CZH-5C/7C
Contents
1. FM Transmitter CZH 5C 7C User Manual Important NOUR WNP Maintenance can only be operated by authorized professionals Get lightening protection measures ready in thunderstorm weather Do not touch the antenna when the transmitter is powered on Do not power on the transmitter if the antenna is not well connected Do not use the transmitter under the explosive environment such as gas refueling station etc Do not use the transmitter in the extreme dusty damp or high temperature environment Be sure to comply with the rules released by the local radio administrations Audio Volume Knob Audio In Fower button MIC In MIC Volume Karak The front control panel Introduction E The product crust is made of high quality aluminum which also is the heating panel of power amplifier RDO6HVF1 with blue backlight LCD to display five digits of frequency E The motherboard is applied with chip BH1415F which is the new generation integrated NC FM stereo radio chip by ROHM built in PLL frequency audio pre emphasis limiter and low pass filter circuit Make sound more sweet E The control board is designed with high performance MCU STC series its performance is better than AT89C2051 E With microphone and audio input of the amplifier adjustable input level Transmitting power can switch between 1W and 6W 7W M Good shielding compact structure small size generous appearance E Notes Inner circuit board version2. L then press power button to confirm 2 LCD displays upper frequency it should display 108MHz in normal status The frequency can be adjusted by or button and press button to confirm Please note upper frequency that can be set is 108MHz 3 Then LCD displays low limit frequency it should display 76 87 00MHz in normal status The frequency can be adjusted by or button and press button to confirm Please note the lowest limit frequency that can be set is 76MHz 4 Press the power button to confirm until LCD displays OFF 5 Then press the power button to power on the transmitter it should in working status How to connect 2 separate inputs to this transmitter 1 The transmitter has two audio input interfaces one on the left marked as Audio and the other on the right marked as MIC Generally speaking the left is connected with audio input such as CD player Line in of the computer sound card 2 Certainly you can connect to two audio equipments such as the left is connected to the output of the sound card and the right is connected to MIC therefore you can hear two inputs on the receiver 3 However if you have a Mixer mix them first then connect to Audio interface is recommended 4 In addition note that MIC port only support electret condenser microphone but not moving coil microphone 4 How to transmit farther 1 As the transmission range depends on many factors the true distance is based on not only th
3. e transmitter power and its performances but also on the sensitivity of the receiver antenna of the receiver buildings and other obstructions which between the transmitter and the receiver 2 The distance will much farther in barrier free environment such as open countryside Therefore it is not scientific simple to say how far it transmits The transmission range may differ greatly with the Revised by BG7CR on Nov 1 2012 Any question please send email to littleshirely gmail com Please visit our website http www 108MHz com for more products FM Transmitter CZH 5C 7C User Manual same transmitter in different surroundings 3 If you want to get a farther range what you focus on is to buy a high quality antenna and try to set it higher Technical Specification Power supply DC9 15V 12V recommended Operating current Less than 2A Frequency range 87 108 MHz Frequency step 100 kHz Frequency stabilization method PLL Frequency stability 10ppm 10 C to 60 C Frequency deviation Less than 75 kHz 100 Working method Continuous Clutter and Harmonic Less than 60dB SNR More than 60dB Stereo channels crosstalk 50dB Audio frequency response 20 to 15000Hz Audio distortion Less than 2 Modulation 15 Input level 15dBV adjustable RF output impedance 50 Ohm RF output power 1W 6W 7W can be switched Reference range 5 10Km barrier free Unit dimension 160mm 95mm 54mm Facts a
4. may vary or slightly modifications Revised by BG7CR on Nov 1 2012 Any question please send email to littleshirely gmail com Please visit our website http www 108MHz com for more products FM Transmitter CZH 5C 7C User Manual Operation Instructions 1 2 3 How to set up 1 Connect the rubber antenna to the ANT interface 2 Connect your audio source to the Audio interface via audio cables 3 Connect the power supply to the Power interface Attention please note recommended operating voltage is 12V the polarity of the tip is inner positive and outer negative 4 Turn on the transmitter by pressing down power button to prepare broadcasting 5 Select an unused FM station in your area The station can be totally static or with some bleed over on it The Stereo FM Transmitter should have no problem walking over a radio station s bleed over yy 6 Set the Stereo FM Transmitter to that unused FM station you can use the control panel button or to adjust frequency the stepped frequency is 100KHZ 7 Set the frequency of your FM Radio to the same frequency which the transmitter is broadcasting on 8 Listen and Enjoy it s so easy How to switch power between1W and 6W 7W 1 Hold the power button and plug in the power adapter then release the power button LCD displays L or H H represents 6W 7W and L represents 1W Press or button to switch power to H or
5. mp Tips The FM Transmitter will not drift between stations because of our advanced stereo PLL Digital Tuner Technology The FM Transmitter use the control panel buttons to control the frequency that it broadcasts on so if the power is lost and then restored it will begin broadcasting back on that exact same frequency This avoids any need to reset the FM Transmitter back to the frequency you originally wanted We use a switch to turn the transmitter on and off This allows the transmitter to automatically turn back if power were to be lost and then restored The FM Transmitter is designed to operate non stop 24 7 The higher you place the antenna the farther you will transmit If you can match a good antenna to the FM transmitter the effect will be better The end Revised by BG7CR on Nov 1 2012 Any question please send email to littleshirely gmail com Please visit our website http www 108MHz com for more products
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