Stonex SR35 UHF External Radio Modem
The SR35 is a rugged, high-power external UHF radio modem engineered for demanding RTK base-rover applications where reliable, long-range data transmission is non-negotiable. Operating across the 410-470 MHz frequency band with up to 200 programmable user-selectable channels, it delivers a maximum output power of 35 watts, making it one of the most capable external radios in its class for covering large survey sites and challenging terrain. Three selectable power levels give operators full control over range versus power consumption, while the three operating modes — Transceiver, Transmitter, and Repeater — make it a versatile backbone for both standard and networked RTK setups. Support for all major RTK radio protocols including Trimmark, Trimtalk, Satel, and Transparent EOT ensures compatibility across a wide range of GNSS receivers and systems. Integrated Bluetooth 2.0/4.0 and a 4G modem round out the connectivity options for maximum deployment flexibility in any region worldwide.
Specifications:
- Frequency Range: 410-470 MHz
- Max Output Power: 35W (selectable: 35W / 22W / 5W)
- Channels: Up to 200 programmable
- Operating Modes: Transceiver, Transmitter, Radio Repeater, Network Repeater
- Protocols: Transparent EOT, Trimmark, Trimtalk, Satel
- Data Rate: 4800 / 9600 / 19200 bps
- Channel Width: 12.5 kHz / 25 kHz
- Connectivity: Bluetooth 2.0/4.0, 4G LTE (USA and Europe bands)
- Waterproof Rating: IP67
- Operating Temperature: -40°C to +65°C
- Weight: 2 kg
