CZH618F-1000C 1KW FM transmitter User Manual
Contents
1. 10 Indicator light UNE Paes We Gk SLE m Safety Notice 1 Please read the following safety points in order to avoid the accidents and prevent the connecting machines to be broken 2 Only the qualified maintenance workers can operate the service 3 Prevent the fire and the bodily injury a Use the proper wire If not it will cause the fire and the bodily injury b Ensure the machine connect the ground Please confirm whether the machine has connected the ground through the wire and the lead to prevent the electric shock c Use the proper fuse Please use the stipulated type and rating fuse d Provide good ventilation This machine adopts the natural convective radiation Fix it correctly to keep it radiating well 4 Please don t disassemble and repair by yourself when it s broken down Please send to the professional service department to solve the problems CAUTION Please don t assemble the machine in the moist environment Please don t assemble the machine in the easy exploding environment Please don t repair by yourself 1 Overview CZH618F 1000 500C digital FM broadcast transmitter combining with audio modulation and IKW power amplifier is an excellent digital product that owns the highest and newest technology The whole machine adopts2. Frequency 97 50 MHz Power Percentage 0 0 Audio Gain 0 dB Audio Input Digital audio stereo modulation Pre emphasize 50 us Modulating deviation 75 0 KHz Pilot deviation 7 5 KHz AGC enable Baud rate 9600 bps Address 0 Remote OFF Period Control OFF Password 000000 23 9 2 12 PASSWORD Menu Figure 9 12 Page of Password set Change password enter new password in New edit box and enter the same new password again in Again box If two enters are the same it will display change password successful else display Different password try again Just select EXIT if do not want change password The initial password is 000000 Password Control Enter Set and Preset menu need password checking when Password Control is ON there is no password check when Password Control is OFF EXIT return to its parent menu 10 Indicator light At the left side of the front panel there are 8 LED lamps used to indicate all kind of system status Three of them are green one is yellow and the other four is red If one of the red lamp is light it means that there is something wrong users can find out the problem at the STATUS menu 10 1 Lamp for Power on When it is power on the voltage of 5V is supplied normally this green lamp is luminous 10 2 Lamp for RF When the RF SWITCH in the main menu is set to ON and the POWER SET percent is more than O this green lamp is light 10 3
3. modulation deviation audio gain audio input and modulation mode see Set menu pre emphasis pilot deviation amplifier voltage 48V in normally current of driver amplifier current of amplifier module A current of amplifier module B current of amplifier module C current of amplifier module D temperature of amplifier baud rate used for serial communication device address used for remote control remote control switch date time period control EXIT return to its parent menu 9 2 5 Page of STATUS Figure 9 5 Page of STATUS Two pictures in Figure 9 5 show the status of all parameters users can find out the system is running normally or not RF OUTPUT Normal OFF Drop Refer to control logic section Normal RF output is in normal status OFF RF power is off Drop RF power can not achieve to its setting power SYSTEM Normal Error Indicate system errors Contact equipment provider when error happens FWD POWER Normal Warning Protect Normal forward power is normal Warning forward power is higher than setting power Protected forward power is too high RF power is turned off RFL POWER Normal Warning Protect Protect H Normal reflect power is normal Warning reflect power 1s high may cause RF power drop Protected reflect power is too high RF power is turned off AMP VOLTAGE Normal Warning Protect Normal amplifier voltage is normal Warning amplifier voltage 1s high may cause RF power dr
4. 1 CZH618F 1000 500C transmitter structure and function 4 Test Instrument Table 4 1 Test instrument for CZH618F 1000 500C transmitter 5 Test and Maintenance CZH618F 1000 500C Digital FM Transmitter is a high performance Transmitter its Technical Specifications are complete meet FM Transmitter s National Standard amp Industry Standard and as a new type of high tech Digital Product a lot of its Technical Specifications are better than National Standard amp Industry Standard 5 1 Performance Test CZH618F 1000 500C Digital FM Transmitter is the Compact product So it only needs One Time Testing of the Entire Machine if the testing report doesn t meet its technical specifications by the same accuracy instrument please repair it in professional department or original manufacturer 5 1 1 Audio Performance Test Audio FM Analyzer Demodulation Wattmeter Figure 5 1 connecting for audio analyze Audio a Connect transmitter and test Instrument with cable according Figure 5 1 RF b Make audio analyzer output 400Hz OdBm c Finely adjust audio output level until demodulation reaches 75 KHz 100 modulated d Scan audio output frequency from 30Hz to 15kHz record frequency response lt 0 1dB and distortion 0 1 e Scan audio output frequency from 30Hz to 15kHz record stereo separation typical gt 50dB f Set audio analyzer to 1kHz exciter pre emphasis to 50us demodulator to 50us
