ZHC618F-300W User`s Manual
Contents
1. H FM Demodulation FMAB 100KHz 5 6GHz Audio Analyzer PIDD Analog and digital Audio Precision Digital 3 TEK2260 200MHz Tektronix Oscilloscope 5 Test and Maintenance As a high performance FM exciter designed with digital technology for example software modulation pre emphasis digital frequency synthesis the unity of some technical specifications are guaranteed To test its technical specification higher performance instruments must be used If test result 1s below applied standard please send it to professional maintenance department or the producer y Audio Performance Test Test Instrument Digital Power Exciter Attenuator Figure 1 a Connect test instrument to exciter according to Figure 1 b Make audio analyzer output 400Hz 0dBm c Finely adjust audio output level until demodulation reaches 75K Hz 10096 modulated d Scan audio output frequency from 30Hz to 15kHz record frequency response lt 0 1dB and distortion lt 0 1 d Scan audio output frequency from 30Hz to 15kHz record stereo separation typical gt 50dB f Set audio analyzer to IKHz exciter pre emphasis to 50us demodulator to 50us de emphasis adjust audio analyzer power output until demodulation reaches 75KHz record mono SNR gt 75dB and stereo SNR gt 70dB y Carrier Frequency Accuracy Test Digital Power Power Universal Exciter meter Attenuator Counter Figure 2 a Connect the test instrument to exciter2. 1 GND 2 positive 3 negative 90 Left Analog Audio Input 1 GND 2 positive 3 negative a dO 10 ll 12 Right Analog Audio Input 1 GND 2 positive 3 negative RF Test Port RS485 PIN 2 A PIN 3 B PIN 5 GND Interlock out Interlock in sis 8 Power On Sequence 8 1 8 2 8 3 8 4 8 5 8 6 8 7 8 8 8 9 Open the package check appearance switch key button sockets and interface ports on front and rear panels Turn power switch on the OFF position and connect power cord to power source Connect RF out port to a 50 Ohm dummy load or antenna through a cable If it is used in synchronous broadcast network ensure that 24 32MHz and 327 68MHz external synchronous clock should be connected Turn power on Set RF logical control see detail in System Logic Control Set RF power Set parameters such as frequency digital analog audio input select stereo mono select audio gain modulation deviation pre emphasis Turn on RF power 14 9 System Control Logic RF output control RF output is controlled by three switches interlock in called INTERLOCK RF Switch in main menu and period control switch in RTC menu Interlock in when exciter received an interlock in signal logic low signal it turns RF power off immediately in any circumstance RF Switch when RF Switch is off turn off RF power When RF Switch is on and Per
3. 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 EXIT if do not want change password The initial password if 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 PASSWORD CHECK Menu Check password before entering Set and Preset menu When Password Checkl 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 11 Failure Check 11 1 Turn on the power supply if 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 Synchronous clock source is not connected check the wire to ensure it has been connected the clock source correctly only used in the synchronous cover network 11 2 No audio output The source of audio signal is not connected check the wire to ensure
4. it has been connected correctly Choose the wrong source of the signal please choose the correct source of signal digital or analog If there is any other problem that can not be solved please contact with us 96
5. Digital FM Broadcast Exciter User s Manual Please notice this 1 Read Safety notice first 2 A 502 dummy load or antenna and cable must be connected before turning power on Avoid water going into connecters and cable 3 Please read System Control Logic section to fully understand how the system works 4 Please read Power On Sequence Contents DALY OC O aped CG CDU OO 4 NOI c 5 gt Technical sSpectitieat LODS eenias yN tta ER EINE iR PU ERU PASSAT 6 A MEST IDSEEUTHO FO ot natn eade teas wie FF FN nM FAR 7 3 Test And NMIAmHItGDance iw GU YR Gw dte ie ende as 8 O Functional Block Diagram YY Y cece ence du 10 7 Panel Function DescriptiOn LL YL FL i 11 S Fower BIET lU PE rneer EREET TT 14 9 System C ontrol LOIC arseen NNi 15 I0 Directon For Software USC cc ea Y da ssr npe 17 WD Faures Eu GRE rere cedere r 26 1 Safety Notice 1 1 Please read the following safety points in order to avoid the accidents and prevent the connecting machines to be broken 1 2 Only the qualified maintenance workers can operate the service ik uuu an ue IN 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 machin
