Shenzhen Qianhai Lensen Technology Co., Ltd
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25W VHF Radio Modem 150MHz Audio Radio Marine Wireless Monitoring
LS-V25000 25W power output radio modem.
We support RS232, RS485 or TTL interface, you can choose one
It is OK to transmit data or Voice
For data transmission, its baud rate is 1200bps or 2400bps.
I: Features:
1. High power output: 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 | RxD(Ａ) | RxD of RS-232 RS-485 A | RS-232,RS-485,TTL, only one valid | |
| ３ | TXD(Ｂ) | TxD 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 |
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