25W Wireless Data Modem 150MHz Marine Radio 20km Data Wireless
transfer VHF
General Introduction
To transmit serial data or voice
VHF band 150MHz or 230MHz
UHF band
Please indicate when you place order
Serial port RS232 or RS485, TTL
Control distance 20km
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
Parameter
| Parameter |
| Power output: | 25W |
| Distance: | 20km |
| Baud rate: | 1200/2400 programmable |
| Channel Space: | 12.5KHz |
| Bandwidth: | <25KHz |
| Receiving Sensibility | -114dBm@1200bps, -107dbm(9600bps) |
| Compatible with |
| LS-V series |
| Power |
| Power Supply: | 12V DC (default) |
| Transmitting current: | <6A |
| Receiving current: | <160mA |
| Sleep current: | <1mA |
| General |
| Modulation: | MSK |
| Frequency: | 150MHz or 230MHz |
| Data format: | 8N1, 8EI, 8O1 programmable, or other customize |
| Channel No.: | Written by software |
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
5. Double PLL, double VCO, High reliability
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
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 |