6. according to Figure 2 b The test carrier frequency accuracy 200HZz y Harmonic Suppression Digital Power Power Spectrum Exciter meter Attenuator Analyzer Figure 3 a Connect the text instrument to exciter according to Figure 3 b Record harmonic suppression relative to carrier 60dB Functional Block Diagram DSP Digital Filter Digital Delayer Pilot generate Stereo Code Digital _ AES EBU Pre emphasis etc Interface i Band Pass Filter gt Level Adj amp Amplify Output LCD RS485 232 Interface Interface 10 7 Panel Function Description 7 1 10W 30W 50W 100W Front panel Figure 5 1 LED Indicator ON power supply indicator R F RF power out AUDIO stereo indicator REMOTE remote control is on TEMP temperature alarm V S W R VSWR is high GENERAL PA Voltage or PA Current alarm RF MUTE inter lock in or excessive forward power or excessive reflect power 2 LCD display screen 3 Operation button A up or increase O enter W down or decrease 4 _ Power switch 11 7 3 10W 30W 50W 100W Back panel Figure 6 AC Socket with 5A Fuse 2 Ground pole 3 RS232 PIN 2 TX PIN 3 RX PIN 5 GND 4 Fan 5 RF Output 6 SCA input optional or 327 68MHz Clock Input External Synchronization 7 24 32MHz Clock Input External Synchronization AES EBU Input optional
7. al channel D Ster LR stereo modulation audio from digital channel A Mono L mono modulation audio from left analog channel A Mono R mono modulation audio from right analog channel A Ster LR stereo modulation audio from analog channel select pre emphasis set pilot deviation return to its parent menu 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 RTC Menu Date Set or display date Time set or display time Period Control enable or disable period control ON Periodl set first period ON Period2 set second period ON Period3 set third period EXIT return to its parent menu gt 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 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 Delay time 0 us only in synchronous exciter AGC enable Baud rate 9600 bps Address 0 Remote OFF Period Control OFF Password 000000 gt PASSWORD Menu 24
8. e adopts the natural convective radiation Fix it correctly to keep it radiating well o mdp oc e i O Me M ee 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 5 If you have any other questions please connect with us 2 Overview ZHCOISF D series digital FM broadcast exciter 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 ZHCO618F D series digital FM broadcast exciter is composed of six parts main control and display audio interface digital signal processing power amplifier remote control and power supply It is fitted in the 2U 19 inches standard case All the output and input signal 1s lead from the back panel ZHCOISF D series has password protected function to protect some important parameters from accidentally or incidentally changing It also provide with LOCK IN LOCK OUT and remote control functions ZHCO618F D exciter has analog and AES EBU audio interface and SCA interface It is a full band FM exciter from 87 00 108 00MHz step 10kHz ZHCO618F D series digital FM broadcast exciter has two frequency synchronous
9. ev modulation deviation Aud Gain audio gain Aud input audio input and modulation mode see Set menu Pre emphasis pre emphasis Pilot Dev pilot deviation 9 Amp Voltage power voltage of amplifier Current current of amplifier Temperature temperature of amplifier Baudrate baud rate used for remote control Addr device address used for remote control Remote remote control switch Date date Time time Period Control period control EXIT return to its parent menu 10 5 Status Menu RF output 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 indicate system errors Contact equipment provider when error happens Lockin refer to system control logic section Unlocked system is not locked Locked system is locked by external device RF power is off Fwd Power 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 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 Current Normal amplifier current is normal Warning amplifier current is high may cause RF power drop Protected amplifier current is too high RF power is turned off Amp Voltage device address used for remo
