User Manual for CZH618F-2000C 2KW FM Transmitter
Contents
1. 7 14 9 Indicator light 7 20 10 Failures Check 2 3 24 Fi Mm US Gr FMUSER INTERNATIONAL GROUP INC 0000000000000 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 Provide good ventilation This machine adopts the natural convective radiation Fix it correctly to keep it radiating well 5 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 6 If you have any other questions please connect with us rita fmuser net 4 24 Zw Fi m Us er FMUSER INTERNATI2. EXIT return to its parent menu 8 2 10 PRESET Menu Figure 8 10 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 Frequency 97 50 MHz 21 24 Fi m US er FMUSER INTERNATIONAL GROUP INC HH EH E E E U E E E E E U H Power Percentage 0 096 Audio Gain 0 dB Audio Input Digital audio stereo modulation Pre emphasize 90 us Modulating deviation 75 0 KHz Pilot deviation 7 5 KHz AGC enable Baud rate 9600 bps Address 0 Hemote OFF Period Control OFF Password 000000 3 2 11 PASSWORD Menu Figure 8 11 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 9 Indicator light At the left side of the front panel there are 8 LED lamps used to indicate all kind of system status Th
3. 8 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 8 2 Pages Description 8 2 1 System Boot Up 9 2 2 Setting parameter display Figure 8 2 The Page displaying setting parameters 15 24 Fmuser FMUSER INTERNATIONAL GROUP INC TU HH E H B EH E E E B E EE E H Frequency and Power set percent the most important setting parameters 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 3 2 3 Main menu page Figure 8 3 Main menu page Figure 8 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 HF SWITCH RF switch control select between ON or OFF FWD POWER forward power display only RFL POWER reflected power display only FREQUENCY 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 8 2 4 Page of VIEW 16 24 Fmuser FMUSER INTERNATIONAL GROUP INC TU B B EH E HL E HL E B
4. Connect the test instrument to transmitter according to Figure 5 3 b Record harmonic suppression relative to carrier lt 60dB 4 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 10 24 A E Mm US er FMUSER INTERNATIONAL GROUP INC OPOODOOOOOOOEE 5 Panel Description 5 1 Front Panel DIGITAL FM RADIO TRANSMITTER e WADED CA KAZ D DOG THAO PGT 1 LED Indicator ON power supply indicator RF RF power out STEREO stereo indicator REMOTE remote control is on TEMP temperature alarm VSWR VSWRiis high GENERAL PA Voltage or PA Current system alarm RF MUTE U inter lock in or excessive forward power or excessive reflect power 2 LCD display screen 3 Operation button UP up or increase ENTER enter DOWN down or decrease 4 Power switch 11 24 Fmuser FMUSER INTERNATIONAL GROUP INC 1 HH H B B BB HL E DT 5 2 Back Panel CD D CD 9 OG Back Panel function description 1 HF Output 2 Axial Fan for Rf power heat sink 3 Axial Fan for power supply 4 Left Analog Audio Input 5 Right Analog Audio Input 6 AES EBU Input optional 1 GNDI 2 positive 3 negative 7 COM RS232 PIN 2 TX PIN 3 RXJ PIN 5 GNDJ 1
5. E U H 3 2 7 SET Menu Figure 8 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 General System parameter setting see General menu Password change password menu see Password menu Preset load default parameters see Preset menu 8 2 6 BROADCAST Menu Figure 8 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 used to watch real output power when adjusting output power percentage 20 24 A Fmuser FMUSER INTERNATIONAL GROUP INC HH DB DB D H B U H HU U U U D 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 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 8 2 9 GERNERAL Menu Figure 8 9 Page of GERNERAL Menu Baud Rate select baud rate for remote control Address set device address for remote control Hemote enable or disable remote control
6. B U D Ll page FWD POWERQ 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 Figure 8 4 Page of VIEW Figure 8 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 Forward power Reflected power RF frequency 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 CTRL period control EXIT return to its parent menu 17 24 A Fmuser FMUSER INTERNATIONAL GROUP INC HH DB DB D H B U H HU U U U D 9 2 5 Page of STATUS Figure 8 5 Page of STATUS Two pictures in Figure 8 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 HF power is off Drop RF power can not achieve to its se
