CZH CZH-05B User manual
CZH®
CZH-05B FM Transmitter
Instruction Manual
Before use, please read it carefully and properly keep
CZH-05B FM Transmitter Instruction Manual
CAUTION:
Never operate the transmitter without connecting a suitable antenna or dummy 50Ohm
load to the output otherwise there is a serious danger of destruction of the output stage of
the transmitter.
Copyright of
This manual CopyRight owned by the company, all rights reserved. The manual without permission of
the company, not in any form or method to copy, transmit, copy, or translated into any language or
computer language.
FCC Information
Thi
s
de
v
i
c
e
c
om
pl
i
es
with
part 15
of
the FCC Rules.
O
pe
r
a
t
i
on
i
s
s
ub
j
e
c
t to
the
following two
c
ondi
t
i
ons
: (1)
this
de
v
i
c
e
may not cause ha
r
m
f
ul
i
nt
e
r
f
e
r
e
nc
e
and
(2)
this
de
v
i
c
e
must accept any
i
nt
e
r
f
e
r
e
nc
e
r
e
c
e
i
v
e
d,
i
nc
l
udi
ng
i
nt
e
r
f
e
r
e
nc
e
that
may cause
unde
s
i
r
e
d
ope
r
a
t
i
on.
O
pe
r
a
t
i
on
of
this equipment
in
a
r
es
i
de
n
t
i
a
l
area
i
s
likely to
cause
i
nt
e
r
f
e
r
e
nc
e
in which
case the
user at his
or
her
own r
i
s
k
and expense
will
be required
to
correct the
i
nt
e
r
f
e
r
e
nc
e
.
D
e
c
l
a
r
a
t
i
on
of Conformity
,
de
c
l
a
r
es
that the
POD-FM conforms
to the following
standards,
in
accordance
with
the
prov
i
s
i
ons
of
the EC
D
i
r
e
c
t
i
v
e
89/366/EEC:
EN
55022
(
C
I
SP
R
22:1985),
C
l
ass
A
.
Warranty
warrants
that
this product
will be
f
r
ee
from
de
f
e
c
t
s
in
m
a
t
e
r
i
a
l
s
and workmanship
for
pe
r
i
od
of
t
i
m
e
s
pe
c
i
f
i
e
d
on the
product packaging.
Thi
s
li
m
i
t
e
d
warranty
s
ha
ll
commence
from the
date
of
purchase.
warranty
i
s
not tr
a
ns
f
e
r
a
bl
e
and
i
s
li
m
i
t
e
d
to
the
or
i
gi
na
l
purchaser.
If
the product
i
s
f
ound
to
be de
f
e
c
t
i
v
e
then, as
your
sole remedy and as
the
manufacturer's
only
obl
i
ga
t
i
on,
will
r
e
pa
i
r or
replace
the
product
. Thi
s
warranty
s
ha
ll
not
apply
to
products
that
have been
s
ub
j
e
c
t
e
d
to
abuse,
m
i
s
us
e
,
a
bnorm
a
l
e
l
e
c
tr
i
c
a
l
or
e
n
v
i
r
onm
e
nt
a
l
c
ondi
t
i
ons
,
norm
a
l
wear and
tear
or
any c
ondi
t
i
on
other than what can be c
ons
i
de
r
e
d
norm
a
l
us
e
.
Limitation of Liability
The
li
a
bi
li
ty of
a
r
i
s
i
ng
from
this warranty and
sa
l
e
s
ha
ll
be
li
m
i
t
e
d
to
a
r
e
f
und
of
the
pur
c
ha
se
pr
i
c
e
.
In
no event
s
ha
ll
be
li
a
bl
e
for
costs
of
procurement
of
s
ubs
t
i
t
u
t
e
products
or
se
rv
i
c
es
,
or
f
or
any
lost
pr
of
i
t
s
,
or for
any c
ons
e
quen
t
i
a
l
,
i
nc
i
de
n
t
a
l
,
direct
or
i
ndi
r
e
c
t
damages, however caused
and
on
any theory
of
li
a
bi
li
ty
,
a
r
i
s
i
ng
from
this warranty and
sa
l
e
.
These
li
m
i
t
a
t
i
ons
s
ha
ll
apply not
with
standing any
f
a
il
ur
e
of
esse
n
t
i
a
l
purpose
of
any
li
m
i
t
e
d
r
e
m
e
dy
.