10. iod 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 Control function see Period Control Period Control when interlock in is logic high or float 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 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 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 15 Change RF frequency After RF frequency changed RF power will drop to O first and then increase to its setting power Time Period Modification It is suggested that d
11. isable Period Control before correcting date and time or changing period s start and end time to avoid instantaneous undesired RF power on and off System Protection In some urgent cases such as exceeded forward power reflect power current and over temperature system will reboot If it 1s failed successive 5 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 6 10 Direction For Software Use 10 1 General description Buttons Ave 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 0 enter used to select menu and enter edited parameter 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 use A or V to change parameter and press 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 e to save updated parameter or cancel it Para
12. meter can not be modified locally when remote is enabled except Remote Itself 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 LCD backlight LCD backlight will be automatically turned off when there 1s no operation for a long time and turned on immediately when any key is pressed ads 10 2 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 its main menu 10 3 Main Menu Audio bar is located on the left side of the screen it indicates dynamic modulation deviation 10090 denotes 75KHz modulation RF Switch RF switch select ON or OFF FWD Power forward power display only RFL Power reflect power display only Freguency RF freguency display only 18 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 Set menu 10 4 View Menu di lt muy um aT au al ru b ai g T j Br iz ad uu a 1 e un y E a T ee 4 os d All items in View menu are display only FWD Power forward power RFL Power reflect power Frequency RF frequency Modu D
13. port with which a synchronous FM broadcasting network can be built 3 Technical Specifications Electrical Specification y y Mr Mr MP MEM ME ME WU lt m XXI lt lt MM RF Frequency Output Power Power stability Output Impedance RF Output connector SFDR Residual Amplitude Modulation Carrier Frequency accuracy Frequency Stability Modulation Deviation Pilot Frequency Pilot Amplitude Analog Audio Input Impedance Audio Input Level Digital Audio Input Impedance Digital Audio Input Level Digital Audio Sample Rate Audio gain Pre emphasis LR Channel Level Difference Frequency Response THD Stereo Separation SNR Power Supply Heat dissipation 87 00MHz 108 00MHz Step 10kHz Continuous adjustable to setting power Power Accuracy lt 10 3906 50 N 50K lt 70dB lt 50dB 200Hz 1x10 0 120KHz 100 75kHz 19kHz 0 1Hz 0 12KHz 10 7 5K 60092 Balance 12dBm 8dBm Step 0 1dBm 11092 Balance optional 0 2 10Vpp optional 30kHz 96kHz optional 15dB 15dB step 0 1dB Ous 50ps 75us lt 0 1dB 10096 Modulation lt 0 1dB 30Hz 15000Hz lt 0 1 30Hz 15000Hz gt 50dB type 30Hz 15000Hz gt 70dB type IKHz 100 Modulation Ll ACI80V AC260 47Hz 63Hz Forced ventilation Physical Specification y Casing Size 2U l9Inch y Weight 18kg y Ambient temperature 5 C 440 C y Relative Humidity lt 95 y Altitude lt 4500m 4 Test Instrument Spectrum Analyzer 8560E 30Hz 2 9GHz
14. te control Normal amplifier voltage is normal Warning amplifier voltage 1s high may cause RF power drop Protected amplifier voltage is too high RF power is turned off Temperature remote control switch Normal temperature is normal Warning temperature is high may cause RF power drop Protected temperature is too high RF power is turned off 10 6 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 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 oO x BROADCAST Menu FWD Power REL Power Power Set Frequency Modu Dev Aud Gain L Aud Gain R Audio Input Pre emphasis Pilot Dev EXIT forward power display only used to watch real output power when adjusting output power percentage forward power display only used to watch real output power when adjusting output power percentage set the percentage of output power set RF frequency set modulation deviation set left audio gain set right audio gain D Mono L mono modulation audio from left digital channel D Mono R mono modulation audio from right digit
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