7. 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 7 24 Analog LL O gi tal Signal direct digital I nput Processi ng DSP synt hesi s DDS Hi gi tal d Filter Stereo code DO gi tal SCA Pre enphasi s Band pass Filter Input Audi o Gi ng Filter Sam e 22V AC Input Figure 3 1 CZH618F 2000C 2000W transmitter structure and function Fi m Us er FMUSER INTERNATIONAL GROUP INC 0000000000000 8 24 A E m Us er FMUSER INTERNATIONAL GROUP INC FU UOUUUUUOUUUUUOUOD 4 Test and Maintenance CZH618F 2000C Digital FM Transmitter is a high performance Transmitter its Technical opecifications 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 4 1 Performance Test CZH618F 2000C Digital FM Transmitter is the Compact product So it only needs One Time Testing of the Entire Machine if the te
8. 2 24 A Fi m US er FMUSER INTERNATIONAL GROUP INC TU 0000O00000000 8 AG Socket PIN1 LJ PIN2 GND PIN 3 NJ 9 Fuse Socket with 25A 10 RF Test Port 6 Power On Sequence 6 1 Open the package check appearance switch key button socket and interface port on front and back panels 6 2 Turn power switch on the OFF position and connect power cord to power source 6 3 Connect RF out port to a 50 Ohm dummy load or antenna through a cable 6 4 Turn power on 6 5 Set RF logical control see detail in System Logic Control 6 6 Set HF power 6 7 Set parameters such as frequency digital analog audio input select stereo mono select audio gain modulation deviation pre emphasis 6 8 Turn on RF power 7 System Control Logic 7 1 RF Output Control The RF output of CZH618F 2000C digital FM broadcast transmitter is controlled by switches RF Switch in main menu and period control switch in RTC menu HF Switch When RE 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 HF Switch is on and Period Control is enabled RF power is controlled by Period Control function see Period Control Period Control When HF 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
9. A E m US er FMUSER INTERNATIONAL GROUP INC FU UOUUUUUOUUUUGUUOD CZH618F 2000C 2KW Digital FM Broadcast Transmitter User s Manual DIGITAL FM RADIO TRANSMITTER E el FMUSER INTERNATIONAL GROUP ING http www fmuser net 1 24 Fi m US er FMUSER INTERNATIONAL GROUP INC HH EH E E E U E E E E E E H Please notice this Read safety notice first 2 A 500 dummy load power ratingz2KW or antenna and cable VSWR 31 30 must be connected before turning power on 3 Please read System Control Logic section to fully understand how the system works 4 Please read the Power On Sequence 2 24 A E Mm US Gr FMUSER INTERNATIONAL GROUP INC 1 1 HH B B BB HL E E E UB 1 LU Catalogue oafety Notice 1 OvervieW 5 2 Technical Specifications 6 3 System Structure and Function 7 MMMe 7 4 Test and Maintenance 10 5 Panel Function Description LLL 10 O POWEMOMOCQUGNCS E SN 13 7 System Control LOgiC 13 8 Description for software USe
10. MP 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 HF power drop Protected unbalance current is too big RF power 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 8 2 6 PASSWORD CHECK Figure 8 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 19 24 FMUSER INTERNATIONAL GROUP INC HH EH E E E U E E E E
11. ONAL GROUP INC TU 000000000000 1 Overview CZH618 digital FM broadcast transmitter combining with audio modulation and 1KW power amplifier is an excellent digital product that owns the highest and newest technology The whole machine adopts 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 CZH618 digital FM broadcast transmitter runs with perfect performance Its technical specifications like THD Audio Frequency Response SNR and Stereo Separation etc totally meet the national relevant standards and industry standards of FM transmitter At the same time as the brand new high tech digital products in a number of their technical specifications is much higher than the national standards and industry standards CZH618 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 4U 19 inches standard case All the output and input signal is lead from the back panel 240 64 liquid crystal as a display unit displayed page is clear CZH618 series has password protected function to protect some important parameters from accidentally or incidentally changing CZH618 digital FM broadcast transmitter provides a serial communication interface in order to build a Rem
