09 - Telemetry Radios - Technical Specification
Current Product Range
Please refer to the individual datasheets on the VBOX Automotive website for our current telemetry radio range.
Legacy Products
TM4 Radios
| Input voltage | 6 to 30 V DC |
| Input current - Receiving | <50 mA |
| Input current - Transmitting | <200 mA |
| Radio transmission power | 500 mW |
| Carrier Frequency | 868 MHz (Euro) 915 MHz (USA) |
| Radio data rate | 38400 kbit/s |
| RS232 data rate | 115200 kbit/s |
The range of reliable transmission with a telemetry system depends on the antenna position and environment:
| Environment | Range |
|---|---|
| Difficult environment (blocked by buildings or trees) | 300 m (1000 ft) |
| Open environment with antennas at low level (clear view with antennas on car roofs) | 700 m (2300 ft) |
| Open environment with antennas at height (clear view with antennas mounted on masts of building rooftops) | up to 3500 m (11000 ft) |
As an example of performance, Base Station telemetry communication range has been measured at distances of around 10000 m when the antennas were on hilltops with line of sight.