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Satelline - Model 3AS VHF -Half-Duplex VHF Radio Modem
SATELLINE-3AS VHF is a half-duplex VHF radio modem that operates on 135 … 174 MHz frequency band. Channel spacing 12.5 and 25 kHz are available, with over-the-air data rates 9600 bps or 19200 bps, respectively. A special advantage of the VHF frequency band, is the wider coverage. With the same carrier power and antenna gain, the connection ranges are 30 to 50 per cent larger than those reached with an equivalent UHF radio modem.
The radio modem is compatible with the most widely used serial interfaces RS-232, RS- 485 and RS-422. The SATELLINE-3AS(d) VHF with 5 W output power and a heat sink is the appropriate choice when continuous transmission (when transmitter duty cycle exceeds 20%) is required. In mobile fleet management applications, use of VHF frequencies reduces signal fading significantly
The product is available with and without display and with or without a cooling part.
- Frequency range135 … 174 MHz
- Tuning range135 to 155, 138 to 160 MHz | 155 to 174 MHz
- Channel spacing12.5 / 25 kHz fixed
- Sensitivity/Carrier power-115 dBm / 5 W
- Interface RS-232, 422, 485
- Data speed Radio 19200 / RS 38400 bps
- Operating voltage range+10.6 to +25 Vdc (-15% / +20%)
- Power consumption RX 1.7 W / TX 6.6 W @ 1 W, 22 W @ 5 W
- Size/Weight137 x 67 x 29 mm / 265 g | 137 x 80 x 56 mm / 550 g
- Connectors D15 / TNC female