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User Manual
FMTX250
Stereo FM Transmitter with integrated
Audio Processor, Stereo Encoder and RDS Encoder
WARNING!
This Transmitter is capable of generating extremely high RF
potential. Touching internal parts, or the connected antenna
system, will cause serious RF burns. Antenna systems should be
installed such that exposure by any person to RF fields cannot
exceed safe limits. The permitted limits vary from country to
country. Expert advice should be sought about the safe
installation of this transmission system.
RISK OF FIRE!
RF (Radio Frequency) energy could cause ignition of combustible
surfaces during fault conditions. Installation should be left to
qualified personnel. RF can cause burns to skin. Ensure antenna
systems and feeder cables are not situated near, or could fall
onto, any combustible surface.
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Table of Contents
Related Manuals for Lucoro Broadcast FMTX250
Summary of Contents for Lucoro Broadcast FMTX250
- Page 1 User Manual FMTX250 Stereo FM Transmitter with integrated Audio Processor, Stereo Encoder and RDS Encoder WARNING! This Transmitter is capable of generating extremely high RF potential. Touching internal parts, or the connected antenna system, will cause serious RF burns. Antenna systems should be installed such that exposure by any person to RF fields cannot exceed safe limits.
- Page 2 WARNING! Never operate this device without a suitable 50 ohm load connected to the RF OUTPUT socket, or without a suitably installed and matched antenna system connected. Although the output of this transmitter is protected against antenna load faults, MIS-OPERATION MAY RESULT IN DAMAGE NOT COVERED BY ANY WARRANTY.
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Page 3: Before Operating
USB port, using a Windows™ Laptop or PC. Free software is available at https://lucorobroadcast.com/support At the heart of the FMTX250 is a high quality PLL modulator, and the RF Power Amplifier uses the latest high-gain Enhancement Mode MOSFET device, achieving new levels of efficiency and reliability. - Page 4 All operation and user instructions should be followed. Use of this device into a radiating antenna requires a valid licence from a Spectrum Management Authority in most countries. Use of this device as part of a transmission system, or combined transmission system not specified by the manufacturer, may require further testing to ensure that it remains compliant with the essential requirements and other relevant provisions of current EU Low Voltage,...
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Page 5: Controls And Connectors
The unit should be cleaned only as recommended by the manufacturer. The transmitter should be serviced by qualified service personnel if it does not appear to operate normally, exhibits a marked change in performance, has been subjected to shock, damage, moisture, or if foreign objects have ingressed. - Page 6 5. AF MON BNC connector for monitoring of the input to the modulator (baseband MPX spectrum). 6. RF MON BNC connector for monitoring of the RF output. Output level will be the RF output level attenuated by approximately 40dB. Not to be used for measurement of harmonics.
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Page 7: Installation
Pin 9. RF Mute Control. Supplying between 5 and 12V this pin to (with reference to chassis ground potential) will mute the RF output. Primarily used in automated changeover systems. Pin 6, 7, 8 GND connection, at chassis earth potential. The above ‘Open Collector’... - Page 8 Using the front panel display and buttons, set the desired transmission frequency. Power down the unit, wait a few seconds and, whilst pressing ENTER for 5 seconds, power up the unit. After a short while, the currently set frequency will appear on the display. Use the UP and DOWN buttons to select the desired frequency.
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Page 9: Operation
Operation The FMTX250 is designed for continuous reliable transmission, however the fans must be periodically checked for correct operation and free airflow. The front panel display shows the transmission frequency, forward power level ( ), reflected power level ( ) and audio input levels (ahead of any audio processing). - Page 10 The system is running too hot and has shut down the RF TEMP! output as a safety precaution. Check the fans for correct operation. Also check the antenna system, including all cabling (and/or filters and/or combiners where fitted) for correct operation.
- Page 11 York YO51 9FS hereby take sole responsibility to confirm that the product: FMTX100, FMTX250 (and versions thereof with M and RBRX suffix) which this declaration refers to, conforms to all applicable requirements of EU Directive 2014/53/EU and is CE marked...
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Page 12: Technical Specifications
Technical Specifications Frequency range 87.5 to 108.00MHz Frequency stability Better than ±200Hz Output power 30 - 250W Harmonic & spurious output -75dBc typical AM Noise <0.5% @ ±40kHz deviation <0.15%@ ±75KHz deviation RF output connector ‘N’ type (F) Monitoring: BNC (F) -40dB 50 ohms BNC (F) 1V P-P 10K ohms Audio Interface: Audio Input Level... - Page 13 WEEE - Waste Electrical and Electronic Equipment The equipment that you bought has required the extraction and use of natural resources for its production. It may contain hazardous substances that could impact health and the environment. In order to avoid the dissemination of those substances in our environment and to diminish the pressure on the natural resources, we encourage you to use the appropriate take-back systems.
- Page 14 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.
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