HLLY 20W User manual

HLLYELECTRONICS(Hongkong)CO., LTD
TheUsermanualofthe20WFM Transmitter
Thankyouforselecting20WFMRADIOSTATION BROADCAST TRANSMITTER.
HLLY-20WISFMASTEREOTRANSMITTERwhichapplyPLLtechnology soit s
transmissionisverystable.
HLLY-20WmainboardadoptthePLLFMTransmitterICofROHM(BH1415F)
BH1415FbuildinPLL、AudioaggravationandLowPass filter,Thecontrolboardismadeof
AT89C205 andAT24C02,theHFamplifierismadeof22SC3355、12SC2053 and1
2SC1972,add up to4gradecircuit。TheboardadoptHFtwolayerPCB design andtheshell
ismadeofwonderfulaluminum thewholelittlemachineisverybeautifulandeasytouse!
HLLY-20WisdesignforamateurRadiofancierand notaprofessionaltransmitter!
FTechnicalCriteria
1. POWER ：DC9-->15V(RECOMMEND 12V)
2. WORKCURRENT：<2.3A
3. PresetFREQUENCYRANGE：88—108MHz(CenterFrequency:97Mhz)
4. FREQUENCYSTEPPING：0.1MHz
5. FREQUENCYSTABLING METHOD：PLL
6. MeasureofFREQUENCYStability：LOWERThan1KHz
7. MODULATION Mode：FMSTEREO
8. FrequencyExcursion：75KHz
9. HFOutputPower：20W
10. AntennaImpedance：50Ω
11. Referencetransmitrange：2Km—4Km
12. S/N(stereo)：>40db
13. StereoResolution：-55dB(100 ~5000Hz)；-45dB(5000Hz~15000Hz)
14. FrequencyResponse：40KHz~15 KHz±0.2dB(立)
15. Degree ofDistortion：<0.3%
16. ModulationDegree ：15%
17. InputLevel：-15dBV
18. MachineWeight：600g
MachineSize：121×45×154mm
1MethodofApplication
1. Linkthe50 Coaxcabletothe “ANT”--(BNCType） Besurethelink isstable；
2. Linktheaudioinputtothe “Audio”--3.5MM Stereosocket；
3. LinktheDCPOWERmoduletothe “POWER”--6.5mm POWERsocket(DC
12V(current>2A)PayAttentiontothepowerpolar ：insidepositive;outsidenegative）。
4. Afterelectrified,thefrequencyistheoneoflastpoweroff。
5. FrequencyIncreaseControl ：pullthebutton“UP” everypullcanincrease100KHz
pullthebuttonformorethan1second thesteppingjumpto1MHz.
6. FrequencyDecreaseControl：pull thebutton“DOWN” everypull candecrease100KHz
pullthebuttonformorethan1second thesteppingjumpto1MHz.
SUsingEssential：

HLLYELECTRONICS(Hongkong)CO., LTD
1. Pleaseselecthighqualitypowermodulelikeswitching powersupply。
2. Thevoltageofpowermodulemustnothigherthan15V.
3. Pleasedo notalterthefrequencywhenthetransmitterisworkingbecauseitmaydisturb
thewireless communication.
4. Thedistancebetweenthetransmitterandantennashouldbemorethan5meterbecause
antennamaydisturbthetransmitter。
5. RecommendusingGPantennaorJtypeantenna,MakesuretheSWR(standing-wave
ratio)oftheantennalowerthan2,otherwisethetransmittermaybedamagedbecauseof
thesuperheatingofpowertube,attentionthefrequencyoftheantennashouldmatchthe
frequencythetransmitter,Donotusesimpleantenna,otherwisethetransmittermayalso
bedamagedbecauseofthesuperheatingofpowertube!
0Simple Failure & ResolveMethod
FailurePhenomenon Reason ResolveMethod
ShortTransmit Distance 1 Antennalinkfailure Checkthelinkofantenna
ShortTransmit Distance 2 Frequencyistoolowortoohigh Resetthefrequency
ShortTransmit Distance 3 Thepowerfailureorlowcurrent Checkpowermodule
Frequencydisplayfailure BeenstronglyDisturbed Poweroff thetransmitterand
poweronafter5 second
AudioDistortion Badaudioinputortoohighaudio
input
Checktheaudioinputorturn
downtheaudioinput
OTransmittercoveringDistance（Reference:kilometer）
Receive sensitivity
0.2uV/12dB
Transmit
power
0.1～0.20W
Transmit
power
1～2W
Transmit
power
3～20W
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
WidenPlain 0.5～2 3～5 8～20 10～30 20～40
Seacommunication
1～3 5～15 10～30 20～40 20～50
★Onlyforreference,alsothecoveringdistanceisconcernwiththeantennaandenvironment。
¶FIGURE

HLLYELECTRONICS(Hongkong)CO., LTD
Audio
Volum

HLLYELECTRONICS(Hongkong)CO., LTD
Audio
Volum
n
Audio
Input
On/Off Up Down
Mic
Input
Mic
Volumn
TransmitterFrontPanel
PowerInput
LCD
Fan
RFOutput
TransmitterBackPanel
Audio
Volum
n
LCD
Mic
Input
MCN RF
Amplifier
Cooler
RF
Output
Power
Input
Fan
TransmitterInsideStructure

HLLYELECTRONICS(Hongkong)CO., LTD
MainPolar
Groundnet
GPAntennaSketchMap