25W Wireless Audio Module VHF Voice Module 150MHz Wireless Walkie Talkie 10km Distance
I: Features:
1. High power output: 10W or 25W
2. Long transmission distance: up to 20km
3. VHF band 150MHz band or 230MHz band or 450MHz
4. Data transmission, voice transmission both ok
5. Double PLL, double VCO, High reliability
6. VOX function
II. Data sheet
A,General Index
● frequency:VHF and UHF frequency band (150MHz, 230MHz), can store about 400 channels
● frequency tolerance:±2.5ppm
● Channel spacing:25 KHz
● antenna impedance:50Ω
● environment temperature:-35 ℃~+75 ℃
● modulate mode:MSK
● air baud rate:1200bps/2400bps
B,Receiver Index
● sensitivity: ≤0.25uV
● ignal Noise Ratio(SNR): ≤-50dB
● Adjacent Channel Selectivity: ≥70dB
● Inter modulation interference: ≥70dB
● Spurious respouse immunity: ≥70dB
C,Transmitter Index
● Transmit Power: 25W
● modulate distortion: ≤3%
● residual frequency modulation: ≤-48dB
● frequency deviation: ≤5KHz
● ortho-channel power ratio: ≤-70dB
● stray power: ≤5uW
● RF distance: 20km(25W RF power in the open air)
D,Power supply
● DC: 12 V (±10%)
● waiting current: ≤ 1 6 0 m A
● transmitting current: ≤ 6 A ( transmit power 25W )
E,Dimension:
128*108*28mm
III. Pin Definition
| Connector | Pin No. | Pin name | Description | Remarks |
| Power connection | １ | VCC | DC:12V | Please use power DC 12V, more than 8A |
| | ２ | GND | Ground of power supply | |
| Signal connection | １ | TTL(TxD) | TxD of TTL | |
| | ２ | TxD(Ａ) | TxD of RS-232 RS-485 A | RS-232,RS-485,TTL, only one valid |
| | ３ | RxD(Ｂ) | RxD of RS-232 RS-485 B | RS-232,RS-485,TTL, only one valid |
| | ４ | TTL(RxD) | RxD of TTL | |
| | ５ | GND | Signal ground | |
| | ６ | PTT | Audio transmitting enable | Low level is for transmitting |
| | ７ | MIC | Audio signal input | Microphone input,modulation sensitivity 10mV |
| | ８ | SP | Audio signal output | Audio amplifier output 8ohm 0.5W |
| | ９ | SQ | Receiving signal checking | Receiving carrier signal, high level |
IV: Application of LS-V25000
Salvage, Marine control
public traffic
industrial automatic control
electric power schedule
water conservancy monitor
signal collection and transmission of railway system
oil extraction and transportation control
measure of oil or water wells
hydrological monitoring
weather station monitoring
forest protection
intelligent building
geological reconnoiter
mobile location
military training
Notes:
1. About the power supply.
This radio's power output is high to 25W. 12V power D.C., at least 8A is recommended to use. Please choose power D.C. with good fluctuation coefficient and anti-interference ability. If you use switch power supply, please keep the antenna far away from it to avoid antenna's inference.
2. About the antenna.
Please choose antenna compatible with your radio's frequency band. For long distance communication, directional and high gain antenna would help to reach better effects. And also, please try to mount antenna at higher level.
Antenna's and its cable's impedance should be accordance with radio's (50Ω). If not, whole unit's performance will be affected and it may damage the radio.
3. About antenna cable
Choose cable with 50Ω impedance and low decay material. Make sure it can be connected with radio and antenna successfully. Please also consider waterproof and lightning arrester.
4. Heat emission
If the radio needs to transmit for long time, please pay attention to transfer heat in time.
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25W Wireless Audio Module VHF Voice Module 150MHz Wireless Walkie Talkie 10km Distance Images
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