5. de emphasis adjust audio analyzer power output until demodulation reaches 75 KHz record mono SNR gt 75dB and stereo SNR gt 70dB 5 1 2 Carrier Freguency Accuracy Test Dumm Universal Transmitter Wattmeter y Attenuator Load Counter Figure 5 2 connecting for carrier frequency test a Connect the test instrument to transmitter according to Figure 5 2 b The test carrier frequency accuracy 200Hz 5 1 3 Harmonic Suppression N Spectrum Transmitter Wattmeter Attenuator p Analyzer Figure 5 3 connecting for spectrum analyzer a Connect the test instrument to transmitter according to Figure 5 3 b Record harmonic suppression relative to carrier lt 60dB 5 2 Maintenance It needs to use new fans instead of the old ones which have worked more than 15000 hours If the digital FM broadcast transmitter works at a very dirty environment for example a place with much of dust it must be to replace fans ahead of schedule 6 Panel Description 6 1 Front Panel Lamp 1 DHA ia DIGITAL FM TRANSMITTER E x amp pae of w AA Tine FT W E Nas yy S mS a4 at Ww 1 W dH m 11 6 2 Back Panel 7 Power On Sequence 7 1 Open the package check appearance switch key button socket and interface port on front and back panels 7 2 Turn power switch on the OFF position and connect power cord to power source 7 3 Connect RF out port to a 50 Ohm dummy load
6. is display only menu select menu used to select sub menu or goes back to its main menu edit menu used to enter parameters or configure the system How to enter parameter Just scroll highlight bar to desired edit item and press O use A or V to change parameter and press O again to save it Some important parameter or operation may need further confirmation In this case a Y or N will appear after editing at the end of the edit line Use A or V to select Y confirm or N cancel and press O to save updated parameter or cancel it Parameter can not be modified locally when remote is enabled except Remote itself 9 1 3 Return to Main Menu When there is no operation press button for a long time system will return to its main menu automatically with LCD backlight off Not saved updated parameter will be replaced with its old value 9 1 4 LCD backlight LCD backlight will be automatically turned off when there is no operation for a long time and turned on immediately when any key is pressed 9 2 Pages Description 9 2 1 System Boot Up Figure 9 Page of system boot up During the system boot up company logo is displayed and all LED on front panel blinks 4 times power LED is on After system booting up it enters to the page displaying frequency and power set 9 2 2 Setting parameter display Figure 9 2 The Page displaying setting parameters Frequency and Power set percent the most important setting p
7. muser fmuser net FMUESR CZH618F 1000C IKW Digital FM Broadcast Transmitter User s Manual CONTACT Email rita fmuser net Web www fmuser net Phone 86 020 87597795 804 Mob 86 13580359764 MSN rita_cai_jxpx hotmail com Skype rita cai87 Address Room1502 Huilan Ge No 273 HuangPu Road West Tianhe District Guangzhou China 510620 Please notice this Read safety notice first 2 A 50 Ohm dummy load or antenna and cable must be connected before turning power on avoiding water going into the connecters or the cable 3 Please read System Control Logic section to fully understand how the system works 4 Please read the Power On Sequence Contents Safety Notice 1 Overview lll ll ll ll eLL LLL e eee 2 Technical Specifications 3 System Structure and Function 4 Test Instrument 5 Test and Maintenance 6 Panel Function Description 7 Power on Sequence 8 System Control Logic 9 Description for software use