Contents
I
n
tr
oduc
i
ng
the
FMTr
a
ns
m
i
tt
e
r
T
e
c
hni
c
a
l
target
Package Contents
About CZH
Products and
S
e
rv
i
c
es
Hardware
B
as
i
c
s
I
ns
t
a
ll
a
t
i
on
Instruction
U
s
i
ng
the
FM Tr
a
ns
m
i
tt
e
r
A
d
j
us
t
m
e
nt
of
Radio Frequency
C
ha
nne
l
s
Power
On/Off
I
mpor
t
a
nt
N
ot
i
c
e
Tr
oubl
es
hoot
i
ng
S
e
tt
i
ng
and
a
d
j
us
t
m
e
nt
of
s
pe
c
i
a
l
f
unc
t
i
ons
(
Out
Power and Freq. set)
Appendix
CZH-05B FM Transmitter Instruction Manual
Introducing the CZH FM Transmitter
Thank you for purchasing our transmitter, This stereo FM transmitter can easily build a wonderful
FM radio station. This one have a beautiful aluminum alloy cover.
We presents a brand new 500mW PLL FM Stereo Transmitter for FM stereo broadcasting. built in
LCD display with blue backlight,Built in microcontroller for frequency control and display. Built in FM
stereo transmitter IC with PLL technology,surface-mount tech, reliable working condition. the
transmission frequency is highly stable. Compact design with aluminum enclosure.
transmission distance more than 300 meters (In the line of
sight
，
field,
open land). This
transmitter is ideal for all stereo audio broadcasting, MP3, PC, TV, wireless speakers, game device,
etc.
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.
Complete easy to follow plug & play instructions are included plus tips on getting the best distance
possible.
If you can match a good antenna to the FM transmitter, the effect will be better. The transmission
range depends on many factors. The true distance is based on the sensitivity of the receiver,
antenna of the receiver, and the building and other obstructions, which are between the transmitter
and receiver. And the distance will much more in countryside.
Package Contents
•1xCZH-05FM Transmitter
•1x100~240VPower Supply
• 1x 3.5mm Audio Cable
• 1x Rubber Antenna
Technical target
Power Output:
500mW ±20% (12V DC)
FM Transmitter Frequencies:
87-108Mhz (78-108Mhz 2010 V1.2 version)
Tuning Step:
100Khz/0.1Mhz
Power Supply:
9-12V DC (The current load of power supply should over 1A)
Stability of Frequency:
±0ppm
（
-10
℃
~+50
℃
）
Frequency Response:
100 - 15000Hz
P
r
e
-
e
m
pha
s
i
s
:
50us
type
of
modul
a
t
i
on
:
W
F
M
Tuning Design:
Stable PLL Technology
Transmission Signal:
FM Stereo
maximum
f
r
e
quenc
y
de
v
i
a
t
i
on
:
±75KHz
Signal to Noise Ratio:
>60dB
pa
r
a
s
i
t
i
c
a
m
pl
i
t
ude
modul
a
t
i
on
:
<0.2%
Stereo
Se
pa
r
a
t
i
on
:
>30dB
Distortion:
< 0.5%
Operation Time:
True 24/7
ambient temperature:
-10℃~+50℃
Antenna Design:
Rubber Antenna
Antenna Connector:
BNC type
Output Impedance:
50 ohm
AF
i
npu
t
l
e
v
e
l
:
<-15dbV
Audio Input Connector:
3.5mm headphone connector
Mic Input Connector:
3.5mm headphone connector
Size of Transmitter Unit:
L:113mm, W:88mm, H:39mm
Weight of Transmitter Unit:
263g
CZH-05B FM Transmitter Instruction Manual
Hardware Basics
1
、
Audio volume
2
、
MIC volume
3
、
3.5mm Jack for Audio Cable input
4
、
3.5mm Jack for electret microphone(And the computer use the same microphone) input
5
、
Power Button (On/Off)
6
、
"+"Frequency Up Button (To increase the radio frequency)
7
、
"-"Frequency Down Button (To decrease the radio frequency)
8
、
LCD Digital Display for the Radio Frequency
9
、
Jack for DC 9-12V
CZH-05B FM Transmitter Instruction Manual
10
、
Antenna socket
Installation Instruction
Connect the Antenna to FM Transmitter.
Connect the FM Transmitter to AC Adapter, then plug AC adapter to power outlet.
* Note: When the Power supply is connected, the “OFF” signal will be show on LCD Digital Display.
Connect the iPod, MP3 or CD Player to FM Transmitter with the audio cable.
Using the FM Transmitter
1 Press Power Button to turn on the Digital Transmitter. The LCD Digital Display shows the pre-set
radio frequency channel (For example, 98.0MHz).
2. Turn on your radio and switch to FM channel, adjust the radio frequency channel to desired channel.
Now the radio will output as “zzz”sound or radio music now.
3. Then adjust the radio frequency channel of the Digital Transmitter to the same radio frequency channel
of the radio. (For example, if the radio frequency channel is set to 98.0MHz then the FM Transmitter
should also be set to 98.0MHz). When the radio frequency channel of the Digital Transmitter and the radio
are same, the “zzz” sound will stop. Adjust the volume to medium level in iPod or audio player, and start
playing music. Now you will hear the music playing from the mp3 or audio player will output from the radio.