12. ain 15dB 15dB step 0 1dB y Pre emphasis O s 50 s 75 s y Frequency Response O 0 1dB 30Hz 15000Hz y LR Channel Level Difference 0 1dB 100 Modulation y Stereo Separation 50dB type 30Hz 15000Hz y SNR H 70dB type tkHz 100 Modulation y Distortion measure 0 1 30Hz 15000Hz 100 modulation No heavier Not to heavy y Heat dissipation Forced ventilation y Power Supply AC88V AC264V 47Hz 63Hz 6 24 A E Mm US Gr FMUSER INTERNATIONAL GROUP INC 1 HH H B B BB HL E DT 2 3 Physical Specification Chassis standards 19 Inch Casing Size 4U 445Smmx170mmx700mm Weight 40kg 2kg Ambient temperature 5 40 C Relative Humidity 95 sea Level Height 4500m 3 System Structure and Function CZH618 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 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
13. han 45V driver current is higher than 2 2A at least one amplifier s current is higher than 18A and one amplifier has no current When the lamp is light and accompanied by a power decreases it shows that the reflection power is too big In a certain period of time reduce power still can not get out of this state the system will shut down and restart the amplifier If forward power exceeds 11096 of rated power the system will shut down the amplifier immediately and then restart it Users can enter STATUS page to check the alarm status of FWD POWER ADJ VOLTAGE AMP VOLTAGE DRV CURRENT AMP CURRENT A AMP CURRENT B 23 24 Fi m Us er FMUSER INTERNATIONAL GROUP INC 0000000000000 9 8 Lamp for RF MUTE It means nothing for this mode of equipment 10 Failure Check 10 1 Turn on the power supply but the equipment doesn t work it may The fuse is broken change the fuse The plug is not inserted tightly or contacted fault insert the plug tightly 10 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 10 3 Other Failure If there is any other problem that can not be solved please contact with Zhongchuan digital equipment Co Ltd 24 24
14. lay function oystem will also shut down when some main parameter can not be set such as frequency digital analog audio select 8 Direction for Software Use 8 1 General Description 3 1 1 Buttons UP Up or increase when pressed and held for a longer time it speeds up DOWN Down or decrease when pressed and held for a longer time it speeds up ENTER Enter used to select menu and enter edited parameter 14 24 A E Mm US Gr FMUSER INTERNATIONAL GROUP INC 1 1 HH B B BB HL E E E UO 1 LU 8 1 2 Menu classification There are three kinds of menus display menu 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 ENTER use UP or DOWN to change parameter and press ENTER 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 UP or DOWN to select Y confirm or N cancel and press ENTER to save updated parameter or cancel it Parameter can not be modified locally when remote is enabled except Remote itself 8 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
15. ote System easily CZH618 exciter has analog and AES EBU audio interface and SCA interface only two types are chose in three AUDIO INPUT LEVEL 12dBm to 8dBm Analog audio input impedance 600 AES EBU Digital audio input impedence110 T HTC function with which transmitter can be power on off on time are optional 5 24 Fi m US er FMUSER INTERNATIONAL GROUP INC HH EH E E E U E E E E E U H 2 Technical Specifications 2 1 Equipment performance meet the following standard GY T 169 2001 GB T 4312 1 1984 GB T 4312 2 1984 GB T 12572 2008 2 2 Electrical Specification y RF Frequency 8 00MHz 108 00MHz Step 10kHz y Output Power Continuous adjustable to setting power y Power Accuracy t1096 y Power stability lt 3 y Output Impedance 50 y RF Output connector L27 50K or L29 50K 7 16 or IF45 50K y SFDR lt 60dB y Residual Amplitude Modulation 50dB y Carrier Frequency accuracy 200Hz y Frequency Stability 1x10 y Modulation Deviation 0 120KHz 10096 75kHz y Pilot Frequency 19kHz 0 1Hz y Pilot Amplitude 0 12KHz 10 7 5K y Analog Audio Input Impedance 600 Balance y Digital Audio Input Impedance 110 Balance optional y Digital Audio Input Level 0 2 10Vpp optional y Digital Audio Sample Rate 3O0kHz 96kHz optional y SCA Input imbalance y SCA Connector BNC Type connector y SCA Modulation degree 7 5KHz 0dBm y SCA Centre frequency 67KHz y SCA frequency deviation 4KHz y Audio g