8. or antenna through a cable 7 4 Turn power on 7 5 Set RF logical control see detail in System Logic Control 7 6 Set RF power 7 7 Set parameters such as frequency digital analog audio input select stereo mono select audio eain modulation deviation pre emphasis 7 8 Turn on RF power 8 System Control Logic 8 1 RF Output Control The RF output of CZH 618F 1000 500C digital FM broadcast transmitter is controlled by switches RF Switch in main menu and period control switch in RTC menu RF Switch When RF Switch is off turn off RF power When RF Switch is on and Period Control is disabled turn RF power on to setting power When RF Switch is on and Period Control is enabled RF power is controlled by Period USER S MANUAL FOR CZH618F 1000 500C TRANSMITTER 12 Control function see Period Control Period Control When RF Switch is on and Period Control is enabled the control method is as follow The system reads current time through RTC and check whether current time is falling into any of the three periods If yes turn on RF power to its setting power Else turn off RF power A period is invalid if start time 1s greater than or equal to end time Current time will never fall into an invalid period If three periods are all invalid turn RF power off for ever 8 2 Remote Control Remote control is set in SET menu When remote control is enabled remote LED on front panel is lit and parameters are controlled by remote
9. Lamp for AUDIO If the audio input mode is set to be the stereo the lamp is light 24 10 4 Lamp for REMOTE In the page of General Set if Remote is enabled this yellow light is illuminant 10 5 Lamp for TEMP When the amplifier temperature is higher than 65 C the red lamp is light higher than 70 C to decrease temperature and to protect amplifier the system will try to decrease output power if temperature exceeds 75 C it will power off immediately 10 6 Lamp for VSWR If reflected power is higher than 5 of rated power the lamp is light higher than 7 of power it will decrease output power to decrease reflected power when it 1s higher than 100W it may happen that the software power off the output or the hardware circuit switch off the power supply then power on again 10 7 Lamp for GENERAL If this lamp is light it may happen that forward power is more than 103 of rated power voltage of power supply is lower than 47 5V or higher than 50V driver current is higher than 1 0A at list one amplifier mode current is higher than 9 5A the unbalance current is more than 5 3A if forward power is more than 10796 of rated power voltage of power supply 1s higher than 52V driver current is higher than 1 2A at list one amplifier mode current is higher than 11A the unbalance current is more than 5 6A the system will try to decrease RF power If in sometime system cannot change this status it will shut down then power on
10. Step 10kHz y Output Power Continuous adjustable to setting power y Power Accuracy 1096 y Power stability lt 3 y Output Impedance 500 y RF Output connector y SFDR y Residual Amplitude Modulation y Carrier Frequency accuracy y Frequency Stability y Modulation Deviation y Pilot Frequency y Pilot Amplitude y Analog Audio Input Impedance y Audio Input Level y Digital Audio Input Impedance y Digital Audio Input Level y Digital Audio Sample Rate y Audio gain y Pre emphasis y LR Channel Level Difference y Frequency Response y THD y Stereo Separation y SNR y Power Supply y Heat dissipation Physical Specification N 50K lt 70dB lt 50dB 200Hz 1x10 0 120KHz 100 75kHz 19kHz 0 1Hz 0 12KHz 10 7 5K 6000 Balance 12dBm 8dBm Step 0 1dBm 110Q Balance optional 0 2 10Vpp optional 30kHz 96kHz optional 15dB 15dB step 0 1dB Ous 50ps 75us lt 0 1dB 100 Modulation lt 0 1dB 30Hz 15000Hz lt 0 1 30Hz 15000Hz gt 50dB type 30Hz 15000Hz gt 70dB type IKHz 100 Modulation AC180V AC260 47Hz 63Hz Forced ventilation y Casing Size 3U 484mm X 88mm X 600mm 19Inch y Weight 31 5 0 2kg y Ambient temperature 5 C 440 C y Relative Humidity lt 95 y Sea Level Height lt 4500m 3 System Structure and Function CZH618F 1000C digital FM broadcast transmitter is composed of five parts Power Supply Main Control and Display Cell Audio Processing and Freque
11. arameters appear in this page after that when this page is disappeared the system will slowly increase output power if users do not accept these two parameter it s should to keep any of the keys in push more than 5 seconds then when it enters the main menu page in will not to transmit any power 9 2 3 Main menu page Figure 9 3 Main menu page Figure 9 3 shows main menu page The audio bar displays at the left of the page The scale means modulation deviation This page contains the parameter as following RF SWITCH RF switch control select between ON or OFF FWD POWER forward power display only RFL POWER reflected power display only FREQUENC Y RF frequency display only AUD GAIN left and right audio gain display only VIEW parameter data browse menu see VIEW menu STATUS system running status see STATUS menu SET parameter setting menu see STATUS menu 9 2 4 Page of VIEW Figure 9 4 Page of VIEW Figure 9 4 shows the all parameters in the VIEW page In the VIEW page users can only browse the parameters If users want to modify the parameters it should to be enter the SET page FWD POWER RFL POWER FREQUENCY MODU DEV AUD GAIN AUDIO INPUT PRE EMPHASIS PILOT DEV AMP VOLTAGE DRV CURRENT AMP CURRENT A AMP CURRENT B AMP CURRENT C AMP CURRENT D TEMPERATURE BAUDRATE ADDRESS REMOTE DATE TIME PERIOD CTRL Forward power Reflected power RF frequency