Note: If volume level from mp3 or audio player is high, the music output from the radio will sound
distorted.
5. Adjust the volume in your radio until the satisfactory output is reached.
6. When interference occurs, the music from radio will not sound clear. In this case, please switch to
different channels by
repeating Step 2 and 3 until the music sound quality is clear again.
Adjustment of Radio Frequency Channels
CZH-05B FM Transmitter Instruction Manual
1.Press Power Button to turn on the FM Transmitter
2.Adjust the FM frequency channels: (Radio frequency channels adjustment range is 76.0MHz~108.0MHz.)
3.Press Frequency Up/Down Button to increase/decrease 0.1MHz radio frequency channels on the
Transmitter.
4.Press and hold the Frequency Up/Down Button to continuously increase/decrease radio frequency
channels on the Digital Transmitter.
Power On/Off and Power
Press Power Button turn off the FM Transmitter.
Important Notice
• This product should be kept in dry condition and away from water.
• Keep the product off direct sunlight or high temperature environment.
• Please unplug the power plug when it is not in use.
Troubleshooting
1、If the FM Transmitter does not function normally,
• Please check whether all wires/ cables being connected tight and correct.
• If the product cannot be powered on, check whether the AC adapter works and connects properly.
2、If music output from the radio is distorted (not clear),
• First, reduce volume from iPod or audio player to medium or lower volume range, and then turn up
volume from radio to desired level. The music sound quality should improve.
•If the pervious method does not improve the music sound quality, it means the problem may be
due to frequency interference. Then you need to switch to other channel.
3、If the volume output from the radio is too loud when the FM Transmitter is not being in use,
•When FM Transmitter is in used, desired volume output level from the radio is typically higher than
without using FM Transmitter. To prevent the volume output too loud when the FM Transmitter is not
being in use, you can decrease the radio volume and increase the iPod or audio player volume as long as
the sound from the radio remains clear.
4、If music output from the radio have current acoustic interference,
•Try to change the location of the transmitter, or change the location of the power supply, or change
the location of the audio line. Power supplymust be away from the transmitter at work.
Setting and adjustment of special functions
power adjustment and frequency adjustment
2010 V1.2 version with two level power adjustment: High power (H):> 500mW; low-power (L): <100mW
Step 1:
First press and hold the power switch " ",
and then insert the power plug to the power jack " ".
Step 2:
Release the power switch " " after 3 seconds , LCD screen shows the "H" or "L". Through
the "▲/▼" switch "H/L". Press "▲", LCD screen display "H", Press "▼" LCD screen display
"L". "H" is the output power > 500mW;, "L" is the output power <100mW.
CZH-05B FM Transmitter Instruction Manual
Step 3:
Press the power switch " " confirm settings, The LCD screen display "108.00MHz". This is the highest
frequency of use, Through the "▲/▼" can be changed it, adjustable range: 76-108Mhz..
Again press the power switch " " confirm settings, The LCD screen display "87.00MHz". This is the
lowest frequency of
use, Through the "▲/▼" can be changed it, adjustable range: 76-108Mhz..
Warning: lowest frequency high-end can not be even higher than the highest frequency.
For example, To set the transmitting frequency range is 90MHz to 100MHz,Through the "▲/▼" changed
to 100Mhz,
press the power switch " " confirm settings, follow Through the "▲/▼" changed to 90Mhz.
Step 4:
Press the power switch " " confirm settings, after 3 seconds , The LCD screen display "OFF". Again press
the power switch " " , The transmitter Start working.
CZH-05B FM Transmitter Instruction Manual
Appendix
Transmitter covering Distance
（
Reference: kilometer
）
Receive
sensitivity
0.2uV/12dB
Transmit
power
0.1
～
0.5W
Transmit
power
1
～
2W
Transmit
power
3
～
5W
Transmit
power
10
～
30W
Transmit
power
30
～
50W
City
0.1～0.5
0.5～1
1
～
2
3
～
5
5
～
8
Town
0.2～0.6
1
～
2
2
～
3
5
～
8
8
～
10
Environs
0.3～1
2
～
3
3
～
5
8
～
15
10～30
Widen Plain
0.5～2
3
～
5
8
～
20
10～30
20～40
Sea communication
1
～
3
5
～
15
10～30
20～40
20～50
★Only for reference, also the covering distance is concern with the antenna and environment.
CZH FM Transmitter, it's owners, and employees accept no responsibility whatsoever
for any consequences arising from the use or misuse of unlicensed or unapproved
equipment. We suggest that you check local laws before operating or purchasing
transmitting equipment. Again, it is your responsibility not to break the law.
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