Crown FMX30 Manuel d'utilisateur Page 1

©2003 Crown Broadcast, a division of International Radio and Electronics, Inc.25166 Leer Drive, Elkhart, Indiana, 46514-5425 U.S.A.(574) 262-8900

Rev. 1.0FMX30/FMX100/FMX250 User’s ManualI1—61.2.6 SatellatorCrown transmitters include automatic call sign or operating frequencytransmission in a M

Rev. 1.0Getting Acquainted 1—7=Frequency Range 87.9 -107.9 MHzRF Power OutputFMX30FMX100FMX250(VSWR 1.5:1 or better)3-30 watts, adjustable10-100 watt

Rev. 1.0FMX30/FMX100/FMX250 User’s ManualI1—8AM S/N Ratio Asynchronous and synchronous noisebetter than FCC requirementsRF Bandwidth ±120 kHz, better

Rev. 1.0Getting Acquainted 1—9Monaural Sensitivity(demodulated, de-emphasized)3.5µV for signal-to-noise > 50 dB12.6µV for signal-to-noise > 60

Rev. 1.0FMX30/FMX100/FMX250 User’s ManualI1—10Crown Broadcast assumes the responsibility for providing you a safe product andsafety guidelines during

Installation 2—1This section provides important guidelines for installing yourtransmitter. Review this information carefully for properinstallation.

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual2—2You can install the FM transmitter in a standard component rack or on a suitablesurface such as a bench o

Rev. 1.0Installation 2—3Illustration 2–1 Removing the Power Connector CoverIllustration 2–2 Selecting an AC Line Voltage120Vac120Vac220Vac240Vac

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual2—42.2.2 FusesThe fuse holders are located in the power connector assembly just below the voltageselector. :

Rev. 1.0Installation 2—5The transmitting frequency for Crown FMX series transmitters is set from a frontpanel control. However, you must set the modu

Rev. 1.0FMX30/FMX100/FMX250 User’s ManualiiRevision Print DateRev. 1.0 Jan

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual2—6If you have a transmitter equipped with the receiver option, you will need to set thereceiving or incomin

Rev. 1.0Installation 2—7Freq SW1 SW2 Freq SW1 SW2 Freq SW1 SW2 Freq SW 1 SW287.9 0 0

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual2—8Connect the RF load, antenna or the input of an external power amplifier, to thetype-N, RF output connect

Rev. 1.0Installation 2—9Attach audio inputs to the Left and Right XLR connectors on the rear panel. (TheLeft channel audio is used on Mono.) Pin 1 of

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual2—10Illustration 2–8 Audio Input CircuitC501220PFR5021KR5011KR5031KR5041K123J502XLR123J501XLR12348765A501DIP

Rev. 1.0Installation 2—11You can connect external SCA generators to the SCA In connectors (BNC-type) onthe rear panel. The inputs are intended for th

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual2—12Processed, de-emphasized samples of the left and right audio inputs to the stereogenerator are available

Rev. 1.0Installation 2—13You can enable an automatic turn-off of the carrier in the event of program failure.To enable this option, selecte a setting

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual2—14Remote control and remote metering of the transmitter is made possible through a15–pin, D-sub connector

Rev. 1.0Installation 2—15Pin Number Function1 Ground2 (no connection)3 Composite Out (sample of stereo generator output)4 FSK In

Rev. 1.0iiiTable of ContentsTable of Contents iiiSection 1—Getting Acquainted1.1 Your Transmitter ...

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual2—16

Operation 3—1This section provides general operating parameters of yourtransmitter and a detailed description of its front panel displayand controls.

