz The TX FMBR1 s answer is shown which confirms the request ...

Page 24: ...rective 2014 53 EU and is CE marked accordingly Low Voltage Directive 2014 35 EU EN60215 1996 Safety Requirements for Radio Transmitting Equipment EMC Directive 2014 30 EU EN301489 1 ERM EMC for Radio Equipment Specific Conditions for FM Transmitters Part 11 Radio Equipment Directive 2014 53 EU EN302018 2 Transmitting Equipment for FM Radio Broadcasting service The following operation conditions a...

Page 25: ... Output Impedance 25 Ohms Receiver Frequency range 87 5 to 108 00MHz in 100KHz steps Antenna 75 ohms Useable sensitivity 6dBuV typical Signal to Noise ratio 65dB 98MHz typical IF rejection 90dB 98MHz typical AM suppression ratio 50dB typical Effective selectivity 75dB 400kHz typical Mute Level 70dBm Power Supply Input AC 90V to 250V 50 60 Hz Consumption 9W at 230V 50Hz Mechanical Size mm Size 43 H...

Page 26: ...st TX FMBR1 Technical Manual Page 25 Lucoro Limited Clay Pit Lane Bar Lane Industrial Estate Roecliffe York YO51 9FS Telephone UK 01423 313550 Telephone International 44 1423 313550 Enquiries engineering lucoro co uk ...

Page 27: ...stances in our environment and to diminish the pressure on the natural resources we encourage you to use the appropriate take back systems Those systems will reuse or recycle most of the materials of your end life equipment in a sound way The crossed out wheeled bin symbol invites you to use those systems If you need more information on the collection reuse and recycling systems please contact you...

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