K5 Plus GNSS
- 25 -
Figure 2-19
§2.3 External Radio
§2.3.1 Radio features:
The radio GDL20 is a high-speed semi-manual wireless data transmission radio,
whose air transfer rate can be up to 19200 bps and the RF transmitter power is
larger, used in KOLIDA RTK measurement system.
Radio GDL20 adopts GMSK modulation, 19200bps transfer rate, low bit error
rate. RF frequency can cover 450-470MHz band. Data transmission mode of
GDL20 is transparent mode, the received data is sent to the RTK GPS system
unchanged.
Radio GDL20 data interface is a standard RS-232 interface, which can be
connected to any RS-232 terminal equipment for data exchange.
GDL20 digital radio research employs advanced radio frequency technology,
