CZH CZH-15A User manual

Contact:lanyue Email:
[email protected]
Website: www.czhfmtransmitter.com
Skype: lanyue9999
CZH-15A 15W
FM Transmitter
Manual

This product uses a new generation of Japanese ROHM's chip
FM stereo radio emission (BH1415F) Seiko-produced. This
machine looks beautiful, with gold-plated aluminum chassis fully
closed, compact structure, shielding is good, solid firm, due to
BH1415F integrates PLL frequency PLL, audio pre-emphasis,
limiter and low pass filter circuit, the transmission frequency
stability, quality class, a high degree of stereo separation
performance than the other forums using ROHM's predecessor
(BA1404) produced a more superior transmitter. Very suitable for
the various tertiary institutions, living quarters, towns and villages
and the need to launch high-power high-fidelity audio signals to
suit the occasion.
The machine operation simple and easy wiring. Firing
frequency of the front panel display using LCD screen, step to
100Khz, through the bottom of the "+" and "-" two touch switches
to regulate the frequency of upward and downward, fast and
intuitive. "Audio" as the standard 3.5mm stereo input jack, you can
easily connect to most home stereo audio playback device. Back
on the "DC12V" power input socket, through the external 12V/5A
(optional larger current margin of) power adapter input (jack inside
the cathode), power adapter, switching power supply
recommended , such as notebook computers and LCD monitors

and other external switching power adapter, connector terminal
with a magnetic ring filter is best, so can greatly reduce the power
of the transmitter interference, conditional use 12V power supply
to the battery of the transmitter .
Machine parameters
Operating Voltage: DC 10V ~ 14V, recommend the use of 12V;
Operating current: <5A;
Transmission frequency: 88 ~ 108MHz
Transmit Power:> 15W
Modulation Mode: FM
Frequency Offset: + /-75KHz
Output Impedance: 50 Europe
Harmonic radiation: <-55dbc
Pre-emphasis delay: 50us;;
Separation: 40dB;
Input Level:-13dBV;
Applicable to the microphone: Electret condenser microphone

Operation instructions
1.Operation steps: installing an antenna---->>> to connect the
power ---->>>to connect audio source---->>> to connect the
microphone
2.Press the power button to boot into normal working condition.
AS the step of the bottom:
In the back of the transmitter, the antenna interface (ANT) as a
BNC interface, therefore, the antenna interface should also be as
BNC. External power adapter output voltage DC10 ~ 14V should
be within the range of maximum output current should be in 4A
above. As shown, the power adapter DC plug connected to the
transmitter back "DC12V" on top of the power socket (Note the
polarity is correct, he is outside the negative)

As shown above, for connecting external sound source audio
lines connected to "AUDIO" interface. Should use more cable
shielding performance audio cable, 3.5mm plug.
Connect the microphone
Connected to the "MIC" jack. And audio cable, like a good
selection of shielding wires, plugs for 3.5mm. (Note: The
microphone for the microphone type is Electret condenser
microphone.
Boot
After all the preparation work was ready, the power adapter
open, the transmitter is in standby mode the screen displays
"OFF":
Click on the front panel , The transmitter will enter the
normal working state, and then, through the "+" or "-" It's two

buttons to adjust the working frequency of the machine required
frequency.
Special features of the setting
1. Attention
(1)Before booting, be sure to had connect the antenna. It is
strictly prohibited empty boot.
(2) Audio cable must use shielded cable.
(3)The power adapter output DC voltage is selected as clean,
so as not to interfere with the transmitter.
(4) Avoid extreme hot or humid environment.
2. General troubleshooting.
A.The frequency can not be adjusted.
Reason: to set the frequency range may be errors,
high-frequency than low-end high frequency.
Solution: re-setting the relevant parameters (see
instructions)
B. To open the boot method, press the power button, the flash
look, LCD displays "OFF"
Reasons: low-voltage, over-power adapter with a lower
load capacity.
Solution: replace the power adapter (12V/4A)
C. Sound distortion serious
Cause: The input audio amplitude is too large.
Workaround: down the volume of the sound source.