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual3—2These steps summarize the operating procedures you should use for the initialoperation of the transmitter

Rev. 1.0Operation 3—3Carrier SwitchThis switch controls power to the RF amplifiers and supplies a logichigh to the voltage regulator board, which ena

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual3—43.2.2 DC BreakerThe DC breaker, on the rear panel, must be on (up) for transmitter operation, evenwhen us

Rev. 1.0Operation 3—5When initially powered, the main function list is displayed. Use the control knob toselect one of the main functions. When a mai

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual3—6DPC Version : Software version of the Digital Power Control.MDC Version : Software version of the meterin

Rev. 1.0Operation 3—7New password : Change the Settings password.Factory reset : Returns user settings to factory settings.Back: Returns to previous

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual3—8These steps summarize the operating procedures you should use for the initialoperation of the transmitter

Rev. 1.0Operation 3—9PS DC V : Supply DC volts varies by model:45 volts with the carrier on and 50 volts with the carrier off for both the FMX30 andF

Rev. 1.0FMX30/FMX100/FMX250 User’s Manualiv3.3.1 Passwords...

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual3—10

Principles of Operation 4—1uen ha' e nta ciuen ha' e nta cita ciuen ha'e nta cita ciu en h a'e nta ci'e nta ciThis section di

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual4—2Illustration 4-1 Block Diagram

Rev. 1.0Principles of Operation 4—3The audio processor board (Illustration 4-2) performs five functions:• Balanced input amplifier• Gain selection• L

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual4—4The RC networks in the processor use three different time constants to cover avariety of signal condition

Rev. 1.0Principles of Operation 4—54.3.2 Stereo GeneratorThe 19 and 38–kHz subcarriers are digitally synthesized from a master 7.6 MHzcrystal oscilla

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual4—6The RF Exciter Circuit board is also known as the Frequency Synthesizer board. Theentire component side o

Rev. 1.0Principles of Operation 4—7The frequency synthesizer also produces a lock signal. This signal is inverted andbuffered to produce both lock an

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual4—8The transmitter is controlled from a single, push-and-turn control knob. LEDsilluminate the ring around t

Rev. 1.0Principles of Operation 4—9For delay times, see Table 4-1, Program Delay Settings. The times are proportionalto the value of R721; times can

Rev. 1.0Getting Acquainted 1—1IINFORMATIONThis section provides a general description of the FMX30,FMX100, and FMX250 transmitters and introduces yo

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual4—10Input transformer is made up of two printed circuit boards. A four-turn primaryboard is separated from a

Rev. 1.0Principles of Operation 4—11The RF low-pass filter/reflectometer are located in the right-hand compartment onthe top of the chassis.A ninth-o

Rev. 1.0FMX30/FMX100/FMX250 User’s Manual4—12the synthesizer to the selected frequency to produce an intermediate frequency of10.7 MHz.The 10.7 MHz I

Service and Support 5—1We understand that you may need various levels of support or thatthe product could require servicing at some point in time. Thi

FMX30/FMX100/FMX250 User’s Manual5—2The product warranty (see opposite page) outlines our responsibility for defectiveproducts. Before returning a pro

Service and Support 5—3Three-Year Limited WarrantyNorth America OnlySUMMARY OF WARRANTYWe, Cr own Broadcast, a business unit of Inter nat ional Radio

FMX30/FMX100/FMX250 User’s Manual5—4Factory Service InstructionsTo obtain factory service, complete the bottom half of this page, include it with the

Rev. 1.0FMX30/FMX100/FMX250 User’s ManualI1—2The FMX30, FMX100, and FMX250 are members of a family of FM stereo broadcasttransmitters. Crown transmit

Rev. 1.0Getting Acquainted 1—3Crown transmitters are designed for versatility in applications. They have been usedas stand-alone and backup transmitt

Rev. 1.0FMX30/FMX100/FMX250 User’s ManualI1—41.2.1 Stand-AloneIn the standard configuration, the FMX30, FMX100, and FMX250 are ideal stand-alone tran

Rev. 1.0Getting Acquainted 1—51.2.5 TranslatorThe FMX30R receiver option replaces the audio processor and stereo generatorboards with a receiver mod