Camel RF Electronic transmitter User manual

Camel RF Development Center
5WattFMtransmitterinstructionmanual Page1of5
5Watt FM transmitter instruction manual
Welcome Use the Camel RF PLL FM stereo transmitter
) Introduction：
Camel RF focus on RF technology research and development, in the V / UHF band analog and digital
RF circuit design has a strong development team. 10 Mhz to 4Ghz, 250W following the RF circuit
development projects.
Camel RF Independent production and joint development of various sizes power FM transmitter, FM
radio transmitter village, the campus radio FM transmitter, FM car transmitters, wireless audio, video,
data transmission products for users to choose. Anjie sales at home and abroad, as well as high-quality
wireless products. To give each customer the full technical support. Advanced debugging professional RF
equipment, a product for each of the performance and quality guarantee.
Thank you for selecting 5W FM RADIO STATION BROADCAST TRANSMITTER.
S-5W-ST IS FM A STEREO TRANSMITTER which apply PLL technology，so it’s transmission is very
stable.
S-5W-ST main board adopt the PLL FM Transmitter IC of ROHM (BH1415F)，BH1415F build in PLL、
Audio aggravation and Low Pass filter, The control board is made of AT89C205 and AT24C02, the HF
amplifier is made of 2 2SC3355、1 2SC2053 and 1 2SC1971,add up to 4 grade circuit。The board adopt HF two
layer PCB design，and the shell is made of wonderful aluminum，the whole little machine is very beautiful
and easy to use!
S-5W-ST is design for amateur Radio fancier and not a professional transmitter!

Camel RF Development Center
5WattFMtransmitterinstructionmanual Page2of5
) Technical Criteria：
1. POWER ：DC 9-->15V(RECOMMEND 12V)
2. WORK CURRENT：<1.3A
3. Preset FREQUENCY RANGE：88—108MHz(Center Frequency:97Mhz)
4. FREQUENCY STEPPING：0.1MHz
5. FREQUENCY STABLING METHOD：PLL
6. Measure of FREQUENCY Stability：LOWER Than 1KHz
7. MODULATION Mode：FM STEREO
8. Frequency Excursion：75KHz
9. HF Output Power：5W
10. Antenna Impedance：50Ω
11. Reference transmit range：2Km—4Km
12. S/N (stereo)：>40db
13. Stereo Resolution ：-55dB ( 100 ~ 5000Hz)；-45 dB ( 5000Hz ~ 15000Hz)
14. Frequency Response：40KHz~ 15 KHz±0.2dB (立)
15. Degree of Distortion ：<0.3%
16. Modulation Degree ：15%
17. Input Level：-15dBV
18. Machine Weight：300g
19. Machine Size：11.5CM* 7.5CM* 4.5CM
 Safe warning and attention：
zBefore using the frequency modulation transmitter, please read the correct use transmitter of " warning safely
and attentive matters " carefully.
zThe frequency modulation transmitter utilized radiowave radiation to broadcast. In the place where the radiation
of electric wave can not be covered, or even within the coverage of radiation, but the electric wave propagates
the condition in the more abominable place (for example behind the building one or not metal gate, near the
electric equipment products one,etc.) can have resulted in transmit there aren't electric wave the bad.
zIt is a little farther that users should try hard to leave radio, television while using this frequency modulation
transmitter, otherwise will influence other electric apparatuses to work normally.
 Item of using the transmitter and the aerial and paying attention to together：
zThis frequency modulation transmitter forbids launching in case of not connecting the radiator, may lead to the
fact the transmitter work is put and in charge of burning. (in order to damage this)
z500 have, higher than aerial building around environment that aerial erect try hard lofty perch to adopt
surrounding environment '). The feeder that the aerial joins tries hard to select short, you had better not be over
20 meters. Do the waterproof measure of defending the thunder and connecting well with aerial.
zPlease don't dismantle the transmitter and carry on the transformation by oneself, so as not to break down and
cause damages. As to this we will not offer the in-service attendance.
zPlease don't use frequency modulation transmitter for interfering with others' frequency, propagating uses such
as illegal information,etc., otherwise accept the consequences by oneself.
Method of Application：
1. Link the 50 ohm Coax cable to the “ANT”- (BNC Type），Be sure the link is stable；
2. Link the audio input to the “Audio”- 3.5MM Stereo socket；

Camel RF Development Center
5WattFMtransmitterinstructionmanual Page3of5
3. Link the DC POWER module to the “POWER”- 6.5mm POWER socket ( DC 12V(current >2A) Pay
Attention to the power polar ：inside positive; outside negative）。
4. After electrified,the frequency is the one of last power off。
5. Frequency Increase Control ：pull the button“UP”，every pull can increase 100KHz，pull the button for
more than 1 second，the stepping jump to 1MHz.
6. Frequency Decrease Control：pull the button“DOWN”，every pull can decrease 100KHz，pull the button
for more than 1 second，the stepping jump to 1MHz.
6Using Essential：
1. Please select high quality power module like switching power supply。
2. The voltage of power module must not higher than 15V .
3. Please do not alter the frequency when the transmitter is working because it may disturb the wireless
communication.
4. The distance between the transmitter and antenna should be more than 5 meter because antenna may
disturb the transmitter。
5. Recommend using GP antenna or J type antenna, Make sure the SWR(standing-wave ratio)of the antenna
lower than 2,otherwise the transmitter may be damaged because of the superheating of power tube,
attention the frequency of the antenna should match the frequency the transmitter, Do not use simple
antenna, otherwise the transmitter may also be damaged because of the superheating of power tube!
Simple Failure & Resolve Method：
Failure Phenomenon Reason Resolve Method
Short Transmit Distance 1 Antenna link failure Check the link of antenna
Short Transmit Distance 2 Frequency is too low or too high Reset the frequency
Short Transmit Distance 3 The power failure or low current Check power module
Frequency display failure Been strongly Disturbed Power off the transmitter and power on after 5
second
Audio Distortion Bad audio input or too high audio input Check the audio input or turn down the audio input
2Transmitter 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。

Camel RF Development Center
5WattFMtransmitterinstructionmanual Page4of5
FIGURE：
Main Polar
Ground net GPAntenna Sketch Map
Audio UP DOWN
Mucis input Freq Set
Power ANT
Power input Antenna out
p
ut
Transmitter Front Panel Transmitter Back Panel
Audio IN
Volume
Power
input
LM7805
BH1415F
Antenna
output
2SC1971
Transmitter Inside Structure
Freq Display

Camel RF Development Center
5WattFMtransmitterinstructionmanual Page5of5
Contact US
Name: Camel RF Development Center
Web: http://www.elecsky.net
Shop: http://www.elecsky.com
Blog: http://www.21say.com
Email: [email protected]