HLLY 20W User Manual

The User manual of the 20W FM Transmitter
Thank you for selecting 20W FM RADIO STATION BROADCAST TRANSMITTER.
HLLY-20W IS FM A STEREO TRANSMITTER which apply PLL technology，so it's
transmission is very stable.
HLLY-20W 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
2SC1972,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!
HLLY-20W is design for amateur Radio fancier and not a professional transmitter!
Technical Criteria
F
1. POWER ：DC 9-->15V(RECOMMEND 12V)
2. WORK CURRENT：<2.3A
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：20W
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：600g
Machine Size：121×45×154mm
1 Method of Application
1. Link the 50 Coax cable to the "ANT"
2. Link the audio input to the "Audio"
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.
S Using Essential：
HLLY ELECTRONICS (Hongkong) CO., LTD
：
--3.5MM Stereo socket；
--(BNC Type） ，Be sure the link is stable；