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GUANG ZHOU HAN TING INFORMATION TECHNOLOGY CO.LTD WWW.FMUSER.NET

USER’S MANUAL FOR CZH618F-1000/500C TRANSMITTER

ADC

AES/EBU

Digital Signal

Processing (DSP)

（

Digital Filter, Stereo

code, Digital

Pre-emphasis

Audio Gain

）

direct digital synthesis

（

DDS

）

Band-pass Filter

Driver

Power

Amplifier

Filter

Power Supply

Micro Process

（

MCU

）

LCD

Display

Com

Interface

SCA

Analog L

Input R

Digital

Input

SCA

Input

Figure 3-1 CZH618F-1000C transmitter

structure and function

Power Monitor

Output

Key

Buttons

Power Filter,

Sample,

Power Control

220V AC

Input

Содержание CZH618F-1000C

Страница 1: ...GUANG ZHOU HAN TING INFORMATION TECHNOLOGY CO LTD WWW FMUSER NET USER S MANUAL FOR CZH618F 1000 500C TRANSMITTER 1 CZH618F 1000C 1KW Digital FM Broadcast Transmitter User s Manual...

Страница 2: ...0 500C TRANSMITTER 2 Please notice this 1 Read safety notice first 2 A 50 dummy load power rating 1KW or antenna and cable VSWR 1 30 must be connected before turning power on 3 Please read System Cont...

Страница 3: ...ER 3 Catalogue Safety Notice 1 Overview 5 2 Technical Specifications 6 3 System Structure and Function 7 4 Testing Equipment 9 5 Test and Maintenance 9 6 Panel Function Description 10 7 Power on Seque...

Страница 4: ...hether 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...

Страница 5: ...mber 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...

Страница 6: ...lity 1x10 6 Modulation Deviation 0 120KHz 100 75kHz Pilot Frequency 19kHz 0 1Hz Pilot Amplitude 0 12KHz 10 7 5K Analog Audio Input Impedance 600 Balance Audio Input Level 12dBm 8dBm Step 0 1dBm Digita...

Страница 7: ...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...

Страница 8: ...er Stereo code Digital Pre emphasis Audio Gain direct digital synthesis DDS Band pass Filter Driver Power Amplifier Filter Power Supply Micro Process MCU LCD Display Com Interface SCA Analog L Input R...

Страница 9: ...est instrument for CZH618F 1000C transmitter 5 Test and Maintenance CZH618F 1000C Digital FM Transmitter is a high performance Transmitter its Technical Specifications are complete meet FM Transmitter...

Страница 10: ...put frequency from 30Hz to 15kHz record stereo separation typical 50dB f Set audio analyzer to 1kHz exciter pre emphasis to 50 s demodulator to 50 s de emphasis adjust audio analyzer power output unti...

Страница 11: ...rrier 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 exampl...

Страница 12: ...REMOTE remote control is on TEMP temperature alarm VSWR VSWR is high GENERAL PA Voltage or PA Current system alarm RF MUTE inter lock in or excessive forward power or excessive reflect power 2 LCD dis...

Страница 13: ...n for Rf power heat sink 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 co...

Страница 14: ...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 i...

Страница 15: ...uttons 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 edite...

Страница 16: ...is pressed 9 2 Pages Description 9 2 1 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 t...

Страница 17: ...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 displ...

Страница 18: ...frequency MODU DEV modulation deviation AUD GAIN audio gain AUDIO INPUT audio input and modulation mode see Set menu PRE EMPHASIS pre emphasis PILOT DEV pilot deviation AMP VOLTAGE amplifier voltage...

Страница 19: ...ower 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...

Страница 20: ...igh 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 m...

Страница 21: ...y 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 ba...

Страница 22: ...tput 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 se...

Страница 23: ...urn to its parent menu 9 2 10 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 t...

Страница 24: ...st 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 wh...

Страница 25: ...of power it will decrease output power to decrease reflected power when it is higher than 100W it may happen that the software power off the output or the hardware circuit switch off the power supply...

Страница 26: ...may The fuse is 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 en...

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