12. automatically Worse if forward power is more than 110 of rated power voltage of power supply is higher than 55V driver current is higher than 1 4A at list one amplifier mode current is higher than 11A the unbalance current is more than 6 04 it will shut down at once If the voltage of power supply is less 47 5V the output power will play down and the fans will turn slowly to let system work better it will decrease RF power to get power back to 48V 10 8 Lamp for RF MUTE It means nothing for this mode of equipment 25 11 Failure Check 11 1 Turn on the power supply but the equipment doesn t work it may The fuse 1s broken change the fuse The plug is not inserted tightly or contacted fault insert the plug tightly 11 2 No audio output The source of audio signal is not connected check the wire to ensure it has been connected correctly Choose the wrong source of the signal please choose the correct source of signal digital or analog CONTACT Email rita fmuser net Web www fmuser net Phone 86 020 87597795 804 Mob 86 13580359764 MSN rita cai jxpxohotmail com Skype rita cai87 Address Room1502 Huilan Ge No 273 HuangPu Road West Tianhe District Guangzhou China 510620 26
13. host and can not be changed locally except Remote flag in SET menu Updated parameters will be automatically stored in EEPROM When remote is disabled remote host can not control over the exciter but locally does Updated parameters will be automatically stored in EEPROM RS232 or RS485 are used for remote control Before enabling remote control baud rate and device address should be properly set 8 3 Change RF Frequency After RF frequency changed RF power will drop to O first and then increase to its setting power 8 4 Time Period Modification It is suggested that disable Period Control before correcting date and time or changing period s start and end time to avoid instantaneous undesired RF power on and off 8 5 System Protection In some urgent cases such as exceeded forward power reflect power current and over temperature system will reboot If it is failed successive 3 times the system will automatically turns off RF power and just acts display function System will also shut down when some main parameter can not be set such as frequency digital analog audio select 9 Direction for Software Use 9 1 General Description 9 1 1 Buttons A Up or increase when pressed and held for a longer time it speeds up V Down or decrease when pressed and held for a longer time it speeds up O Enter used to select menu and enter edited parameter 9 1 2 Menu classification There are three kinds of menus display menu
14. ncy Synthesizing Cell Power Control Center and Power Amplifier Cell 1t is showed by Figure 3 1 The Power Supply changes the 220V AC to all kinds of DC for other parts of transmitter Main Control and Display Cell is an interface between users and the machine It puts all information about transmitter on the LCD and users can configure the transmitter via pressing the key buttons Audio Processing and Frequency Synthesizing Cell is the core of the transmitter This part does pilot stereo code pre emphasis and audio gain for inputting audio signal which can be analog or AES or SCA by using digital signal process technology and meanwhile it using direct digital synthesis technology to get frequency which users want Power Amplifier Cell contains Driver Power Distribute Amplifier Power Combiner Filter Power Monitor Power Control Center Controls output RF power at a value form Main Control and Display Cell according as sampling value of power voltage current temperature At the same time it sends sampling value to Main Control and Display Cell to display CZH Analog L ADC Input dE Processing DSP DDS Digital Filter Stereo Digital je AES EBU code Digital Input i Pre emphasis SCA Audio Gain Band pass Filter SCA Digital Signal direct digital synthesis Input mE Driver y Power Filter Micro Process MCU PAT sample Power Control EN 220V AC RF Input Output Figure 3
15. op Protected amplifier voltage is too high RF power is turned off DRV CURRENT Normal Warning Protect Normal amplifier driver current is normal Warning amplifier driver current 1s high may cause RF power drop Protected amplifier driver current 1s too high RF power is turned off AMP CURRENT A Normal Warning Protect Normal amplifier module A current is normal Warning amplifier module A current is high may cause RF power drop Protected amplifier module A current is too high RF power is turned off AMP CURRENT B Normal Warning Protect Normal amplifier module B current is normal Warning amplifier module B current is high may cause RF power drop Protected amplifier module B current is too high RF power is turned off AMP CURRENT C Normal Warning Protect Normal amplifier module C current is normal Warning amplifier module C current is high may cause RF power drop Protected amplifier module C current is too high RF power is turned off AMP CURRENT D Normal Warning Protect Normal amplifier module D current is normal Warning amplifier module D current is high may cause RF power drop Protected amplifier module D current is too high RF power is turned off CUR BALANCE Normal Warning Protect status of unbalance current between 4 amplifier modules Normal unbalance current is normal Warning unbalance current is big may cause RF power drop Protected unbalance current is too big RF p