16. power Else turn off RF power period is invalid if start time is 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 13 24 Fi m US er FMUSER INTERNATIONAL GROUP INC HH EH EH E E U E E E E E U H 7 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 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 7 3 Change RF Frequency After RF frequency changed RF power will drop to 0 first and then increase to its setting power 7 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 7 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 disp
17. ree 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 9 1 Lamp for Power on When it is power on the voltage of 5V is supplied normally this green lamp is luminous 22 24 A E Mm US Gr FMUSER INTERNATIONAL GROUP INC 1 HH H B B BB HL E DT 9 2 Lamp for RF When the RF SWITCH in the main menu is set to ON and the POWER SET percent is more than 0 this green lamp is light 9 3 Lamp for AUDIO If the audio input mode is set to be the stereo the lamp is light 9 4 Lamp for REMOTE In the page of General Set if Remote is enabled this yellow light is illuminant 9 5 Lamp for TEMP When the amplifier temperature is higher than 60 C the red lamp is light if temperature exceeds 65 Cit will power off automatically Users can enter STATUS page to view TEMPERATURE alarm status 9 6 Lamp for VSWR If reflected power is higher than 5 of rated power the lamp is light if it is higher than 8 of power it will decrease output power to decrease reflected power when it is higher than 1096 of power it may happen that the software power off the output or the hardware circuit switch off the power supply then power on again 9 7 Lamp for GENERAL If this lamp is light it may happen that forward power is more than 105 of rated power voltage of power supply is higher than 53V or lower t
18. sting report doesn t meet its technical specifications by the same accuracy instrument please repair it in professional department or original manufacturer 4 1 1 Audio Performance Test FM Denodul at Transmtt Ar V t C net er Figure 4 1 connecting for audio analyze a Connect transmitter and test Instrument with cable according Figure 4 1 b Make audio analyzer output 400Hz 0dBm c Finely adjust audio output level until demodulation reaches 75KHz 100 modulated d Scan audio output frequency from 30Hz to 15kHz record frequency response 0 1dB and distortion 0 196 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 50 s demodulator to 50 s de emphasis adjust audio analyzer power output until demodulation reaches 75KHz record mono SNR 575dB and stereo SNR gt 700dB 9 24 Fi m US er FMUSER INTERNATIONAL GROUP INC HH EH E E E U E E E E E E H 4 1 2 Carrier Frequency Accuracy Test Transmitter Vat t nat er Att enuat or Uni versal Count er Figure 4 2 connecting for carrier frequency test a Connect the test instrument to transmitter according to Figure 5 2 D The test carrier frequency accuracy 200HZ 4 1 3 Harmonic Suppression Dumm Spectrum Transmitter Wattmeter 7 Attenuator p Load Analyzel Figure 4 3 connecting for spectrum analyzer a
19. tting 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 is 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 is high may cause HF power drop 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 is high may cause HF power drop Protected amplifier driver current is too high RF power is turned off AMP CURRENT A Normal Warning Protect Normal amplifier module A current is normal 18 24 A E m Us Gr FMUSER INTERNATIONAL GROUP INC 1 1 HH B B BB HL E E E UB 1 LU 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 A
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