16. ower is turned off TEMPERATURE Normal Warning Protect Normal temperature is normal Warning temperature is high may cause RF power drop Protected temperature is too high RF power is turned off EXIT return to its parent menu 9 2 6 PASSWORD CHECK Figure 9 6 Page of password check Check password before entering Set and Preset menu When Password Check is enabled Enter password in Password first and then select Sure If correct password is entered it will enter to desired menu Else it will display Wrong password try again Select Cancel to give up password enter and return to its previous menu The initial password is 000000 if need a new password refer to Password menu 9 2 7 SET Menu Figure 9 7 SET menu Audio bar is located on the left side of the screen it indicates dynamic modulation deviation 100 denotes 75KHz modulation Broadcast broadcast parameter setting see Broadcast menu 20 General system parameter setting see General menu RTC date time and period control setting menu see RTC menu Password change password menu see Password menu Preset load default parameters see Preset menu EXIT return to its parent menu 9 2 8 BROADCAST Menu Figure 9 8 Page of BROADCAST Menu FWD Power forward power display only used to watch real output power when adjusting output power percentage RFL Power forward power display only u
17. sed to watch real output power when adjusting output power percentage Power Set set the percentage of output power Frequency set RF frequency Modu Dev set modulation deviation Aud Gain L set left audio gain Aud Gain R set right audio gain Audio Input D Mono mono modulation audio from left digital channel 21 A Mono mono modulation audio from left analog channel D Ster stereo modulation audio from digital channel A Ster stereo modulation audio from analog channel Pre emphasis select pre emphasis Pilot Dev set pilot deviation EXIT return to its parent menu 9 2 9 GERNERAL Menu Figure 9 9 Page of GERNERAL Menu Baud Rate select baud rate for remote control Address set device address for remote control Remote enable or disable remote control EXIT return to its parent menu 9 2 10 RTC Menu Figure 9 10 Page of RTC Menu Date Set or display date Time set or display time Period Control Enable or disable period control ON Period 1 set first period ON Period2 set second period 22 ON Period3 set third period EXIT return to its parent menu 9 2 11 PRESET Menu Figure 9 11 Page of PRESET Menu Preset menu is used to load default parameters Make sure that some parameters may need to be adjusted after Preset according to your broadcasting requirement Select Sure to load default parameters Select cancel to return to Main menu Preset default parameters
18. the latest digital signal processing and the direct digital synthesized technology This advantage provides us with excellent hearing feature which can match to CD audio quality CZH618F 1000 500C digital FM broadcast transmitter runs with perfect performance Its technical specifications like THD Audio Frequency Response SNR Stereo Separation or other Technical Specifications are complete meet FM Transmitter s National Standard amp Industry Standard and as a new type of high tech Digital Product a lot of its Technical Specifications are better than National Standard amp Industry Standard CZH618F 1000 500C digital FM broadcast transmitter is composed of five parts Power Supply Main Control and Display Cell Audio Processing and Frequency Synthesizing Cell Power Control Center and Power Amplifier Cell It is fitted in the 3U 19 inches standard case All the output and input signal is lead from the back panel CZH618F 1000 500C series has password protected function to protect some important parameters from accidentally or incidentally changing CZH618F 1000 500C series transmitter has analog and AES EBU audio interface and SCA interface It is a full band FM transmitter from 87 00 108 00MHz step 10kHz CZH618F 1000 500C digital FM broadcast transmitter provides a serial communication interface in order to build a Remote System easily 2 Technical Specifications Electrical Specification y RF Frequency 87 00MHz 108 00MHz
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